1995 Pontiac Bonneville Engine cooling Problems

“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. …”

“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. …”

“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!”

“In february 2010, driving at 5 MPH while making right turn on bumpy blacktop, the engine fell out from under car causing steering to become inoperable. Car was towed from scene. Upon investigation it was found that 4 (rear) of 6 bolts holding engine cradle to uni-body frame pulled through rusted retainers. All (6) bolts, retainers, spacers and insulators were replaced. The steering linkage was reattached and the clock spring coil kit was replaced (clock spring was torn when steering linkage separated). This incident caused a lot of concern because it could have happened at any speed. …”

“The transmission failed at ~76,000 miles. Replaced at GM dealer with a remanufactured GM unit. 06/23/2001. Brake failure - warning light at 81,728 miles. Replaced master cylinder and rear wheel cylinders. Antilock brakes have always behaved strangely at times but have never failed to stop the car in a reasonable distance. 09/22/2001. Engine failure at 82,449 miles. Replacement engine installed at independent repair shop for $1400.00. . Repair leaking genuine GM replacement transmission. …”