Parts Interchange Manual

[GTRS Fiero]

SEATS & SEAT BELTS
SEATS '84-88: The Fiero driver's seat is notorious for tearing on the bolster due to wear from the driver's repeated entry and exit. The upholstery can be repaired or replaced by any competent auto upholstery shop. The seat backs in the '84-85 Fiero have provisions for speakers in the headrest.

The two seats in the Fiero are not a direct swap, but the seat bottoms will swap and the seat covers will swap. So you can extend the life of the driver's side seat cover by swapping the passenger side base. The seat backs will not swap due to the hardware for the recliner mechanism.

If you wish to use non-Fiero seats, we understand but cannot confirm the seats below will fit the Fiero. Some fabrication or modification to mounting systems may be required.

       '95-99 Chevy Cavalier
         2005 Chevy Cavalier
       '92-93 Pontiac Grand Am
       '93-95 Firebird/Camaro
         2001 Camaro
          '92 Sunbird
          '97 Sunbird
          '99 Sunbird GT
          '94 Saturn SC
     Mid '80s Corvette
    Late '80s Grand Am
    Late '80s early '90s Firebird/Camaro/Tans Am
    Honda Del Sol (years unknown)
   
Seats from other cars may require adapter plates or other fabrication to fit the bolt locations in the Fiero. Note that the floorboard bolts in the Fiero do not penetrate the floor but are captured in raised portions of the sheet metal. You can re-locate mounting holes but that will probably mean full penetration of the floor. Be prepared to properly seal any penetrations and protect the metal from corrosion.

Leather seat cover kits are available from mrmikes.com and can be installed by a competent do-it-yourselfer.

We understand that you can add power seats to a Fiero if you can handle the wiring. The power seat base in an Oldsmobile Calais (not sure what year) will bolt to a stock Fiero seat. The electric switches in the seat base must be moved to avoid interefering with the Fiero parking brake.

SEAT BELTS '84-88: Seat belts wear well and normally do not need replacing although periodic cleaning is appropriate. Some owners find the belt color objectionable and want new or used seat belts of a different color. We have read that the seatbelt mechanism is unique to the Fiero and therefore used seatbelts from other cars do not exist. We have also read that some of the late '80s Firebird seat belts are the same as the Fiero. We do not which version is true. It is possible to obtain racing seat belts (4 or 5-point suspension) which will fit the Fiero. It is also possible to get new belt material from JC Whitney which is then sewn to the Fiero hardware. Many upholstery shops will not handle the sewing of seatbelts because of liability issues.

[GTRS Fiero]

SHIFT KNOBS
The shift knobs in the Fiero, both auto and manual, are common to many late '80s GM cars. For example, the leather shift knob from an '87 Firebird fits the Fiero perfectly. The part number is 10126477. Many aftermarket knobs are made which will work in the Fiero.

[GTRS Fiero]

SPEAKERS
Dash Speakers:   All model Fieros used the same dash speakers, 10 Ohm 4" x 10" Delco units. As far as we can determine, the vehicles below used the same speakers somewhere in the vehicle. Note that Fieros which had "Premium Sound" (sub woofer option) had different speakers than other Fieros. A minimal amount of data on the "premium sound" speakers is shown below. ("Premium Sound" is the option which includes a separate amplifier and subwoofer system.)

Buick Skyhawk       '85-89
Cadillac Eldorado   '84-85
Chevy Blazer        '88-94
Chevy Cavalier      '85-94
Chevy Cavalier RS   '86-90
Chevy Cavalier Z24  '85-87
Chevy Citation II      '85
Chevy El Camino     '85-88
Chevy Monte Carlo   '78-88
Chevy Pickup EL     '85-88
Chevy Pickup S10    '86-95
Chevy Suburban      '92-95
Chevy Suburban      '92-95
GM Caballero        '85-88
GM Jimmy               '88
GM Sonoma           '93-95
GM Yukon            '92-94
GMC Pickup          '91-95
GMC Pickup Cab         '85
GMC Pickup S15      '86-93
Olds 98                '84
Olds Custom Cruiser    '90
Olds Cutlass        '84-88
Olds Regal          '78-87
Olds Riviera        '84-85
Pontiac Bonneville  '85-86
Pontiac Grand Prix  '86-87
Pontiac Sunbird     '84-88
Saab 900            '86-93
The original Fiero speakers are 10 ohm impedance. For optimum life on the factory radio/amplifier you should use 10 ohm replacements. Use of 8 ohm speakers or worse, 4 ohm speakers, will cause the amplifier to run hotter for the equivalent sound level as a 10 ohm speaker. If you do not run your radio/stereo at full volume, use of speakers which are not 10 ohm impedance should not make much difference.

We have read that the '98 and newer Chevy Tahoe and Chevy Suburban have 4 x 10 rear speakers which will transfer easily to the Fiero and work well. We do not have personal experience with this swap.

A same-size inexpensive replacement for the dash speaker is available under the brand name "Linear Research", Stock Number LR410S. This is a Chinese-made speaker which is advertised as 75 Watts nominal, dual cone, for 4-8 Ohm systems. This has been used successfully even though the OEM speakers are 10 Ohm impedance. We suggest the Linear Research speakers are not a good choice with high-power amplifiers but they do work with standard Fiero radio/tape players and would be a reasonable choice when repairing a car for purposes of sale. We have seen these speakers available at Pep Boys for around $15. The distributor is Recoton Company, 1090 Emma Oaks Trail, Lake Mary, FL 32746, (800) 732-6866.

There are many good quality aftermarket speakers such as Kenwood KFC-451C, Pioneer TSA-4103/4105 and AutoBahn AS41Q at about $100 a pair. The "Eclipse" brand is also reputed to be a good choice as are the Polk MOMO line, although the Polk units were discontinued in 2007 and may only be found on places like eBay. The Pyle PLG41.3 4"x10" Triaxial Speaker Pair is reportedly a very good replacement at around $33/pair plus shipping. Speakers are available at most audio shops and via the Internet at sites such as crutchfield.com and cardiscountstereos.com. Some speakers will come with plugs requiring an adapter or will need the wiring soldered or mechanically spliced. See the heading "Speaker Connections" below in this regard.

If you have the "premium sound option", the speakers are two-way units and provide better sound quality than the conventional OEM speaker. As of April 2005, replacement two-way dash speakers are available from GM Parts Direct for $27.44 each; the part number is 16042082. Unfortunately we do not have the part number for the companion sail panel speakers.

