2020 GMC Sierra DenaliProblems, recalls & complaints
NHTSA has logged 11 owner complaints about the 2020 GMC Sierra Denali, most often about the engine. It has no vehicle safety recalls on record.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through September 14, 2026. Updated daily.
Where the 2020 GMC Sierra Denali has problems
11 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Engine | 6 | 0 |
| Forward collision avoidance | 2 | 0 |
| Service brakes | 2 | 0 |
| Electrical system | 1 | 0 |
| Engine and engine cooling | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
2020 GMC Sierra Denali recalls and how many were fixed
No vehicle safety recalls are on record for this model year.
2020 vs. every other Sierra Denali year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Sierra Denali median. How we score
- Avoid
- Caution
- Solid
- Best
- Not rated
What Sierra Denali owners report
Recent engine complaints filed with NHTSA, shortened. Personal details are removed.
The contact owned a 2020 GMC Sierra Denali. The contact stated that while the vehicle was parked, there was an abnormal knocking sound coming from the engine compartment. The check engine warning light was intermittently illuminated. The vehicle was taken to a dealer; however, the cause of the…
The contact owns a 2020 GMC Sierra 1500 Denali. The contact stated that while parking the vehicle, there was an abnormal grinding sound coming from the engine. There was no warning light illuminated. The local dealer was contacted about the failure; however, the vehicle was not diagnosed or…
The contact's father owns a 2020 GMC Sierra Denali 3500. The contact stated that while his father was driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer and diagnosed with a cylinder #1 misfire. The vehicle was repaired; however, the…
Own a 2020 Sierra Denali?
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