GMC Sierra 3500 owners have reported 83 power train related problems since 1996. Table 1 shows the 11 most common power train problems. The number one most common problem is related to the vehicle's power train (63 problems). The second most common problem is related to the vehicle's automatic transmission control module (6 problems). For details of each of the problem category, use the links in the table.
This 2024 GMC sierra heavy duty has experienced a continuous pattern of major mechanical and electrical failures since early ownership. The vehicle required a complete engine replacement under warranty at approximately 43,626 miles. Read details...
My truck has been exhibiting hard downshifting at certain speeds, when the powertrain loads up such as a grade change, and requires a downshift. I have complained about this issue to the dealership as early as 2022, and 33,185 miles. The dealership made me pay for a transmission $388. Read details...
Transmission cooling lines leaking. Read details...
The front end of the vehicle vibrated. The transmission, brakes, bucket seats, and differential unit malfunctioned. Read details...
The contact owns a 2008 GMC Sierra 3500. The contact stated that while getting a service inspection at the dealer, they found that there was a transmission line leak. The dealer advised him that the line needed to be replaced and that it was not covered under warranty. The vehicle was repaired. Read details...