'86-88 B-Pillar Spkr.: The speakers in the B-pillars (also referred to as the "sail panel" speakers) are 4" x 6" and there are at least a dozen speakers made that will fit. The Rockford Fosgate FRC3246, Pioneer TS-4667, Kenwood KFC-4675, and AudoBahn AS46Q are some examples.
'84-85 Headrest Spkr.: The headrest speakers were a feature in '84-85 Fieros only. They are 3.5" diameter with 10 Ohm impedence. Many companies make a 3.5" speaker which can replace the originals and we have even seen them on blister packs in Wal Mart. Four speakers are required (two per seat) if a complete replacement is performed. Infinity, Polk, JBL, and AudoBahn are some of the manufacturers who make 3.5" speakers. The Sony Mobile XS-W3521 and Clearwater CWC-3D are 3.5" speakers which have both been sold on eBay as replacements for the Fiero (and Miata) headrest speakers. We have no personal experience with either but both have favorable comments on Fiero forums. A 4" speaker can be made to fit the headrest by trimming the surrounding foam. Information for adding headrest speakers can be found at this link: http://mrmikes.com/fierospeakers.htm
Sub woofer: The 5.25" speaker in the factory "Premium Sound" sub woofer is prone to failure due to age. The speaker frequently fails at the flex joint between the paper cone and the speaker frame. This usually can be repaired at less than the cost of a new speaker.
If a new speaker is desired, JL Audio makes one but we don't have the part number. Radio Shack makes a 5.25" Woofer (#40-1032) for about $20. Its wattage is 30 RMS, 60 peak, effective range 80-8,000 Hz, but we do not know the impedance and it may not be a good match for the amplifier. You will need to use some spacing material at the four mounting screws if this speaker is used. Sub woofer speakers can also be obtained at rodneydickman.com for about $35-40.

Speaker Connections: If you are working on speakers, note that the terminals labeled "A" and "B" on Delco speakers are - and +, respectively.

When using aftermarket speakers you may want adapters to connect the new speakers without resorting to cutting, splicing, or soldering. If so, you will need plug-in adapters to match the new speaker connections with the Fiero connector. In December of 2008 the following adapters were found using a web search. We have not verified these personally and you should check carefully to make sure they match both the old connector and new speakers:

From Circuitcity.com, Item number MET DW4500SH, $12.99/pair
From Crutchfield.com, Item number 12071009, $9.99/pair
From GDIElectronics.com, Metra part number 724500, $4.62/pair
Custom Installation, Soundproofing: An excellent writeup on upgrading the sound system in a Fiero is located at this link:

http://www.fiero.nl/forum/Forum3/HTML/000031.html

[GTRS Fiero]

SPEED SENSOR
The transmissions in a Fiero contain a gear-driven assembly that provides an electronic pulse used by the speedometer, Engine Control Module (computer), and ignition module. We do not have information on the speed sensor for the automatic transmission. The speed sensor for the manual transmission was common to the following vehicles, IF these vehicles also had manual transmissions:

For '85-88 Fiero

'86-87    Buick Skylark
'86-87    Buick Somerset
'88-89    Oldsmobile Cutlass Calais
'86       Pontiac 6000
'85-89    Pontiac Grand Am
'85-88    Pontiac Sunbird

[GTRS Fiero]

STABILIZER BARS
Stabilizer Bar: The '84-87 Fiero uses a 23 mm diameter stabilizer bar in the front but not the rear. The front Stabilizer Bar from an '87-99 GM H-body car (Bonneville, Olds 98) will fit the '84-87 Fiero.

New sway bars are available from the Fiero Store. A slightly larger 1" bar (25 mm) is available from Addco through AutoZone. The AutoZone part number is 758U (delete the "U" if you do not want urethane bushings) and it must be special ordered.

The '88 Fiero used a stabilizer bar in front and in the rear. We have no information about other cars using the same bar. New bars for the '88 are available from the Fiero Store. We have read that the front stabilizer bar on a 2000 Grand Prix will fit on the rear of the Fiero. We suspect that is true for only the '84-87 Fiero but do not know.

[GTRS Fiero]

STARTER MOTOR
'84-88: All Fieros used the same starter motor and it is common to many other cars. Starters which fit the Fiero will have one of the following identification numbers: 10455019, 10455020, 10455023, 10455055, 10465019, 10465034, 10465035, 10465394, 10495397, 10495398, 1109565, 1998429, 1998503, 1990584, 1998511, 1998523, 1998528, 1998533, 8104550230, 8104550550. Starter motors from the cars listed below will fit the Fiero.
Newer technology starter motors are available which fit both the 2.5L and 2.8L Fiero engines. We do not have GM part numbers but understand that 1996 and newer GM cars with the 60 degree V6 engine have a suitable mini-starter about half the size and weight of the original Fiero starter. For example, the starter from a 1998 Grand Prix 3.8L is an excellent replacement and about 7 pounds lighter than the original. The AutoZone part number for a suitable replacement is 96211.

