2015 GMC Denali problems
The 2015 GMC Denali has 27 complaints on file with NHTSA. The largest share (22%) concerns lighting. After that come drivetrain & axles (19%) and electrical system (15%).
At a glance
- Complaints
- 27 filed with NHTSA
- Most reported
- Lighting 22% of complaints
- Crashes and fires
- 1 and 0
- Injuries and deaths
- 1 and 0
- Typical mileage
- 50,000 miles 21 complaints with mileage
Source: NHTSA owner complaints
Where the complaints are
Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.
When problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 1 |
| 20k to 40k miles | 4 |
| 40k to 60k miles | 6 |
| 60k to 80k miles | 8 |
| 80k to 100k miles | 0 |
| 100k to 120k miles | 0 |
| 120k to 140k miles | 1 |
| 140k to 160k miles | 1 |
| 160k to 180k miles | 0 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Among the 21 complaints that report mileage, the typical (median) problem appeared at about 50,000 miles.
Safety-related details: 1 complaint mentions a crash; 1 injury reported.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2015 ranks 1st most-complained-about out of 5 model years of the GMC Denali with enough data (26 complaints in that window).
What owners wrote
A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.
Tl* the contact owned a 2015 GMC denali. The contact stated that while their husband was driving approximately 45 MPH, when the traffic came to a sudden stop causing the contact to apply the brakes to the vehicle. The driver had to depress the braking pedal excessively, however, the brakes did not stop and the brakes were floored. The vehicle ended up rear ending the vehicle in front. The air bags did deploy. The vehicle was towed and totaled. A police report was filed.
Rear taillights have moisture in them. The moisture is constant in one and intermittent in the other. Both have been replaced once by dealer 3 months ago. Problem still exists
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.
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.
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.