2020 GMC Sierra 1500 problems and complaints
Owners have filed 484 complaints with NHTSA about the 2020 GMC Sierra 1500. The most-reported areas: Engine (245), Power Train (99), Electrical System (81).
Key takeaways
- 484 owner complaints on file with NHTSA.
- 12 involve a crash, 5 a fire, 13 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 245 | 51% |
| Power Train | 99 | 20% |
| Electrical System | 81 | 17% |
| Service Brakes | 53 | 11% |
| Unknown Or Other | 45 | 9% |
| Steering | 38 | 8% |
| Fuel/Propulsion System | 27 | 6% |
| Engine And Engine Cooling | 21 | 4% |
| Suspension | 18 | 4% |
| Forward Collision Avoidance | 14 | 3% |
| Structure | 13 | 3% |
| Vehicle Speed Control | 12 | 2% |
One complaint can name several components, so shares add up to more than 100%.
Parts for the 2020 GMC Sierra 1500
GarageDex's verified specs for this car. Each Buy button searches Amazon for that exact part.
- Battery
- Engine oil
- Wiper blades
- Headlight bulb
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| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2020 GMC Sierra 1500 PU/CC 4WD | 4/5 | 4/5 | 5/5 | 4/5 |
| 2020 GMC Sierra 1500 PU/EC 4WD | 5/5 | 4/5 | 5/5 | 4/5 |
| 2020 GMC Sierra 1500 PU/RC 4WD | 5/5 | 4/5 | 5/5 | 4/5 |
| 2020 GMC Sierra 1500 PU/CC 2WD | 4/5 | 4/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Engine - filed 2026-10-28
6.2 liter engine failed at 59,300 miles. Being replaced right now with remanufactured engine. 2020 GMC Sierra is not part of recall but others have had problems as well
Steering,engine - filed 2026-10-23
This morning it seems as if my 6.2L GM motor threw a rod. All the initial sounds and check engine information point toward that. I will be taking it to a dealer to confirm the issue. Data center driving ability and sounds indicate steering was affected as well or is somehow connected.
Power Train,engine - filed 2026-10-23
I own a 2020 GMC sierra AT4. It has developed a shudder when cruising on the highway or driving in town around 1500rpm. I believe it is coming from the transmission. A local shop mentioned the torque converter. The shudder feels like a delay in power and makes it difficult to hold speed or accelerate when needed.
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More for the 2020 GMC Sierra 1500
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.