Buick Century            '83  2.8L  Ident. 1109564
Buick Century         '84-89  2.8L
Buick Century            '93  2.2L
Buick Skyhawk         '84-88  Except OHC
Buick Skyhawk            '89
Buick Skylark            '83  2.8L  Ident. 1109564
Buick Skylark         '84-85  2.8L
Cadillac Cimarron     '84-88
Chevy Beretta         '87-89
Chevy Beretta            '90  3.1L
Chevy Beretta            '92  2.2L  10 mm batt. conn. stud
Chevy Beretta            '93  2.2L
Chevy Cavalier        '84-89
Chevy Cavalier           '92  2.2L  10 mm batt. conn. stud
Chevy Cavalier           '93  2.2L
Chevy Celebrity          '83  2.8L  Ident. 1109564
Chevy Celebrity       '84-85  2.8L
Chevy Celebrity       '86-90  6 cylinder
Chevy Citation           '83  2.8L  Ident. 1109564
Chevy Citation        '84-85  2.8L
Chevy Corsica         '87-89
Chevy Corsica            '90  3.1L
Chevy Corsica            '92  2.2L  10 mm batt. conn. stud
Chevy Corsica            '93  2.2L
Chevy Lumina Car         '90  3.1L
Chevy Lumina Van         '90  3.1L
Isuzu Trooper         '88-91  2.8L
Olds Ciera               '83  2.8L  Ident. 1109564
Olds Ciera            '84-89  2.8L
Olds Ciera               '93  2.2L
Olds Cutlass          '88-89  2.8L
Olds Cutlass          '89-90  3.1L
Olds Firenza             '84  OHV
Olds Firenza          '85-86  2.0L
Olds Firenza          '85-86  2.8L
Olds Firenza             '87  2.0L  OHV
Olds Firenza             '87  2.8L
Olds Firenza             '88  OHV
Olds Omega               '83  2.8L  Ident. 1109564
Olds Omega               '84  2.8L
Olds Regal            '88-89
Olds Regal               '90  3.1L
Olds Regal               '91  3.1L  10 mm batt. conn. stud
Olds Silhouette          '90
Pontiac 2000             '84  OHV
Pontiac 6000             '83  2.8L  Ident. 1109564
Pontiac 6000          '84-89  2.8L
Pontiac 6000          '88-91  3.1L
Pontiac Grand Prix    '88-89
Pontiac Grand Prix       '90  3.1L
Pontiac Phoenix          '83  2.8L  Ident. 1109564
Pontiac Phoenix          '84  2.8L
Pontiac Sunbird       '85-86  OHV
Pontiac Tempest       '87-90
Pontiac Tempest          '92  2.2L  10 mm batt. conn. stud
Pontiac Tempest          '93  2.2L
Pontiac Trans Sport      '90
Alternative Starter Motors: The starter motors on the vehicles below will fit the Fiero by switching the starter motor nose housing. The starters will have one of the following identification numbers: 10455013, 10455050, 10455065, 10465065, 12558851.
Chevy Blazer S10/GM Jimmy S15   '91-94  3.1L 
Chevy Blazer S10/GM Jimmy S15      '95   
Chevy Forward Control           '90-93  4.3L 
Chevy Pickup                    '90-91  4.3L 
Chevy Pickup                       '91  5.0L 
Chevy Pickup                       '92  4.3L 
Chevy Pickup                       '92  5.0L  100 amp alternator
Chevy Pickup                       '93  4.3L 
Chevy Pickup                       '93  5.0L  100 amp alternator
Chevy Pickup                       '94  4.3L 
Chevy Pickup                       '94  5.0L  100 amp alternator
Chevy Pickup                    '96-97  4.3L 
Chevy Pickup                    '96-97  5.0L 
Chevy Pickup                    '96-97  5.7L  Except Crew Cab
Chevy Pickup                       '98  4.3L 
Chevy Pickup                       '98  5.0L 
Chevy Pickup                       '98  5.7L  1500 Series Ext. Cab, 155.5" whl base
Chevy Pickup                       '98  5.7L  1500 Series Regular Cab
Chevy Pickup                       '98  5.7L  2500 Series
Chevy Pickup                       '98  5.7L  3500 Series w/o Crew Cab
Chevy Suburban                  '97-98  5.7L 
Chevy Tahoe/GM Yukon              '97  5.7L 
Chevy Tahoe/GM Yukon              '98  5.7L  2 door
Chevy Tahoe/GM Yukon              '98  5.7L  4 door 4x2
Chevy Van                       '91-93  4.3L 
Chevy Van                       '91-93  5.0L 
Chevy Van                          '94  4.3L 
Chevy Van                          '94  5.0L 
Chevy Van                       '95-98  4.3L 
Chevy Van                       '95-98  5.0L 
GM Syclone                         '91   
GM Typhoon                      '92-93  4.3L
GMC Forward Control             '90-93  4.3L 
GMC Pickup                      '90-91  4.3L 
GMC Pickup                         '91  5.0L 
GMC Pickup                         '92  4.3L 
GMC Pickup                         '92  5.0L  100 amp alternator
GMC Pickup                         '93  4.3L 
GMC Pickup                         '93  5.0L  100 amp alternator
GMC Pickup                         '94  4.3L 
GMC Pickup                         '94  5.0L  100 amp alternator
GMC Pickup                      '96-97  4.3L 
GMC Pickup                      '96-97  5.0L 
GMC Pickup                      '96-97  5.7L  Except Crew Cab
GMC Pickup                         '98  4.3L 
GMC Pickup                         '98  5.0L 
GMC Pickup                         '98  5.7L  1500 Series Ext. Cab, 155.5" whl base
GMC Pickup                         '98  5.7L  1500 Series Regular Cab
GMC Pickup                         '98  5.7L  2500 Series
GMC Pickup                         '98  5.7L  3500 Series w/o Crew Cab
GMC Van                         '91-93  4.3L 
GMC Van                         '91-93  5.0L 
GMC Van                            '94  4.3L 
GMC Van                            '94  5.0L 
GMC Van                         '95-98  4.3L 
GMC Van                         '95-98  5.0L 
Olds Bravada                    '91-94   
Pontiac Astro                   '91-96   
Pontiac Safari (GMC)            '91-96   
S10/S15/GM Sonoma               '91-95  4.3L   

[GTRS Fiero]

STEERING & SUSPENSION SYSTEMS
STEERING KNUCKLE (SPINDLE) '84-87: The steering knuckle in the '84-87 Fiero is also used in the cars below:
Pontiac 1000      '81-87
Pontiac Acadian   '76-87
Chevette          '76-87
STEERING KNUCKLE (SPINDLE) '88: The steering knuckles are unique to the '88 Fiero and not used in other cars. Replacements are available from the Fiero Store and rodneydickman.com.
Tie Rod Ends '88: The tie rod end for the '88 Fiero has Moog part number ES3238RL and NAPA part number 269-2957. These cross references to other GM models as follows:

BUICK
1995 - 1996 Riviera, all engines
1992 - 1992 Century FWD, all engines
1992 - 1993 Riviera, all engines

CADILLAC
1992 - 1996 Seville, all engines
1992 - 1993 Allante, all engines
1994 - 1996 DeVille, all engines
1992 - 1996 Eldorado, all engines

CHEVROLET
1993 - 2002 Camaro, all engines

CHEVY TRUCK
1992 - 1992 LUMINA APV, all engines

OLDSMOBILE
1995 - 1996 Aurora, all engines
1992 - 1992 Toronado, all engines
1992 - 1992 Cutlass Ciera FWD, all engines

OLDSMOBILE TRUCK
1992 - 1992 Silhouette, all engines

PONTIAC
1993 - 2002 Firebird, all engines

PONTIAC TRUCK
1992 - 1992 Trans Sport, all engines

SATURN
1991 - 2002 SC Coupe, all engines
1991 - 2002 SL Sedan, all engines
1993 - 2001 SW Wagon, all engines
CONTROL ARM, UPPER The upper control arm is unique to the Fiero. If parts are interchanged from other Fieros, note that beginning in 1986 GM provided a revised design with 1.6 degrees more positive camber. This arm was listed as a replacement for '84-85 Fieros (in the event replacement was required due to damage). Later in 1986 GM reverted to the earlier design. To minimize confusion, we are listing the part numbers for all years so it can be easily determined which control arms are used in each car.
Year                Left Side P/N     Right Side P/N
1984                10023748 (orig)   10023747 (orig.)
                    14094449 (repl)   14094450 (repl.)

