2015 GMC Denali Electrical system Problems
- Complaints
- 4about this part
- Share
- 22%of 18 total for the year
- Median mileage
- 50,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the electrical system of the 2015 GMC Denali, 22% of the 18 complaints for this model year. Where a mileage was given, the median is 50,000 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.
“While thankfully driving in the slow lane on the interstate in st. Louis my stability light came on the truck then slowed down on its own then went into four-wheel-drive then revved up to 6000 rpms then every service light came on on the dash when pulling to the side of the road the car then would not drive forward it stayed in neutral regardless of gearshifting it then began to cycle through all of the service request for the vehicle. …”
NHTSA complaint #11290421, filed 2019-12, 39,000 miles“Letter from senator feinstein inquiry on behalf of constituent in regards to having problems with Gmc sierra Denali pickup 2015. The consumer stated the vehicle has had multiple issues with the suspension, transmission, and electronics. The vehicle would ride rough and the stability light would illuminate. The transmission needed to be replaced. The electronic dash blacked out and would not function, the settigns switched on their own. The vehicle died and shifted dangerously. The manufaturer was notified. The consumer a fix was unavailable. Updated 08/09/2017”
NHTSA complaint #11014368, filed 2017-08Related service bulletins
- 10239102Jun 29, 2023The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other…
- 10235398Apr 4, 2023This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- 10234144Mar 20, 2023This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
- 10233358Mar 10, 2023This service bulletin provides information on AGM batteries that require less frequent charging in storage.
- 10225615Oct 19, 2022This service bulletin provides information on Module Harvesting.
- 10222841Sep 27, 2022This preliminary information (PI) provides information om Service Programming System (SPS) Error Codes (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or…
- 10222776Sep 16, 2022The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other…
- 10190320Oct 1, 2017IPC Odometer Programming Method Quick Reference Guide
- 10158895Jun 22, 201715086A - Customer Satisfaction Program. On certain passenger cars and light duty trucks, equipped with Gen 10 OnStar®, the embedded phone flash memory chip may become corrupted…
Electrical system: other model years
Other parts of the 2015 GMC Denali
6 complaintsTransmission and drivetrain
5 complaintsBrakes
2 complaintsSteering
2 complaintsElectronic stability control
1 complaintsEngine
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