GMC Jimmy knocking problems

Filed Jun 29, 2005 · Transmission · 75,020 miles · MA

2000 miles after the lower intake manifold gasket was replaced, vehicle spun #6 rod bearing and destroyed the whole engine. Gm is aware of thousands of complaints about the leaking intake manifold gasket. Often leads to catastrophic engine damage. Also found rusted dexcool blocking the hose to the radiator reservoir, which may have contributed to the problem.

Filed Nov 12, 2002 · CT

While towing there is a loud knocking coming from the rear ended of the vehicle. Please furnish additional information dealer is aware of the problem. Mr

Filed Jul 25, 2002 · Suspension · MI

Consumer states after finding out that he could not get his truck aligned, he took it to the mechanic and found out that his lower ball joints are moving approx 1-1 1/2 in. Consumer also says that when he shifts his truck from drive to reverse he hears a knock which also indicates this ball joint problem.

Filed Apr 8, 2001 · Acceleration, Engine · NY

Vehicle was accelerating to pass a slower vehicle on a hill. The throttle became jammed in a full open position causing the vehicle to continue to accelerate in traffic . The driver in an attempt to regain control of the vehicle shifted into neutral resulting in the engine over reving. The engine developed a knock which was later diagnosed as a failed connector bearing. Upon investigation as to cause of the jammed throttle valve it was discovered that a heat sensor (in the rubber boot between the air filter and the air intake manifold) had dropped onto the top of the engine insuch a way as to cause the throttle valve cam to jam in a full open position. This failure resulted in the engine being ruined and replaced at a cost of $2700 plus tax.

Filed Mar 16, 2001 · Engine, Fuel system · IN

Was driving vehicle when oil pressure light went out. Engine started knocking. Took to independent mechanic, and informed consumer of engine trouble. Oil pan showed no signs of oil. Paint had peeled off oil pan and clogged intake manifold. Contacted manufacturer , and representative sent out to check oil pan. At first indicated would help with repairs. Later, informed consumer engine was too old, and would not help with repairs. *ak

Filed Jan 28, 2001 · Engine · TX

I had complaints of engine knock since purchase new, dealer comment could not duplicate, finally took to another dealer and the could hear knock, dealer installed new crankshaft, vehicle still has knock in engine, also had to have radiator cleaned and coolant jug replaced due to rusty contamination, ABS causes skids at slow speeds on wet pavement

Filed Oct 5, 1999 · Engine · PA

While driving at any speed there is knocking noise coming from the vehicle, and vehicle stalls/hesitates, especially when pulling on hills.

Filed Oct 4, 1999 · Engine · CA

When starting the vehicle heard a knocking noise. Oil pressure gauge indicates that there is adequate oil in the vehicle. However, when the vehicle sits overnight all the oil drains out of the engine. Knocking noise is also heard on warm engine starts.

Filed Sep 22, 1999 · Brakes · PA

When driving and applying the brakes there was a loud knocking noise and the ABS system was working intermittently.

Filed Jul 4, 1999 · Engine · CA

Original engine failed at 104,616 miles (approx 1000 miles from home), taken to dealership and was told replacement engine would be installed within 2 days. Waited 24 days for completion of job (during this period was told the new engine was installed, and to come retreive the car. Upon arrival, car was not done). On july 2 returned to dealership to pick up car, the car made it approximately 70 miles before it started with loud knocking noises and a severe decrease in power. Car is now at another dealership (900 miles from home) who states "you need a new engine."