While driving vehicle stalled. Consumer was unable to restart vehicle, and had it towed to the dealer for inspection. Mechanic determined that the intake manifold needed to be replaced.

- Dobson, NC, USA

I purchased this car used from a dealer in 2001 in Michigan. (I don't think the air conditioning ever worked ). within a few months the traction control went out. It would be on, when the car started, but within driving 300ft. Would go out and could not be turned back on from the button. A few months after that all of the dash lights went out when ever you turned on the head lights. This was due to a bad switch & a short. Then the cruse control went out. A few months after that we had to replace the head gaskets due to the engine over heating by an unknown cause. 1 month after that we had to replace the engine after throwing a rod and cracking the engine block, due to the fact that there was still fluind in the engine from melted manafold.( this all took place between Nov. 2001 & Jan. 2002) after that the ignition had to be replaced because one of the wires was severed due to the wheel tilt. (we would tilt the wheel & could not start the car). In Nov. 2002 the transmission started to slip, we had it replaced. Then all at one time (2003) the battery went dead, the timing chain had jumped a tooth, the cam sensor, and the spark plugs which had been changed a few weeks before. A few weeks after that the engine overheated again due to a leak in the coolant resovoir bottel, this caused the head gaskets to blow again. It is now 2004 we have an ongoing electrical problem. Since mid 2003 we have gone through 3 PCM & 3 proms due to the fact the they kept frying ( a result of a bad ground that still can not be found), an altanator due to the fact that it had spikes. The check enging light would constantly come on & when the codes were pulled the egr vlave was listed, we replaced it and still the check engine light came on due to a still bad PCM. Now whenever we turn on the blinker the voltage gage moves in time with it due to a short. The RPM's surge at times while car is in motion or at idle, causing the car to satll or backfire. The cause is still unknown.

- 29 Palms, CA, USA

As stated many times here-upper intake manifold leaked around metal heat riser tube, leaking water into cylinders causing a vapor lock in cylinders. This problem is often misdiagnosed as head craked or gasket failure. The plastic manifold melts or chafes around tube causing a small hole in the sealed water jacket in the manifold. Water will directly leak into cylinder heads. Very easy fix and a good upper manifold from a junkyard will run around 100 as opposed to a new engine!

- Battle Creek, MI, USA

I have a 1995 Pontiac Bonneville which I purchased used from jim culligan GM Pontiac in 1996. After having the vehicle only one month the intake manifold gasket had to be replaced as there was a bulletin on it. It is obvious the dealer knew of this when it was sold. This gasket also had to be replaced at 39000 and 43000 miles and a history note of it was made. GM has now refused to replace this chronically defect problem at the 65000 mile and 84000 mile levels. The current gasket needed replacing with only 22000 miles on it. This type of part should not go this frequently and prevents a safety hazard should the oil leak out and cause engine failure while driving. GM is trying to say that because the vehicle has 84000 miles on it they will not pay. However this part should have been replaced after only 22000 miles on it. It is clear that GM is acting in bad faith and ms desiree richardson at GM customer service and moiz ahmad the area service manager refused to accept this problem. Mr ahmad will not even give me the courtesy of a call to show him the documentation I have and explain his decision. I have spoken to several mechanics who have all advised me GM is well aware of this problem and they replaced the defective part with even more defective parts. I have already to pay approximately $300 out of pocket to replace this intake manifold once and am now looking at having to do it again. This is a financial burden on my family and very unethical on GM's part to not own up to this well documented problem and be responsible. Your immediate attention to this problem would be greatly appreciated.J.pierino.

- Getzville, NY, USA

Consumer states upper intake manifold caught on fire causing a explosion. Please provide any additional information. Ts referenced in EA02-030

- Wichita, KS, USA

Consumer states that upper intake manifold failed while driving. All coolant dumped leaked into intake of engine causing engine to fail. Dealer had to replace vehicle's entire engine.

- Cropseaville, NY, USA

While driving intake manifold corroded, causing a hole to form. As a result, engine leaked.

- Venetia, PA, USA

This upper manifold upon failure results in burning coolant(toxic) and engine failure. I have been in touch with others that own the same model car. And the failure is still happening on later models. Some with less than 50,000 miles. This engine is being used on Chevrolet Impala and monte carlos, Pontiac Grand Prix, Buick Lesabre and older Oldsmobile 88 models. This is a very dangerous problem if it happens on the highway.failed part #1711-3136.

- Torrington, CT, USA

Design flaw with spring loaded screws, attaching exhaust pipe to manifold, creates a loud clunking noise.

- Yorba Lind, CA, USA