1985                10023748 (orig)   10023747 (orig.)
                    14094449 (repl)   14094450 (repl.)

1986                10023748 (orig)   10023747 (orig.)
                    14094449 (repl)   14094450 (repl.)

1987                10023748          10023747

1988 coupe          10068613          10068614   

1988 GT   & Formula   10068615          10068616
   
CONTROL ARM, LOWER The lower control arms are also unique to the Fiero. Use donor parts when replacing. If replacing only one, be sure to observe proper part numbers.
Year                Left Side P/N     Right Side P/N
1984                10032528          10032527

1985                10042391          10042392

1986                10042391          10042392

1987                10042391          10042392

1988 coupe          10068637          10068638   

1988 GT   & Formula   10068611          10068612
REAR STRUTS
'84-87: The rear struts are unique to the '84-87 Fiero. Replacements are readily available from parts stores provided old springs are transferred to new struts.

'88: The rear struts are unique to the '88 Fiero. Replacements are available provided old springs are transferred to new struts. The top mounting plate for the strut differed on the GT and Formula which had the heavy-duty "WS6" suspension. Monroe strut number 10097835 will work for the '88 Fiero. Earlier year struts will work on the '88 if the holes are elongated where the strut mounts to the knuckle.

Rear Strut Mount Kit: A rear strut mounting kit for all Fieros is Strut-Tite 69647.

SUSPENSION BUSHINGS
Rubber bushings for Fiero control arms, sway bars, and sway bar links are no longer listed as available from GM. Moog makes aftermarket rubber bushings for the '84-87 Fiero and GM has part numbers that are said to work for the '88. Polyurethane bushings are also popular replacements and can be found at suspensionparts.com.

Bushing, Upper Control Arm    '84-87 Moog K6170
Bushing, Lower Control Arm    '84-87 Moog K6163
Busing, Upper Control Arm        '88 GM 462980
Bushing, Lower Control Arm       '88 GM 470722
Sway Bar, Front               '84-88 0.8125" dia. or smaller, Moog K5242
Sway Bar, Front               '84-88 0.875" dia. or larger, Moog K5242
Sway Bar End Link Bushings    '84-88 Moog K6262
SUSPENSION KIT '88
As of January 2005, an $85 kit of suspension parts (#4-0460) is available for the '88 Fiero from www.mmsacc-stainless.com which contains the following items:

Brake Caliper
Brake Dust Shield
Brake Hose Clamp
Lower Ball Joint
Lower Control Arm Mount
Rubber Bump Stop
Lower Shock Mount
Upper Sock Mount
Sway Bar Clamp
Tie Rod End
Upper Ball Joint
Upper Control Arm Shaft End
Upper Control Arm Shaft Mount
SPRINGS, FRONT
'84: The front springs are unique to the '84 Fiero. Various spring rates were available. (We don't know how many). If springs are transferred from another Fiero they should be in pairs. The springs are identified by yellow tags. If the tags are missing it is impossible to determine the spring rate by visual inspection.

'85-87: The front springs are unique to the '85-87 Fiero. Various spring rates were available. (We don't know how many). If springs are transferred from another Fiero they should be in pairs. The springs are identified by yellow tags. If the tags are missing it is impossible to determine the spring rate by visual inspection.

'88: The front springs are unique to the '88 Fiero. At least five spring rates were available. If springs are transferred from another Fiero they should be in pairs. The springs are identified by yellow tags. If the tags are missing it is impossible to determine the spring rate by visual inspection.

SPRINGS, REAR
'84-87: The rear springs are unique to the '84-87 Fiero. At least four spring rates were available. If springs are transferred from another Fiero they should be in pairs. The springs are identified by yellow tags. If the tags are missing it is impossible to determine the spring rate by visual inspection.

'88: The rear springs are unique to the '88 Fiero. At least four spring rates were available. If springs are transferred from another Fiero they should be in pairs. The springs are identified by yellow tags. If the tags are missing it is impossible to determine the spring rate by visual inspection.

STEERING RACK & PINION
'84 - 87: The steering rack includes the inner tie rods as well as the rack and pinion. All '84-87 Fiero steering racks will interchange. However there were two steering ratios available. The "quicker" ratio was used in all '84 cars and in '85-87 cars equipped with the WS6 option. (See Option Codes at the front of this manual.) No other cars used the same steering rack as the Fiero.

'88: The steering rack includes the inner tie rods as well as the rack and pinion. No other cars, including earlier Fieros, used the same steering rack. There were two steering ratios available. The "quicker" ratio was used on the GT or if the RPO sticker indicates the car had the WS6 option. (See Option Codes at the front of this manual.) The '88 Fiero was intended to have power steering but this was dropped. No production Fiero ever had power steering.

STEERING WHEEL & COLUMN
'84-88: Steering wheels used in the Fiero were also used in many other late '80s GM cars except for the Fiero in the center horn button. Fiero steering wheels with horn "paddles" are identical to other GM cars of the same vintage.

The steering columns used in the Fiero are unique and not used in other cars; there are no known direct swaps. There were at least fourteen variations in '84-85 involving tilt, wiper options, and ignition switch variations. All year Fiero steering columns will fit any Fiero with the exception of these potential variations. Steering columns can be rebuilt or purchased outright at columnsgalore.com/rebuilt.htm.

[GTRS Fiero]

SUN VISORS
The sun visors in a Fiero typically look bad due to deterioration of the material beneath the outer fabric. An auto upholstery shop can repair these easily with new material. Typical cost is about $60 a pair. The sun visors can also be repaired with the same fabric used for headliners which can be purchased at fabric shops such as JoAnn Fabrics and Hancock Fabrics.

