Two problems related to diesel engine have been reported for the 2004 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 2500 based on all problems reported for the 2004 Sierra 2500.
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.
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.