2015 GMC Sierra DenaliProblems, recalls & complaints
NHTSA has logged 22 owner complaints about the 2015 GMC Sierra Denali, most often about the service brakes. It has no vehicle safety recalls on record.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through December 1, 2025. Updated daily.
Where the 2015 GMC Sierra Denali has problems
22 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Service brakes | 7 | 0 |
| Power train | 5 | 0 |
| Electrical system | 3 | 1 |
| Fuel system, diesel | 1 | 0 |
| Engine and engine cooling | 1 | 0 |
| Seats | 1 | 0 |
| Engine | 1 | 0 |
| Steering | 1 | 0 |
| Structure | 1 | 0 |
| 1 other systems | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
2015 GMC Sierra Denali recalls and how many were fixed
No vehicle safety recalls are on record for this model year.
2015 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
NHTSA defect investigations
Federal investigations that included the 2015 GMC Sierra Denali, and the recalls they led to.
- Desiccated Air Bag Inflator RuptureOpen
What Sierra Denali owners report
Recent service brakes complaints filed with NHTSA, shortened. Personal details are removed.
4 MONTHS AGO THE DISPLAY PORTRAYED A MESSAGE STATING, TRAILER BRAKE WARNING, HAVE SYSTEM CHECKED. SINCE THAT TIME I HAVE ATTEMPTED ON NUMEROUS TO HAVE MY VEHICLE CHECKED. BUT AS OF THIS DATE I HAVE NOT BEEN TO HAVE ANY DEALERSHIP LOOK AT MY VEHICLE. I HAVE BEEN TOLD BY DEALERSHIP THAT THE VEHICLE…
I WAS BACKING UP AT VERY LOW SPEED THE BRAKE PEDAL GOT VERY HARD AND THE VEHICLE ACTED LIKE IT DID NOT WANT TO STOP I HAD TO KEEP PUSHING EXTREMELY HARD ON TO THE BREAK TO GET THE VEHICLE TO STOP I TRIED IT AGAIN IN DRIVE AND THE VEHICLE DID THIS EXACT SAME THING THIS TIME I NOTICED AFTER PAYING…
HARD BRAKE PEDAL WITH INCREASED EFFORT NEEDED TO DEPRESS THE BRAKE PEDAL. FEELS LIKE TRUCK WILL NOT STOP. HAD TO HAVE TRUCK TOWED. REPORTED BACK ON 11-24-18 TO NHTSA: ( #1115347). BRAKE VACUUM PUMP WAS REPLACED @ GM DEALER ON 11-14-18, SAME SITUATION HAPPENED AGAIN ON 02-19-19. GM TSB # PIT5361D…
Own a 2015 Sierra Denali?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.