Replacement sun visors with lights that look nearly the same as the Fiero can be obtained from a '88-89 Chrysler LeBaron ('90 will work but is slightly different), and Dodge Shadow, Daytona, and Sundance. The power for lighted sun visors can be connected to the overhead interior lights. The sunvisors from these cars seem a bit sturdier than those from a Fiero. We are told that sun visors from late model S-series Chevrolet trucks will also work well in the Fiero.

[GTRS Fiero]

THROTTLE BODY
THROTTLE BODY ASSEMBLY 2.5L
There is conflicting information about throttle bodies for the 2.5L Fiero. Some sources say that all GM 2.5L engines from '84-86 used the same throttle body. If you have a convenient salvage yard it is worth checking. We have not confirmed this and offer the information below from the "Hollander" manual:

'84 2.5L According to the Hollander manual, the throttle body in the '84 Fiero is unique - no equivalents. However Frank Catalano advised that the '82-84 Corvette, Camaro and Firebird equipped with the Crossfire injection system used the same TBI unit as the '84 Fiero. What's more, these throttle bodies can be bored and modified for increased horsepower. Boring service is available at crossfireinjection.net as of April 2010.

Throttle body assemblies from '85-88 Fieros will not fit the '84.

'85 2.5L Throttle bodies from the following will fit:

   Chevy Blazer S10/GM Jimmy S15    '85  2.5L
   S10/S15/GM Sonoma                '85  2.5L
'86 2.5L This throttle body is unique to the Fiero. No equivalents. Throttle body assemblies from '84-85 or '87-88 Fieros will not fit the '86.

'87-88 2.5L Throttle bodies from the following will fit:

   Buick Skylark       '87  2.5L
   Buick Somerset      '87  2.5L
   Olds Calais         '87  2.5L
   Pontiac Grand Am    '87  2.5L
THROTTLE BODY ASSEMBLY 2.8L
'85-88: This throttle body assembly, made for GM by Holley, is unique to the Fiero. No equivalents. If the throttle body needs to be replaced, use one from a donor Fiero.

[GTRS Fiero]

TIMING COVER & HARMONIC BALANCER
TIMING COVER'84-88 2.5L
The timing cover for the 2.5L had two designs. One included two nuts welded on for front oil pan attachment. When using this timing cover, use the early design seal #3923440 and fill the bolt holes with RTV sealant. The following vehicles used the same timing cover:

    Buick Century                   '82-90  2.5L
    Buick Skylark                   '82-85  2.5L
    Camaro                          '85-86  2.5L
    Chevy Blazer S10/GM Jimmy S15   '85-88  2.5L
    Chevy Celebrity                 '82-90  2.5L
    Chevy Citation                  '82-85  2.5L
    Chevy Lumina Car                   '90  2.5L
    Firebird                        '82-86  2.5L
    Olds Ciera                      '82-90  2.5L
    Olds Omega                      '82-84  2.5L
    Pontiac 6000                       '84  2.5L
    Pontiac Astro                   '85-90  2.5L
    Pontiac Phoenix                 '82-84  2.5L
    Pontiac Safari (GMC)            '85-90  2.5L
    Pontiac Ventura II                 '77  2.5L
    S10/S15/GM Sonoma               '82-93  2.5L
TIMING COVER'85-88 2.8L
'85-86 2.8L The timing cover for these engines is unique. Will not interchange with '87-88 Fiero.

'87-88 2.8L The timing cover for these engines is unique. Will not interchange with '85-86 Fiero.

HARMONIC BALANCER 2.5L
'84-86 2.5L: Harmonic balancer not used on these engines.

'87-88 2.5L: A harmonic balancer from the engines below will transfer:

    Buick Century            '87-91  2.5L
    Chevy Celebrity          '87-90  2.5L
    Chevy Lumina Car         '90-92  2.5L
    Olds Ciera               '87-92  2.5L
    Pontiac 6000             '87-91  2.5L
HARMONIC BALANCER 2.8L
The harmonic balancer for the V-6 has been discontinued by GM but part number 14085401 will fit if the timing marks from the old harmonic balancer are transferred carefully to the new one. Don't try to use the timing marks from the new balancer; they are 60 degrees off!

'85-86 2.8L: The harmonic balancer for these engines is unique. Will not interchange with '87-88 Fiero.

'87-88 2.8L: The harmonic balancer for these engines is unique. Will not interchange with '85-86 Fiero.

Harmonic Balancer, Aftermarket: Some aftermarket balancers for the Fiero are shown below.

Harmonic Balancer, 2.5L, '87-88  Dorman 594-027
Harmonic Balancer, 2.8L, '85-87  Dorman 594-013
Harmonic Balancer, 2.8L, '88     Dorman 594-008

[GTRS Fiero]

