Upper intake plenum disintegrated.
Upper manifold gaskets had to be replaced.
Coolant is no good, eats away everything... turns to mud in no time. Flushed it all out and installed new coolant (green stuff).
Wheel bearings on both fronts failed.
Transmission has many expensive issues.
Fuel lines and brake lines rusted out.
Rear lower axle trailing arms are paper thin, and the left side broke in two.
The car eats brakes like it's going out of style.
Seats are crappy and split.
Drinks gas like a guzzler.
The car is in general a mechanical nightmare. Stay away from this junkbox.
GM has had all kinds of problems with the 4T65E transmission... Do a search, you will find tons on it, as with the Dex-cool coolant. The Grand Prix with the 3.8 is the same junk.
Worst lemon ever built. Boat loads of mechanical problems with this car. Engine, trans, suspension; you name it, and it's got problems.
Would you buy another car from this manufacturer? No
Review Date: 27th May, 2011