2020 GMC Sierra 2500 problems
The 2020 GMC Sierra 2500 has 115 complaints on file with NHTSA. The largest share (22%) concerns drivetrain & axles. Next are brakes (11%) and electrical system (11%).
At a glance
- Complaints
- 115 filed with NHTSA
- Most reported
- Drivetrain & axles 22% of complaints
- Crashes and fires
- 1 and 7
- Injuries and deaths
- 1 and 0
- Typical mileage
- 29,000 miles 34 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 | 16 |
| 20k to 40k miles | 2 |
| 40k to 60k miles | 0 |
| 60k to 80k miles | 3 |
| 80k to 100k miles | 0 |
| 100k to 120k miles | 8 |
| 120k to 140k miles | 4 |
| 140k to 160k miles | 0 |
| 160k to 180k miles | 1 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Of the 34 complaints that include odometer readings, half describe a problem before roughly 29,000 miles.
Safety-related details: 1 complaint mentions a crash; 7 complaints mention a fire; 1 injury reported.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2020 ranks 2nd most-complained-about out of 26 model years of the GMC Sierra 2500 with enough data (107 complaints in that window). It is also covered by 9 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.
Tl* the contact owns a 2020 GMC sierra 2500. The contact stated that upon driving over a hill at 45 MPH, a vehicle was stopped in the middle of the road. In an effort to avoid hitting the vehicle, the contact drove the vehicle off the road and into a concrete culvert at the end of the ravine. The air bags did not deploy upon impact. The authorities were called to the scene and the contact was rushed to a local hospital via ambulance.
Tl* the contact owns a 2020 GMC sierra 2500. The contact stated that while driving, he noticed smoke entering the vehicle through the air vents. The contact coasted to the side of the road, exited the vehicle safely with his passenger, upon opening the hood noticed that the whole engine compartment was on fire. The contact stated that the fire department arrived but was unable to extinguish the flames as they allowed the vehicle to burn until the fire self extinguished.
Vehicle was parked in a school parking lot. Rear Trailer Harness and modules in back short circuited causing an electrical fire that expanded to the driver’s taillight rear bumper, and bed of truck.
The vehicle pulls to the right or left into oncoming traffic within 800 feet or sooner depending on speed. This occurs on city streets or interstate. GM and GM approved dealerships say this is done to GM specifications. The first 7000 miles, it didn't pull. After GM shop aligned, and 3 months later, it is unsafe to operate.
The contact owns a 2020 GMC Sierra 2500. The contact stated while driving 60 MPH, the vehicle independently slowed and dramatically decelerated. The vehicle returned to normal functionality, but the failure became a regular occurrence. The contact stated that when the failure occurred, the gear shifter position indicator light flashed, and once the vehicle returned to normal functionality, the light remained solid. No warning lights were illuminated.