2021 GMC Sierra 1500 engine problems
370 complaints about engine have been filed for the 2021 GMC Sierra 1500, which is 45% of all its NHTSA complaints. It is the most reported problem area for this model year.
At a glance
- Complaints
- 370 45% of this year's complaints
- Typical mileage
- 59,000 miles 73 complaints with mileage
- Crashes and fires
- 0 and 5
- Injuries and deaths
- 1 and 0
Source: NHTSA owner complaints
When engine problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 10 |
| 20k to 40k miles | 12 |
| 40k to 60k miles | 15 |
| 60k to 80k miles | 9 |
| 80k to 100k miles | 13 |
| 100k to 120k miles | 6 |
| 120k to 140k miles | 7 |
| 140k to 160k miles | 1 |
| 160k to 180k miles | 0 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Of the 73 engine complaints that report mileage, the median is about 59,000 miles, and 51% were reported before 60,000 miles.
These complaints mention 5 fires, 1 injury.
What owners wrote
Tl* the contact owns a 2021 GMC sierra 1500. The contact stated that while driving at 60 MPH, an abnormal noise appeared under the hood. Without warning an explosion occurred. The contact managed to veer to shoulder of the road get out the vehicle to check and see what the noise was. The contact noticed flames appeared by the rear wheel on the driver side. The contact grabbed the fire extinguisher and extinguished the flames. The fire department was contacted however no report was filed.
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at 60 MPH, the vehicle began to shake uncontrollably. A knocking sound was heard from the engine, and the vehicle entered limp mode. No warning lights illuminated. The contact was able to coast the vehicle to the residence. The vehicle was later towed to the dealer, where it was diagnosed that the engine failed and needed to be replaced.
Other problems reported for the 2021 GMC Sierra 1500
- Drivetrain & axles 144 complaints
- Electrical system 78 complaints
- Fuel system 43 complaints
- Steering 34 complaints
- Brakes 25 complaints