2015 GMC Denali Engine Problems
- Complaints
- 1about this part
- Share
- 6%of 18 total for the year
- Median mileage
- 64,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2015 GMC Denali, 6% of the 18 complaints for this model year. Where a mileage was given, the median is 64,000 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.
“This has happened several time in the city crossing an intersection usually at slow speed braking and turning and all the sudden I lose everything. No steering electrical and braking. The park assist will sometimes start going off like crazy just before it happens, but not all the time. Put in park and open the door it comes back on. Then says roll down drivers side window and then back up. At on time I did have it happen on the highway. I was getting ready to pass and giving it gas and everything shut down for a split second and then took off again. …”
NHTSA complaint #11351977, filed 2020-08, 64,000 milesRelated service bulletins
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10201098Dec 1, 2015OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
- 10190503Dec 1, 2015OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification
Engine: 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 complaintsFuel system
1 complaintsOther or unknown
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 27, 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