TORQUE CONVERTER
'84-88 2.5L: The torque converter from the 2.5L engine is found in many other GM cars:
Buick Century        '82-89  2.5L  converter in '82 from late models only
Buick Skylark           '82  2.5L  lock-up, late models only
Buick Skylark           '83  2.5L
Buick Skylark           '83  2.8L  VIN "Z"
Buick Skylark           '84  2.5L
Buick Skylark           '84  2.8L  VIN "Z"
Buick Skylark           '85  2.5L
Chevy Celebrity      '82-84  2.5L  converter in '82 from late models only
Chevy Celebrity         '84  2.8L  VIN "Z"
Chevy Celebrity      '85-89  2.5L
Chevy Citation          '82  2.5L  lock-up, late models only
Chevy Citation          '83  2.5L
Chevy Citation          '83  2.8L  VIN "Z"
Chevy Citation          '84  2.5L
Chevy Citation          '84  2.8L  VIN "Z"
Chevy Citation          '85  2.5L
Olds Ciera              '82  2.5L  only if trans. ID is PD or PW
Olds Ciera           '83-89  2.5L
Olds Omega              '82  2.5L  lock-up, late models only
Olds Omega              '83  2.5L
Olds Omega              '83  2.8L  VIN "Z"
Olds Omega              '84  2.5L
Olds Omega              '84  2.8L  VIN "Z"
Pontiac 6000         '82-89  2.5L  converter in '82 from late models only
Pontiac 6000         '83-84  2.8L  VIN "Z"
Pontiac Phoenix         '82  2.5L  lock-up, late models only
Pontiac Phoenix         '83  2.5L
Pontiac Phoenix         '83  2.8L  VIN "Z"
Pontiac Phoenix         '84  2.5L
Pontiac Phoenix         '84  2.8L  VIN "Z"
'85 2.8L: The torque converter in the '85 was also used in the following cars:
Buick Century        '87-89  2.8L  use 3-speed only in '89
Buick Skylark           '85  2.8L  EFI
Buick Skylark        '86-88  3.0L
Buick Somerset       '85-87  3.0L
Cadillac Cimarron    '85-86  2.8L
Cadillac Cimarron    '87-88
Cavalier             '85-91  six  cylinder
Cavalier             '92-93  3.1L
Chevrolet Beretta    '92-93  3.1L  transmission code LLC
Chevrolet Beretta    '87-91  six  cylinder
Chevy Celebrity      '85-86  2.8L  EFI
Chevy Celebrity      '87-89  2.8L
Chevy Celebrity         '90  3.1L
Chevy Citation          '85  2.8L  EFI
Chevy Corsica        '87-91  six  cylinder
Chevy Corsica        '92-93  3.1L  transmission identification LLC
Chevy Lumina Car        '90  3.1L
Chevy Lumina Car     '91-93  3.1L  3-speed only
Chevy Lumina Van     '90-91  3-speed only
Chevy Lumina Van        '92  3.1L  3-speed only
Olds Calais          '85-88  3.0L
Olds Ciera           '87-89  2.8L
Olds Cutlass         '88-89  2.8L
Olds Cutlass         '92-93  3.1L  3-speed only
Olds Firenza         '85-87  2.8L
Olds Silhouette      '90-91
Olds Silhouette         '92  3.1L
Pontiac 6000         '85-89  2.8L  in '85-86, converter only in EFI models
Pontiac 6000         '88-91  3.1L
Pontiac Grand Am     '85-87  3.0L
Pontiac Grand Prix   '92-93  3.1L  3-speed only
Pontiac Sunbird      '91-93  3.0L
Pontiac Tempest      '87-91  3.1L
Pontiac Tempest      '92-93  3.1L  transmission identification LLC
Pontiac Trans Sport  '90-91
Pontiac Trans Sport     '92  3.1L
'86 2.8L "CD": The '86 2.8L Fiero had two automatic transmissions, one identified as "CD" and one identified as "CP". The '86 CD transmission has the same replacements as the '85 2.8L Fiero.
'86 2.8L "CP": The '86 2.8L Fiero had two automatic transmissions, one identified as "CD" and one identified as "CP". The '86 CP transmission has the same replacements as the '87-88 2.8L Fiero.
'87-88 2.8L: The torque converter is unique to these Fieros and there are no other cars which use them. If a converter is needed try to get one from a donor Fiero or re-build the existing unit.
Although the '86-88 auto transmissions have unique torque converters, we suspect the '85 converter may interchange without problem. We have no information to confirm this. If such a swap is desired it should be discussed with a competent transmission supplier or remanufacturer.

[GTRS Fiero]

TRANSMISSION, AUTOMATIC
The Fiero automatic transmission is GM's TH-125C three-speed. Some variations exist depending on year and engine, so a swap with other Fieros should be done carefully.
'84: The cars below used TH-125 transmissions which will swap with the Fiero but they had transmission options other than automatic, so finding a transmission is not simply a matter of finding the correct vehicle.

   Buick Century            '82-83
   Buick Skylark               '82  2.5L lock-up converter
   Buick Skylark               '82  2.8L
   Buick Skylark            '83-84
   Chevy Celebrity          '82-84
   Chevy Citation              '82  2.5L lock-up converter
   Chevy Citation              '82  2.8L
   Chevy Citation           '83-84
   Olds Ciera               '82-84
   Olds Omega                  '82  2.5L lock-up converter
   Olds Omega                  '82  2.8L
   Olds Omega               '83-84
   Pontiac 6000             '82-84  gasoline engine
   Pontiac Phoenix             '82  2.5L lock-up converter
   Pontiac Phoenix             '82  2.8L
   Pontiac Phoenix          '83-84

TH-125 transmissions from the cars below can be used in the '84 Fiero if the neutral switch is removed.
   Buick Century            '85-88
   Buick Century               '89  2.5L
   Buick Century               '89  2.8L
   Buick Century            '90-92  2.5L
   Buick Century               '93  2.2L
   Buick Century            '94-95
   Buick Skylark               '85
   Chevy Celebrity          '85-89
   Chevy Citation              '85
   Chevy Lumina Van         '90-95
   Olds Cierra              '85-88
   Olds Cierra                 '89  2.5L
   Olds Cierra                 '89  2.8L
   Olds Cierra              '90-93  four cylinder
   Olds Cierra              '94-95
   Olds Silhouette          '90-94
   Pontiac 6000             '85-87
   Pontiac 6000             '88-89  front wheel drive
   Pontiac 6000                '90  2.5L front wheel drive
   Pontiac 6000                '91  2.5L
   Pontiac Trans Sport      '90-95

TH-125 transmissions from the cars below can be used in the '84 Fiero by switching the lock-up wiring and switches. Remove the neutral switch if needed.
   Buick Century         '84-85  diesel
   Buick Century         '89-93  3.3L
   Chevy Celebrity       '84-85  diesel
   Olds Ciera            '84-85  diesel
   Olds Ciera               '89  3.3L
   Olds Ciera            '90-93  six cylinder
   Pontiac 6000          '84-85  diesel
   Pontiac 6000             '90  3.1L  FWD
   Pontiac 6000             '91  3.1L

TH-125 transmissions from the cars below can be used in the '84 Fiero by transferring the lock-up wiring and switches.
   Buick Century        '82-83  diesel
   Chevy Celebrity      '82-83  diesel
   Olds Ciera           '82-83  diesel
   Pontiac 6000         '82-83  diesel



'85-87 TH-125 transmissions from the cars below can be used in the '85-87 Fiero.
   Buick Century               '85  gasoline
   Buick Century            '86-87
   Buick Skylark               '85
   Chevy Celebrity             '85  gasoline
   Chevy Celebrity          '86-87
   Chevy Citation              '85
   Olds Ciera                  '85  gasoline
   Olds Ciera               '86-87
   Pontiac 6000                '85  gasoline
   Pontiac 6000             '86-87

TH-125 transmissions from the cars below can be used in the '85-87 Fiero by changing the neutral switch as needed.

