2015 GMC Denali Problems
- Complaints
- 18filed with NHTSA
- Median mileage
- 56,000miles, 14 complaints with mileage
- Recalls
- 0campaigns on record
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
Sources: NHTSA records for the 2015 GMC Denali (complaints, recalls, investigations). Report an error
NHTSA recorded 18 consumer complaints for the 2015 GMC Denali. The part named most often is exterior lighting, with 6 complaints (33% of the total), followed by transmission and drivetrain (5) and electrical system (4). 14 of the complaints include a mileage, and 36% of those were filed for vehicles with under 50,000 miles; the median is 56,000 miles. Of all complaints, 1 involved a crash, 1 an injury, according to the filers. NHTSA lists 0 recall campaigns and 115 technical service bulletins for this model year. Exterior lighting complaints overlap with 2 technical service bulletins filed under the same part. Transmission and drivetrain complaints overlap with 15 technical service bulletins filed under the same part.
This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.
Which parts are reported most
Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.
- Exterior lighting6 33%
- Electrical system4 22%
- Brakes2 11%
- Steering2 11%
- Engine1 5.6%
- Fuel system1 5.6%
- Other or unknown1 5.6%
- Body and structure1 5.6%
Also reported: Suspension (1), Vehicle speed control (1), Visibility (wipers, defrost, mirrors) (1).
Example complaints
Exterior lighting: “We bought our 2015 Denali 1 year ago and have approx 50,000 miles and the passengers side tail light is out. After researching taillight problems for my make and model this seems to be a very common issue. This should be considered as a recall but when looked into, I see it is not. Its a shame to spend so much money on a vehicle to have the tail light out at 3 years (after factory warranty is already out) and you have to replace the whole tail light instead of one piece.”
NHTSA complaint #11172670, filed 2019-01, 50,000 milesTransmission and drivetrain: “My truck has 30,000 miles and has the 'chevy shudder'. Why is this not a recall? Gmc wants me to pay out of pocket for the transmission flush. When I am driving the truck it begins shuddering and shaking through certain shift points.”
NHTSA complaint #11338832, filed 2020-07, 30,000 milesElectrical system: “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 milesBrakes: “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 milesMileage when problems were reported
36% of the 14 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 44,415 and 72,000 miles.
Complaints by year filed
Trend: falling. Complaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
Recalls and investigations
NHTSA lists no recall campaigns for the 2015 GMC Denali in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by VIN at nhtsa.gov/recalls.
Technical service bulletins
TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 115 on record; the latest 10 are shown.
- 10239124Jun 30, 2023Body and structure. This service bulletin provides information on Paintless Dent Repair Process.
- 10239101Jun 30, 2023Engine cooling. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
- 10239103Jun 29, 2023Transmission and drivetrain. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test.
- 10239102Jun 29, 2023Electrical system. The 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 diagnostic methods to…
- 10238190Jun 14, 2023Equipment. This service bulletin describes the U.S. Dealer Special Tool Loan Program process.
- 10237960Jun 8, 2023Equipment. This service bulletin provides information on submitting quality Photos of Various Vehicle Concerns to the GM Technical Assistance Center (TAC).
- 10237846Jun 7, 2023Transmission and drivetrain, Engine cooling. This service bulletin provides information to dealership personnel on automatic transmission shift and engine driveability concerns and/or MIL ON due to aftermarket oil bath air filter use.
- 10237841Jun 1, 2023Equipment. This service bulletin provides information for dealers/technicians on When and How to Submit a Field Product Report (FPR) (U.S. Dealers Only).
- 10237387May 30, 2023Transmission and drivetrain. This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk…
- 10237340May 22, 2023Wheels. This service bulletin provides information for dealers/technicians on Vibration Shortly After Tires are Mounted/Preventing Vibration from Wheel Slip (Tire Sliding on Wheel).
Other model years of the GMC Denali
| Year | Complaints | Median mi | Recalls | Crash ★ | MPG | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|---|
| 2015 | 18 | 56,000 | 0 | — | — | — | Falling |
| 2014 | 5 | 67,000 | 0 | — | — | — | Not enough data |
| 2013 | 5 | 24,400 | 0 | — | — | — | Not enough data |
| 2012 | 6 | 82,000 | 0 | — | — | — | Not enough data |
| 2011 | 11 | 114,239 | 0 | — | — | — | Not enough data |
| 2010 | 5 | 91,325 | 0 | — | — | — | Not enough data |
| 2003 | 32 | 50,000 | 0 | — | — | Not compared (before 2008) | Stable |
| 2002 | 23 | 36,000 | 1 | — | — | — | Stable |
| 2001 | 22 | 64,300 | 1 | — | — | — | Stable |
| 2000 | 21 | 87,702 | 1 | — | — | — | Stable |
| 1999 | 14 | 82,500 | 1 | — | — | — | Not enough data |
Frequently asked questions
How many NHTSA complaints does the 2015 GMC Denali have?
NHTSA recorded 18 consumer complaints for the 2015 GMC Denali as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
What part of the 2015 GMC Denali is reported most often?
Exterior lighting is named most often, in 6 complaints (33% of the total), followed by transmission and drivetrain with 5.
Has the 2015 GMC Denali been recalled?
NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.
At what mileage are problems with the 2015 GMC Denali reported?
Among the 14 complaints that include a mileage, the median is 56,000 miles and the middle half falls between 44,415 and 72,000 miles; 36% were filed for vehicles with under 50,000 miles.
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.
Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.