2026 GMC Sierra 1500 problems
The 2026 GMC Sierra 1500 has 208 complaints on file with NHTSA. The largest share (48%) concerns engine. Next are drivetrain & axles (17%) and electrical system (9%).
At a glance
- Complaints
- 208 filed with NHTSA
- Most reported
- Engine 48% of complaints
- Crashes and fires
- 3 and 0
- Injuries and deaths
- 0 and 0
- Typical mileage
- 4,000 miles 22 complaints with mileage
Source: NHTSA owner complaints
Where the complaints are
Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.
When problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 22 |
| 20k to 40k miles | 0 |
| 40k to 60k miles | 0 |
| 60k to 80k miles | 0 |
| 80k to 100k miles | 0 |
| 100k to 120k miles | 0 |
| 120k to 140k miles | 0 |
| 140k to 160k miles | 0 |
| 160k to 180k miles | 0 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Of the 22 complaints that include odometer readings, half describe a problem before roughly 4,000 miles.
Safety-related details: 3 complaints mention a crash. Its complaints are less severe on average than those of 95% of model years in our database.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2026 ranks 12th most-complained-about out of 30 model years of the GMC Sierra 1500 with enough data (208 complaints in that window). It is also covered by 2 safety recall campaigns.
What owners wrote
A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.
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.
The contact owns a 2026 GMC Sierra 1500. The contact stated that while hauling a trailer and making a left turn at 5 MPH, at a busy intersection, the message "Shift to Park" displayed, and the vehicle lost motive power. The vehicle was restarted. The contact stated that the failure was persistent. The local dealer was notified of the failure by phone. The vehicle was taken to the dealer, where it was diagnosed that the telematics module had failed and needed to be replaced. The vehicle was repaired.