Diesel Engine Problems of GMC Sierra 2500

Emissions code showed up on the dash display. Tried to fix the fuel filter and cleaned a sensor off and it still shows the emissions code.

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Duramax diesel engine fuel injection pump broke with no notice while driving causing a total loss of power. Failure repair under warranty required replacement of pump, injectors, lines, filters and flush of fuel tank.

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Truck was at full throttle brakes would not stop truck diesel engine over powered brakes. Found gas peddle under floor mat luckly I put in nuteral and turned off ign glad my wife or kids were not driving death trap.

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The contact owns a 2007 GMC Sierra 2500. The contact stated that the vehicle's coolant is constantly low. The warning light indicated a low coolant level. The dealer diagnosed the cause of failure as the o ring missing from the fly wheel housing coolant. The dealer repaired the vehicle, however, the low oil indicator light illuminated. The dealer diagnosed the cause of failure as an oil filter leak. The seals and oil filter were replaced. When the contact picked up the vehicle, he noticed an oil leak. The vehicle has not been repaired. The current mileage is 4,000 and failure mileage was 650.

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The contact owns a 2005 GMC Sierra 2500 hd. The contact stated that when he drives his vehicle uphill with a trailer in tow, the vehicle slams into third gear, jerks, and overheats. The failure occurs at various speeds. The failure mileage was 35,000. Updated 5/13/08 the consumer stated several dealers were telling him different things as to what was wrong with the vehicle. The consumer believed there is a problem with the engine, transmission and transfer case. One dealer told the consumer the wrong transfer case was in the vehicle. A new serpentine belt was installed, the front differential was replaced, because the axle shaft was stuck, the axle seal was leaking and both high pressure lines of the hydroboost were leaking as well. The engine light illuminated. The charge air cooler was leaking residual oil from the lower right corner. Updated 05/13/08.

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2002 Chevrolet duramax 3/4 ton pick-up fuel system problems* the consumer stated the vehicle was hard to start, and had low power. The dealer replaced the fuel injection pump, the truck ran better, but it still was not right. The water pump was replaced.

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While traveling west of denver, colorado my 2005 GMC Sierra 2500hd equipped with the duramax diesel overheated to the point of the vehicle shutting down. This happened on a stretch of highway where there was no shoulder to pull off on resulting in an extremely hazardous condition. I have done extensive on-line research and have found this to be a common occurrence with the 2004. 5 and 2005 model year Chevrolet and GMC hd series trucks equipped with the diesel motor. Numerous people have taken their trucks to local Chevrolet and GMC dealerships but gm has been unable or unwilling to help thus far. These trucks are creating dangerous situations that I fear will result in serious injury or death.

Letter on behalf of constituent requesting assistance in difficulties dealing with gm regarding a manufacturer's defect in the electrical circuits in his 2004 GMC k2500 pickup truck. The consumer stated the vehicle stalled for no reason while driving 70 mph on the highway. He lost all electrical circuits, power steering and brakes. After 45 minutes, the vehicle restarted. The next day, the consumer took the vehicle to the dealer, where the mechanic found loose pins on the wiring harness connectors at c107 and c108. The mechanic stated he didn't believe that was the cause of the vehicle stalling, but they were loose. Since, the first failure, there have been 10 more failures. The consumer took the vehicle to another dealer where it has been since July 2, 2009 without a specific cause being found.