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
CRACKS DEVELOP IN THE WHEEL MOUNTING SURFACE. IF THESE CRACKS BECOME SEVERE ENOUGH, THE WHEEL WILL COMPLETELY SEPARATE FROM THE VEHICLE.
IF WHEEL SEPARATION OCCURS WHILE THE VEHICLE IS IN MOTION, LOSS OF STEERING AND BRAKE CONTROL OF THE
DEALERS WILL INSPECT THE MANUFACTURING DATE CODES STAMPED ON EACH WHEEL OF THE VEHICLE AND IF A WHEE
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
CUSTOMERS MAY COMPLAIN OF GRINDING / SCRAPING / GROANING NOISE FROM REAR SUSPENSION. *TT
EMISSION CAMPAIGN 90-C-52 IGNITION (I.D.I.) COIL HOUSING CRACKED. *SD
ABS WARNING LIGHT IS ON. *TW
REAR STRUT RELATED THUMPING/SQUEAKING NOISE. *TW
ABS WIRE HARNESS FOR THE RIGHT FRONT WHEEL MAY RUB ON THE BRAKE LINE CAUSING THE ABS WARNING LIGHT TO COME ON. *TW
VEHICLE SUDDENLY ACCELERATED CAUSING MULTIPLE ACCIDENTS AND INJURY TO OCCUPANTS.
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
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
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
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.