   Buick Century               '88
   Buick Century               '89  2.5L
   Buick Century               '89  2.8L
   Buick Century            '90-92  2.5L
   Buick Century               '93  2.2L
   Buick Century            '94-95
   Chevy Celebrity          '88-90
   Chevy Lumina Van         '90-95
   Olds Ciera                  '88
   Olds Ciera                  '89  2.5L
   Olds Ciera                  '89  2.8L
   Olds Ciera               '90-93  four cylinder
   Olds Ciera               '94-95
   Olds Silhouette          '90-94
   Pontiac 6000             '88-89   front wheel drive
   Pontiac 6000                '90  2.5L  front wheel drive
   Pontiac 6000                '91  2.5L
   Pontiac Trans Sport      '90-95

TH-125 transmissions from the cars below can be used in the '85-87 Fiero by switching the lock-up wiring and switches and by removing the neutral switch as needed.

   Buick Century            '82-85 diesel
   Buick Century            '89-93 3.3L
   Chevy Celebrity          '82-85 diesel
   Olds Ciera               '82-85 diesel
   Olds Ciera                  '89 3.3L
   Olds Ciera               '90-93 six cylinder
   Pontiac 6000             '82-85 diesel
   Pontiac 6000                '90 3.1L FWD
   Pontiac 6000                '91 3.1L

'88 TH-125 transmissions from the cars below can be used in the '88 Fiero.
   Buick Century               '88
   Buick Century               '89  2.5L
   Buick Century               '89  2.8L
   Buick Century            '90-92  2.5L
   Buick Century               '93  2.2L
   Buick Century            '94-95
   Chevy Celebrity          '88-90
   Chevy Lumina Van         '90-91
   Chevy Lumina Van         '92-95
   Olds Ciera                  '88
   Olds Ciera                  '89  2.5L & 2.8L
   Olds Ciera               '90-93    four cylinder
   Olds Ciera               '94-95
   Olds Silhouette          '90-91
   Olds Silhouette          '92-94
   Pontiac 6000             '88-89    FWD
   Pontiac 6000                '90  2.5L  FWD
   Pontiac 6000                '91  2.5L
   Pontiac Trans Sport      '90-95

TH-125 transmissions from the cars below can be used in the '88 Fiero by switching the torque converter lock-up wiring and switches.

   Buick Century            '89-93  3.3L
   Olds Ciera                  '89  3.3L
   Olds Ciera               '90-93  six cylinder
   Pontiac 6000                '90  3.1L FWD
   Pontiac 6000                '91  3.1L

Alternative Automatic Transmissions
It is feasible to install newer-design automatic transmissions in a Fiero such as GM's TH440-T4. With some qualification this can result in better acceleration and improved mileage. A thorough discussion with directions to relative web sites can be found at The Ogre's Cave, http://home.comcast.net/~fierocave/aodproj.htm.

[GTRS Fiero]

TRANSMISSION, MANUAL
Manual transmissions were offered for the Fiero in all production years. In 1984 only a four-speed transmission was offered but it came in two versions, one of which is referred to as the "Econo" model. The final gear ratio on this transmission was 3.32:1 to provide optimum mileage for the four-cylinder engine. Only a few thousand of these were offered. A 1984 Fiero containing the Econo four-speed will have "MY8" on the RPO (Regular Production Option) Code sticker located on the left front fender well. An "econo" transmission can be identified when out of the car by "NA" or "DJ" stamped on the bell housing. The other transmission which had a final ratio of 4.10:1 is identified by "UM" or "DW" stamped on the bell housing.
In 1985 the four-speed transmission was offered only on the V-6 engine. The four-cylinder engine came with a five-speed Isuzu.

In 1986 the four-speed was used on the V-6 until about mid-year when it was replaced by the five-speed Muncie 282 "Getrag". The five-speed Isuzu continued to be used with the four-cylinder engine. The latter two transmissions continued to be used on the V-6 and four-cylinder engines respectively in 1987-88, although some gearing changes occurred on the Isuzu. The Isuzu transmissions can be swapped in all '85-88 Fieros realizing that minor gearing changes may occur.

If you have doubts about which manual transmission is in your car, here is a link which should help: Manual Trans ID.

'84 4-speed: The following cars with four-speed manual transmissions will swap with the '84 Fiero:
   Buick Skyhawk         '82
   Buick Skyhawk      '83-84  4-speed w/o OHC
   Buick Skylark         '81  1.03" diameter cable holes
   Buick Skylark      '82-84
   Cadillac Cimarron     '82
   Chevy Cavalier        '82
   Chevy Cavalier     '83-84
   Chevy Celebrity       '84
   Chevy Citation        '81  1.03" diameter cable holes
   Chevy Citation     '82-84
   Olds Firenza          '82
   Olds Firenza       '83-84
   Olds Omega            '81  1.03" diameter cable holes
   Olds Omega         '82-84
   Pontiac 2000          '82
   Pontiac 2000       '83-84  4-speed w/o OHC
   Pontiac Phoenix       '81  1.03" diameter cable holes
   Pontiac Phoenix    '82-84
Four-speed transmissions from the cars below will fit the '84 Fiero if shift cables and shift cable mounting brackets are included. In some cases, the shift lever assembly may have to be included.

   Buick Skylark         '80   
   Buick Skylark         '81  0.8125" diameter cable holes
   Chevy Citation        '80   
   Chevy Citation        '81  0.8125" diameter cable holes
   Olds Omega            '80   
   Olds Omega            '81  0.8125" diameter cable holes
   Pontiac Phoenix       '80   
   Pontiac Phoenix       '81  0.8125" diameter cable holes
'85-86 2.5L, 5-speed Isuzu: This exact transmission is unique to the Fiero. However, five-speed transmissions from the cars below can be used if the shift arm is rotated 180 degrees.
   Buick Skylark        '86
   Buick Somerset     '85-86
   Cadillac Cimarron  '85-56  2.0L electronic speedometer
   Chevy Cavalier     '85-86  electronic speedometer
   Olds Calais         85-86
   Pontiac Grand Am   '85-86
Five-speed transmissions from the cars below can be used on the '85-86 2.5L engine if the speed sensor is changed as well as the shift arm and/or speedometer cable. The shift arm must be rotated 180 degrees to fit.

