2026 GMC Sierra 1500 drivetrain & axles problems
Owners reported drivetrain & axles problems in 35 complaints for the 2026 GMC Sierra 1500, 17% of the complaints on file. It is the 2nd most reported problem area for this model year.
At a glance
- Complaints
- 35 17% of this year's complaints
- Crashes and fires
- 1 and 0
- Injuries and deaths
- 0 and 0
Source: NHTSA owner complaints
What the data shows
These complaints mention 1 crash.
What owners wrote
5/08/2026: I stopped outside my garage. I then placed the truck in park and exited the vehicle while running. I went inside my garage and several minutes later, heard a crash. The truck had driven forward while unattended, and crashed into the corner of my garage, causing damage to both the building and the truck. Truck indicated it was still in park upon reentry.
The contact owns a 2026 GMC Sierra 1500. The contact stated that while her husband was driving approximately 10 MPH, the vehicle unexpectedly shut off and independently shifted into park(P). The contact stated that previously, while the vehicle was idling in a parking lot, with air conditioner activated, the Auto START/STOP feature engaged, and the vehicle shut off. The message “Service Transmission” was displayed. The vehicle was taken to a local dealer and was diagnosed with transmission failure.
Other problems reported for the 2026 GMC Sierra 1500
- Engine 100 complaints
- Electrical system 18 complaints