1999 Pontiac Grand Prix Service and Repair Manual

This factory service and repair manual for the 1999 Pontiac Grand Prix covers the 2-door coupe and the 4-door sedan, along with the GT, GTP and SE trims built on them. Under the hood, buyers found overhead-valve V6 power in three forms: a 3.1L, a 3.8L without forced induction, and the same 3.8L displacement fed by a supercharger. Gasoline is the fuel throughout. The engine, fuel and cooling systems, ignition, transmission, brakes, steering, suspension and electrical system are handled with procedures, specifications and torque values.

Engines covered

• 3.1L V6 (189 cu in) — OHV, naturally aspirated, gasoline
• 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
• 3.8L V6 (231 cu in) — OHV, supercharged, gasoline

Body styles covered

• 4-door sedan
• 2-door coupe

Trims covered

• GT
• GTP
• SE

Known issues on the 1999 Grand Prix. Among the 4 recalls on record for the 1999 Grand Prix, one involves the driver's air bag: on certain 1999 Grand Prix vehicles the inflator could build too much pressure and burst during deployment, throwing fragments at occupants. The risk of oil reaching the exhaust manifold accounts for the others. Certain 1999 Grand Prix vehicles with the supercharged 3.8L had a front rocker cover gasket prone to early heat damage and seepage, and certain 1999 Grand Prix vehicles with the naturally aspirated 3.8L could drop oil onto the manifold under hard braking. Owners logged 412 complaints, 152 on the engine and cooling; 125 reported a fire, 13 a crash, 8 an injury and 2 a death. Engine and air bag procedures apply.