2026 GMC Sierra 1500 engine problems
100 complaints about engine have been filed for the 2026 GMC Sierra 1500, which is 48% of all its NHTSA complaints. It is the most reported problem area for this model year.
At a glance
- Complaints
- 100 48% 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 driving at an undisclosed speed, there was an abnormally loud and rough knocking sound coming from the engine block. The oil pressure decreased to zero, and the engine seized. There was no warning light illuminated before or after the failure. The vehicle was towed to a dealer, where it was diagnosed with a blown engine. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 5,018.
Other problems reported for the 2026 GMC Sierra 1500
- Drivetrain & axles 35 complaints
- Electrical system 18 complaints