1990 Pontiac Grand Prix Service and Repair Manual

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Factory-Grade Data

1990 Pontiac Grand Prix 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

  • LE Sedan 4-Door
  • SE Coupe 2-Door
  • STE Sedan 4-Door
  • Mclaren Coupe 2-Door
  • LE Coupe 2-Door

Engines covered

  • 2.3L 138Cu. In. l4 GAS DOHC Naturally Aspirated
  • 3.1L 189Cu. In. V6 GAS OHV Naturally Aspirated
  • 3.1L 189Cu. In. V6 GAS OHV Turbocharged

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

1990 Pontiac Grand Prix Recalls & Complaints

NHTSA #95V11500005/06/1995Component: WHEELS

CRACKS DEVELOP IN THE WHEEL MOUNTING SURFACE. IF THESE CRACKS BECOME SEVERE ENOUGH, THE WHEEL WILL COMPLETELY SEPARATE FROM THE VEHICLE.

Consequence

IF WHEEL SEPARATION OCCURS WHILE THE VEHICLE IS IN MOTION, LOSS OF STEERING AND BRAKE CONTROL OF THE

Remedy

DEALERS WILL INSPECT THE MANUFACTURING DATE CODES STAMPED ON EACH WHEEL OF THE VEHICLE AND IF A WHEE

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

TSB #6088680

CUSTOMERS MAY COMPLAIN OF GRINDING / SCRAPING / GROANING NOISE FROM REAR SUSPENSION. *TT

TSB #45857

EMISSION CAMPAIGN 90-C-52 IGNITION (I.D.I.) COIL HOUSING CRACKED. *SD

TSB #39072

ABS WARNING LIGHT IS ON. *TW

TSB #39080

REAR STRUT RELATED THUMPING/SQUEAKING NOISE. *TW

TSB #37955

ABS WIRE HARNESS FOR THE RIGHT FRONT WHEEL MAY RUB ON THE BRAKE LINE CAUSING THE ABS WARNING LIGHT TO COME ON. *TW

19971110Component: VEHICLE SPEED CONTROLCrash reported3 injured

VEHICLE SUDDENLY ACCELERATED CAUSING MULTIPLE ACCIDENTS AND INJURY TO OCCUPANTS.

19971110Component: VEHICLE SPEED CONTROL:ACCELERATOR PEDALCrash reported2 injured

ACCELERATOR WENT TO THE FLOOR ON ITS OWN. OWNER APPLIED THE BRAKES , THE PEDAL RESISTED AND BECAME HARD, CAUSING THE VEHICLE TO COLLIDE. THE DEALER HAS NOT BEEN NOTIFIED. *AK

19971110Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported2 injured

ACCELERATOR WENT TO THE FLOOR ON ITS OWN. OWNER APPLIED THE BRAKES , THE PEDAL RESISTED AND BECAME HARD, CAUSING THE VEHICLE TO COLLIDE. THE DEALER HAS NOT BEEN NOTIFIED. *AK

20060428Component: SUSPENSION:REARCrash reported1 injured

DT*: THE CONTACT STATED WHILE DRIVING 40MPH THE LEFT REAR WHEEL STEERED 45 DEGREES TO THE SIDE AND THE VEHICLE WENT OUT OF CONTROL. THE VEHICLE COLLIDED HEAD ON WITH A TREE. THE DRIVER WAS WEARING

20001226Component: AIR BAGS:FRONTALCrash reported1 injured

WHILE DRIVING 30MPH HIT A TREE AND FRONT WAS IN A V SHAPE AFTER ACCIDENT. AIR BAGS DID NOT DEPLOY. RADIATOR AND HOOD WERE NO GOOD. *AK THE BUMPER WAS SPLIT IN HALF AND THE HOOD BUCKLED IN A 45 DE

Showing the 5 most serious of 249 complaints filed with NHTSA.

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