Caller said the plastic intake manifold broke. This happened without warning. Caller's wife had to get help to push the car off the road, and car was towed to a dealer. Caller said there was a recall # 04V090000. Manufacturer said this vehicle was not covered under the recall and would not offer any assistance.

- Ventura, CA, USA

The plastic intake manifold on my 1997 Bonneville warped causing coolant to leak into the engine which then seized the engine. Replaced intake manifold and rebuilt both engine heads. Total cost was $1,525. My mechanic told me this is a common problem on the GM 3800 series engines because the upper intake manifold is plastic. About 2 weeks later, a rod bearing failed. I was told it failed prematurely because coolant had entered the engine. I do not have a repair estimate yet. I believe all of these problems are related to the defective upper intake manifold.

- San Pedro, CA, USA

Vehicle back fired while driving, then stalled without warning. Driver tried to restart vehicle, but was unable to do so. Driver had the vehicle towed to the dealer, and mechanic determined that the intake manifold needed to be replaced.

- Ventura, CA, USA

The intake manifold or the plemium whatever you want to call the thing wore out and all of my engine coolant went into the fuel cylinders and locked my motor down I was headed to macon ga from douglas, ga going to the hospital were they had transfered my brother and here I am in perry, ga broke down because Pontiac puts a plastic intake manifold on a motor I feel like Pontiac should have to pay for this part being replaced. I also have trouble with my car surging between 35 and 55 miles per hour this is the sorriest car I have ever owed and I have owned 2 Grand Prix before this car but liked the body style of the Bonneville and I rhought that it would be a good car but boy was I wrong I bought the car in August,2002 and have spent enough money on repairs on it that I could probably done paid for another Grand Prix.after reading all the complaints on this sight I feel they should have a recall on them for the transmissions and the intake manifolds because they all seem to be related to me.people pay a lot of money for there cars and still have to put money in repairs its just not fair.

- Douglas, GA, USA

While driving at highway speeds vehicle stalled due to a cracked intake manifold gasket. The intake manifold gasket was replaced. The cracked gasket allowed water to leak into the cylinder's.

- Miami, FL, USA

A block from home our engine shut down. The upper manifold had a hole in it due to the manifold being plastic, and crystalizing over a period of time. It cost us $729 to get it fixed. Luckily our engine wasn't hot or we would have had more serious problems.

- Clarkston, WA, USA