2020 GMC Sierra Denali Problems, Complaints & Recalls
- Compared with other Sierra Denali years
- About as many complaints as other years 10th of 18 for complaints
- Safety recalls
- None on file
- NHTSA crash rating
- Not rated
Owners have filed 11 complaints with NHTSA about the 2020 GMC Sierra Denali. That ranks 10th out of 18 Sierra Denali model years for complaints. The most reported problem area is engine (6 complaints, 55%), typically at around 20,000 miles. There are no safety recalls on file for this model year.
- 11owner complaints
- 0safety recalls
- 0NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2020 GMC Sierra Denali problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Engine | 6 | 55% | 20,000 | — | — |
| Forward Collision Avoidance | 2 | 18% | 52,850 | — | — |
| Service Brakes | 2 | 18% | 1,675 | — | — |
| Electrical System | 1 | 9% | — | — | — |
| Engine and Engine Cooling | 1 | 9% | 190,000 | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
Complaints by year received
2020 GMC Sierra Denali recalls (0)
No safety recalls are on file for the 2020 GMC Sierra Denali.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
The contact owns a 2020 GMC Sierra Denali. The contact stated that while driving with Adaptive Cruise Control set to 55 MPH, the vehicle suddenly accelerated. The contact depressed the brake pedal to disengage the Adaptive Cruise Control settings, preventing the vehicle from crashing into the…
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 owns a 2020 GMC Sierra Denali. The contact stated that while stopped at a traffic light with the brake pedal depressed, the vehicle shut off unexpectedly. There was no warning light illuminated. The contact made several attempts to restart the vehicle; however, the vehicle failed to…
The contact owns a 2020 GMC Sierra Denali. The contact stated while driving 75 MPH, the Adaptive Cruise Control feature became inoperable. The contact stated that when the vehicle got too close to another vehicle, the Adaptive Cruise Control feature failed to activate as designed. The vehicle was…
Other GMC Sierra Denali years
See all GMC Sierra Denali problems by year, every GMC model, or the GMC VIN decoder.
Similar GMC models
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Frequently asked questions
What are the most common problems with the 2020 GMC Sierra Denali?
Owners most often report engine, forward collision avoidance, service brakes problems. The top one, engine, accounts for 6 complaints.
Was there a recall on the 2020 GMC Sierra Denali?
No safety recalls are on file for this model year.
Was the 2020 GMC Sierra Denali a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other Sierra Denali model years, the 2020 has about as many complaints as a typical year. Always get a pre-purchase inspection and check the VIN for open recalls.