2021 GMC Sierra 1500 electrical system problems
78 complaints about electrical system have been filed for the 2021 GMC Sierra 1500, which is 9% of all its NHTSA complaints. It is the 3rd most reported problem area for this model year.
At a glance
- Complaints
- 78 9% of this year's complaints
- Typical mileage
- 22,000 miles 18 complaints with mileage
- Crashes and fires
- 0 and 3
- Injuries and deaths
- 1 and 0
Source: NHTSA owner complaints
When electrical system problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 8 |
| 20k to 40k miles | 3 |
| 40k to 60k miles | 1 |
| 60k to 80k miles | 4 |
| 80k to 100k miles | 2 |
| 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 18 electrical system complaints that report mileage, the median is about 22,000 miles, and 67% were reported before 60,000 miles.
These complaints mention 3 fires, 1 injury.
What owners wrote
Returned home after some shopping. Parked truck in drive way. Approximately 5 minutes after returning home my wife saw truck smoking from under the hood. Within another minute or two there were visible flames coming from the back edge of the hood. We called 911. Within 5 minutes the entire front end of the truck was engulfed in flames. The fire department arrived and put out the fire but the entire front and cab of the truck was destroyed.
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 50-65 MPH on an incline, the contact believed that the transmission was slipping or there was a misfire coming from the engine. The contact stated that the vehicle failed to restart automatically after the engine AUTO Start/Stop system was engaged after a complete stop. Additionally, the contact stated that after driving for a while, the vehicle went into LIMP Mode.
Other problems reported for the 2021 GMC Sierra 1500
- Engine 370 complaints
- Drivetrain & axles 144 complaints
- Fuel system 43 complaints
- Steering 34 complaints
- Brakes 25 complaints