   Cavalier           '85-86  cable drive speedometer
   Cadillac Cimarron   85-86  2.0L cable drive speedometer
'87-88 2.5L, 5-speed Isuzu: This exact transmission is unique to the Fiero. However, five-speed transmissions from the cars below can be used if the shift arm is rotated 180 degrees.
   Buick Skylark         '87
   Buick Somerset        '87
   Chevrolet Beretta  '87-88  2.0L  gear driven speed sensor
   Chevrolet Beretta     '89  2.0L  trans code DAB or DHB, gear driven speed sensor
   Chevy Cavalier     '87-89  2.0L  electronic speedometer
   Chevy Corsica      '87-88  2.0L  gear driven speed sensor
   Chevy Corsica         '89  2.0L  trans code DAB or DHB, gear driven speed sensor
   Olds Calais           '87
   Olds Calais        '88-89  2.5L
   Pontiac Grand Am   '87-89  2.5L
   Pontiac Tempest    '87-88  2.0L  gear driven speed sensor
   Pontiac Tempest       '89  2.0L  trans code DAB or DHB, gear driven speed sensor
Five-speed transmissions from the cars below can be used in the '87-88 four-cylinder Fiero by switching the speed sensor, shift arm and/or speedometer cable. The shift arm must be rotated 180 degrees.

   Buick Skyhawk         '88  w/o OHC
   Buick Skyhawk         '89
   Chevy Cavalier     '87-89  2.0L cable drive speedometer
   Olds Firenza          '88  w/o OHC
'85-86 2.8L 4-speed: Four-speed transmissions from the cars below will swap:
   Cadillac Cimarron  '85-86 2.8L electronic speedometer
   Chevy Cavalier        '85 2.0L bracket mtd. cables, electronic speedometer
   Chevy Cavalier        '85 2.8L electronic speedometer
   Chevy Cavalier     '86-87 electronic speedometer
   Pontiac Sunbird       '85 2.0L bracket mounted cables
   Pontiac Sunbird       '86 2.0L
Four-speed transmissions from the cars below will fit the '85-86 2.8L by changing the speed sensor and/or the speedometer cable.

   Buick Skyhawk         '85  w/o OHC, bracket mtd. cables
   Buick Skyhawk         '86  w/o OHC
   Buick Skyhawk         '87
   Buick Skylark         '85  bracket mounted cables
   Cadillac Cimarron  '85-86  2.8L  cable drive speedometer
   Chevy Cavalier        '85  2.0L  bracket mtd. cables, cable drive speedometer
   Chevy Cavalier        '85  2.8L  cable drive speedometer
   Chevy Cavalier     '86-87  cable drive speedometer
   Chevy Celebrity       '85  bracket mounted cable
   Chevy Celebrity       '86
   Chevy Citation        '85  bracket mounted cables
   Olds Firenza          '85  bracket mounted cables
   Olds Firenza       '86-87
'86-88 2.8L 5-speed "Getrag": This exact transmission is unique to the Fiero. According to the Hollander manual, five-speed transmissions from the cars below can be used if the shift arm is rotated 180 degrees. However Rodney Dickman (rodneydickman.com) advises this information is incorrect. Rodney makes a hardware kit which will allow these transmissions to be used with the Fiero. Transmissions which will work are:
   Cadillac Cimarron  '87-88  gear driven speed sensor
   Chevrolet Beretta  '87-89  2.8L gear driven speed sensor
   Chevy Cavalier        '87  2.8L five speed, w/electronic speedometer
   Chevy Cavalier     '88-89  2.8L electronic speedometer
   Chevy Celebrity    '87-88  gear driven speed sensor
   Chevy Corsica      '87-89  2.8L gear driven speed sensor
   Pontiac 6000       '87-88  gear driven speed sensor
   Pontiac Tempest    '87-89  2.8L gear driven speed sensor
Five-speed Getrag transmissions from the cars below can be used in the '86-88 2.8L 5-speed Fiero by switching the speed sensor, shift arm, and/or speedometer cable. The shift arm must use the Rodney Dickman kit to work.

   Cadillac Cimarron  '87-88  cable drive speedometer
   Chevy Cavalier        '87  2.8L five speed w/cable drive speedometer
   Chevy Cavalier     '88-89  2.8L cable drive speedometer
   Olds Firenza          '87  2.8L five speed
Other 1987-94 GM cars (Pontiac Grand Prix, Pontiac Grand Am, etc.) used a similar Getrag 5-speed transmission but the linkage system for the slave cylinder and release arm is different than the Fiero. On these transmissions the release arm is inside the transmission and the slave cylinder mounts to the bell housing. Rodney Dickman offers an adapter that allows this version of the Getrag 5-speed to be used in the Fiero.

"Shift" and "Select" cables for Fiero manual transmissions can be obtained from California Push-Pull (push-pull.com) and rodneydickman.com.

[GTRS Fiero]

TURN SIGNAL STALK & CAM
The turn signal stalk on the Fiero varied with certain options such as windshield wiper controls and cruise control. Equivalent stalks were used on many GM cars of the same era. OEM replacements with delay wipers and cruise are still available under part number 25111290, although they are flat black instead of shiny. Aftermarket units are also available, typically in the "Help" brand of parts. The "Help!" brand P/N 49286 turn signal stalk listed for the '88 Fiero is better quality than for earlier years and will fit all Fieros, so use the one listed for the '88 if available.

A turn signal cam (a part that's inside the steering column and wears out with age) listed for all Fieros is Help! 49303.

[GTRS Fiero]

WATER PUMP
Water pumps for all model Fieros are readily available at parts stores. The water pump in the V-6 should NOT be replaced with a pump having a plastic impeller. If the engine overheats, the plastic impeller will spin on its shaft and thereafter fail to pump sufficient coolant. This leads to chronic overheating and possible damage. Replacement pumps should have metal impellers only. Metal impellers should also be the "closed" type such that you can see the vanes only from the side. It will look much like a vented brake rotor.

Replacement pumps which have worked well in the V6 are TRW/Carter PN# FP1843 and Pronto WP 281 (may be labeled Part # 18-205 or WP-561). You can see the vanes in these pumps only from the side. The impeller should not be the "open" type where you can see exposed vanes. Whatever pump you choose, be certain to verify the impeller is metal.