2020 GMC Sierra Denali Recalls
No NHTSA recalls on record for the 2020 GMC Sierra Denali. That means NHTSA has no open safety campaign for this vehicle — it does not guarantee the absence of problems. Owners have filed 10 complaints with NHTSA, most often about the engine. Last updated July 5, 2026.
Complaints by component
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal information removed.
“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 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 while driving 65 mph at night, the vehicle stalled and the “shift to neutral and restart vehicleâ€� message was displayed. The contact was unable to restart the vehicle and was unable to visibly see the roadway. The contact was able…”
“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…”
“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…”
“Two issues broken valve spring caused engine to shut down, second service brake, brake failure light, service esc, service trailer brake messages causing brake failure”
“Two issues broken valve spring caused engine to shut down, second service brake, brake failure light, service esc, service trailer brake messages causing brake failure”
“I noticed several spots of oil on my driveway, I then inspected the underside of the engine (l5p) and noticed oil dripping from several bolts and lines. My vehicle, a 2020 2500hd denali diesel, has only 2,200 miles on it from normal highway driving.”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2020 GMC Sierra Denali as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.