1991 Pontiac Grand Prix Service and Repair Manual

This factory service and repair manual for the 1991 Pontiac Grand Prix brings together three engines with distinct valvetrains: a 2.3L inline-four and a 3.4L V6, both using double overhead camshafts, plus a 3.1L V6 with overhead valves. None is boosted, and fuel is gasoline throughout. Buyers could pick a 4-door sedan or a 2-door coupe across four trims, GT, LE, SE and STE. Procedures, specifications and wiring diagrams extend to the engine, fuel, ignition, cooling, transmission, brake, suspension, steering and electrical systems.

Engines covered

• 2.3L inline-four (138 cu in) — DOHC, naturally aspirated, gasoline
• 3.1L V6 (189 cu in) — OHV, naturally aspirated, gasoline
• 3.4L V6 (207 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan
• 2-door coupe

Trims covered

• GT
• LE
• SE
• STE

Known issues on the 1991 Grand Prix. There are 4 recalls on record for the 1991 Grand Prix. On certain 1991 Grand Prix vehicles, coupes only, the fog lamps and both headlamp beams could run at once and overload the headlamp circuit breaker, leaving the car without headlamps or fog lamps; that campaign covered 6,013 vehicles. Cradle bolt retainers on certain 1991 Grand Prix vehicles in heavy road-salt regions could corrode and release the bolts, and front shoulder belt guide loops on certain 1991 Grand Prix vehicles might be cracked, with cracked ones getting reinforcing plates. Complaints total 172, led by the hydraulic service brakes at 76; 9 reported a crash, 7 an injury and 4 a fire. Lighting wiring diagrams and brake procedures apply.