Two problems related to diesel engine have been reported for the 2005 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 GMC Sierra 2500 based on all problems reported for the 2005 Sierra 2500.
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.
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.