1991 Pontiac Firebird Service and Repair Manual

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Factory-Grade Data

1991 Pontiac Firebird service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • Formula Coupe 2-Door
  • Trans Am GTA Coupe 2-Door
  • Trans Am Coupe 2-Door
  • Trans Am Convertible 2-Door
  • Base Convertible 2-Door
  • Base Coupe 2-Door

Engines covered

  • 5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated
  • 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated
  • 3.1L 189Cu. In. V6 GAS OHV Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

1991 Pontiac Firebird Recalls & Complaints

NHTSA #94V07700025/04/1994Component: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

THE FUEL FILLER NECK SOLDER JOINT CAN DEVELOP CRACKS OR PIN HOLE LEAKS, WHICH DOES NOT COMPLY WITH FMVSS NO. 301, "FUEL SYSTEM INTEGRITY." THE CRACKS AND HOLES CAN ALLOW FUEL VAPOR AND FUEL LEAKAGE.

Consequence

CONSEQUENCE OF NON-COMPLIANCE: GASOLINE VAPORS AND FUEL LEAKS CAN RESULT IN A FIRE IF EXPOSED TO A

Remedy

DEALERS WILL INSPECT THE FUEL TANK ASSEMBLY AND REPLACE THOSE WHICH EXHIBIT THE CRACKS OR PIN HOLE L

NHTSA #07E08800024/10/2007Component: EQUIPMENT

CERTAIN HONEYWELL FRAM RACING BRAND HP4 AND HP8 OIL FILTERS THAT WERE MANUFACTURED FROM MAY 25, 2006, THROUGH SEPTEMBER 14, 2007, AND SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR VEHICLES LIST ABOVE. TH

Consequence

THIS CONDITION MAY CAUSE INADEQUATE SEALING AND LOSS OF ENGINE OIL, POSSIBLY RESULTING IN A FIRE.

Remedy

HONEYWELL WILL REPLACE THE AFFECTED OIL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING NOVEMBER 20

NHTSA #91V06700022/04/1991Component: SEAT BELTS:FRONT:ANCHORAGE

THE METAL LATCHPLATES MAY NOT ENGAGE THE BUCKLE ASSEMBLIES, CAUSING A "NO LATCH" CONDITION. MOVEMENT OF THE SEAT OCCUPANT IN THIS CONDITION COULD CAUSE LATCHPLATE RELEASE FROM THE BUCKLE.

Consequence

UNBELTED OR INCORRECTLY BELTED SEAT OCCUPANTS ARESUBJECTED TO INCREASED RISK OF INJURY IN THE EVENT

Remedy

REPLACE THE RETRACTOR ASSEMBLY FOR THE SAFETY BELT (FRONT AND REAR IN COUPES AND FRONT ONLY IN CONVE

NHTSA #06E04300019/05/2006Component: FUEL SYSTEM, GASOLINE

CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURE

Consequence

THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I

Remedy

HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB

NHTSA #91V03100019/02/1991Component: VISIBILITY:WINDSHIELD

POOR BOND ADHESION BETWEEN THE WINDSHIELD GLASS AND THE MOUNTING, WHICH COULD ALLOW THE WINDSHIELD TO SEPARATE FROM THE VEHICLE DURING A COLLISION. THIS FAILS TO CONFORM WITH FMVSS 212.

Consequence

IF WINDSHIELD SEPARATION OCCURS IN A COLLISION, ANUNBELTED OCCUPANT COULD BE EJECTED FROM THE VEHICL

Remedy

REMOVE ALL SEALER FROM WINDSHIELD AND MOUNTING; APPLY NEW BONDING AND SEALANT MATERIAL, AND REINSTAL

TSB #10246631

Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

TSB #10006297

NO SERIAL DATA COMMUNICATIONS USING THE TECH 1 WITH A 1986 OR NEWER CAMARO, FIREBIRD OR CORVETTE WITH A 5.0 OR 5.7 LITRE ENGINE. SIT BULLETIN 1450640. *TT

TSB #634999

DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT

TSB #615073

SOME V6 ENGINES MAY, ON A VERY INFREQUENT BASIS, HAVE AN OIL ODOR CONDITION THAT IS GENERALLY ENCOUNTERED AFTER THE ENGINE'S OIL HAS BEEN CHANGED.TYPICALLY THE ODOR LASTS APPROXIMATELY 1000 MILES AFTER THE CHANGE OF OIL AND THEN DOES NOT RE

20011022Component: POWER TRAIN:AXLE ASSEMBLYCrash reported2 injured

THE RIGHT REAR AXLE BROKE DUE TO A BAD CASTING CAUSING THE WHEEL TO LEAVE THE VEHICLE AND THE CAR TO CRASH*AK

19950130Component: AIR BAGS:FRONTALCrash reported1 injured

CAR WAS IN AN ACCIDENT AND THE AIR BAG DIDN'T DEPLOY TALK TO DEALER WAS TO COME OUT AND LOOK AT THE CAR IN TWO WEEK IT IS NOW 12 WEEK AND NO ONE HAS LOOK. TT

20020826Component: AIR BAGS:FRONTALCrash reported

IN A FRONTAL COLLISION NONE OF THE AIR BAGS DEPLOYED ON IMPACT.*AK

20000121Component: AIR BAGS:FRONTALCrash reported

VEHICLE RAN INTO A TREE AT 40MPH HEAD-ON, AND THE AIR BAGS DID NOT DEPLOY. DEALER HAS NOT BEEN CONTACTED. *AK

20181211Component: FUEL/PROPULSION SYSTEM

SEAT BELT SOMETIMES LATCH AND SOMETIMES IT WON'T/ FUEL LEAK AND FUMES

Showing the 5 most serious of 29 complaints filed with NHTSA.

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