When driving and speed reached 40 mph the car vibrates, when speed reached 60 mph it vibrates again. When decelerating after driving for a little while, and speed reached 10 mph (while decelerating) the car vibrates violently, then shuts off. When I restart the engine it runs noisily while still in park, then shuts off again when put in gear. I have to wait a minute or two before I start the car and put it in gear and it runs, until I decelerate again and the cycle starts over. I have had my head gasket repaired/replace by jay Pontiac in columbus Georgia at my expense because I receive the recall notice on the head gasket leak several years after the recall campaign was over. I have had my alternator repaired/replaced, transmission problems, etc. The dealer never sees any problems when he diagnoses my car on his computer & everytime he suggests what the problem is and I go broke paying to get it fixed, the problem remains. I am very fed up with Pontiac & GM & their dealers/service people who seem to know nothing of their products' failure. I need to know what the problem is with my car so I can get it fixed. I am also seeking to purchase a new vehicle and from the horrible experience I've been having with Pontiac & GM I am staying away from their products and advising everyone I know to stay away from them. I am at the point where the only automobile product I am interested in is foreign made. I understand you get what you pay for, but I don't understand a product having problems even the manufacturer can't figure out.

- Douglasville, GA, USA

Had headgasket/ transmission/ both frontspeakers/ rear glass for rear defogger, and radio replaced once they say it needs to be replaced again, had one spark plug replaced.

- Lapeer, MI, USA

Automatic transmission failure. Whle driving uphill vehicle went to kick into overdrive and instead went into neutral wher eengine idled and would rev up but not go into any gear.

- Mt. Pleasant, PA, USA

Driver put car into reverse, stepped on gas, car went forward.

- Rancho San, CA, USA