2015 GMC Denali Other or unknown Problems
- Complaints
- 1about this part
- Share
- 6%of 18 total for the year
- Median mileage
- 62,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the other or unknown of the 2015 GMC Denali, 6% of the 18 complaints for this model year. Where a mileage was given, the median is 62,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Have had my vehicle at the shop for transmission issues several times. Two of the times, issues were duplicated and parts replaced, but same issues continue as soon as I get it back. My complaint when I take it in is always the same. Normally when I accelerate from a dead stop forward or reverse, the transmission makes a thumping noise. It has steadily gotten worse. A lot of times now if I take my foot off gas for a second, at faster speeds, and then put foot right back on gas, it makes the same thumping noise and sometimes a grinding noise like it's stuck between gears. …”
NHTSA complaint #11319618, filed 2020-03, 62,000 milesRelated service bulletins
- 10235798Apr 25, 2023This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
- 10234621Apr 6, 2023This Warranty Administration bulletin provides information on Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only).
- 10232283Feb 17, 2023This PI provides information on Rear and Side Tempered Glass Spots (Quench Marks) and that they are a normal characteristic.
- 10210194Apr 5, 2022This informational bulletin provides information on a guide to help reduce repeat visits for the same customer concern.
- 10215770Feb 1, 2022Information.
- 10201115Dec 1, 2015OnStar Voice Fallback Number Update
Other or unknown: other model years
Other parts of the 2015 GMC Denali
6 complaintsTransmission and drivetrain
5 complaintsElectrical system
4 complaintsBrakes
2 complaintsSteering
2 complaintsElectronic stability control
1 complaintsEngine
1 complaintsFuel system
1 complaintsBody and structure
1 complaintsSuspension
1 complaintsVehicle speed control
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 2015 GMC Denali
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology