2008 Pontiac Grand Prix Service and Repair Manual

This factory service and repair manual for the 2008 Pontiac Grand Prix deals with two engines and two trims on one body. The Base and GXP are 4-door sedans, and power comes from either a 3.8L V6 or a 5.3L V8, both with overhead valves, natural aspiration and gasoline fuel. Specifications and torque values for the V6 and V8 are paired with procedures, wiring diagrams and diagnostics for fuel, ignition, cooling, transmission, brakes, suspension, steering and the electrical system.

Engines covered

• 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
• 5.3L V8 (325 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• GXP

Known issues on the 2008 Grand Prix. For the 2008 Grand Prix, the federal record shows 1 recall, tied to the ignition switch. On certain 2008 Grand Prix vehicles, a weighty key ring or a sharp jolt from the road could rotate the key out of run, killing the engine and possibly leaving the air bags unable to deploy. The fix added extra key rings and a slot insert or head cover to the keys. Owners have lodged 142 complaints: 43 on the electrical system, 29 on exterior lighting and 22 on air bags. Among them, 9 reported a crash, 8 an injury, 3 a fire and 1 a death. Ignition, electrical and air bag wiring diagrams and diagnostics apply.