2015 Gmc Yukon Denali problems, complaints & recalls
Most-reported problem areas: Exterior Lighting (34) · Power Train (7) · Service Brakes (4)
🧭 Reliability snapshot
Compared against other Gmc Yukon Denali model years — complaint volume vs the model's median year, recalls and severity. How we score →
🛣️ Complaints by mileage
59 NHTSA complaints that reported an odometer reading.
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (585)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-04 · PIP4902W · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Unknown Or Other 2026-07-21 · PIT5099J · Service Bulletin/Repair Instructions
pi to help diagnose a/c concern
Unknown Or Other 2026-04-01 · PIT3271Q · Service Bulletin/Repair Instructions
this preliminary information communicates information about how to determine if a wheel and tires size change is available.
Unknown Or Other 2026-03-09 · PIP6104 · Service Bulletin/Repair Instructions
this preliminary information communicates the steps on how to save a gds2 session log and upload to a technical assistance case in cx connect.
Unknown Or Other 2026-03-09 · PIP4902V · Service Bulletin/Repair Instructions
this preliminary information advises a dealer on how to email gds2 session logs into technical assistance.
Showing the 6 most recent of 585 bulletins. Search all of them free at nhtsa.gov.
What owners report
2025-08-13 · Engine And Engine Cooling · 96,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that while driving 80 mph, the vehicle hesitated, and failed to accelerate as intended while depressing the accelerator pedal. in addition, there was an abnormal knocking sound coming from underneath the passenger’s side of the vehicle. the check engine warning light was illuminated. the …”
2024-10-28 · Power Train · 100,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that while driving at undisclosed speeds, the contact heard an abnormal grinding sound, and the transmission was shifting hard. while making a turn, there was an abnormal sound coming from the vehicle. there were unknown warning lights illuminated. the contact stated that the failure was …”
2024-09-05 · Engine · 150,150 mi“the contact owns a 2015 gmc yukon denali. the contact stated while driving at approximately 20 mph, the vehicle started decelerating with a slight clunking sound coming from underneath the front passenger’s side of the vehicle. the vehicle then lost motive power. the contact coasted to the side of the road and turned off the vehicle. after waiting …”
2024-02-16 · Power Train · 102,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that while driving at an undisclosed speed, the transmission was inoperable. the contact stated that when the gear shifter was shifted into reverse, the vehicle would drive forward. the contact also stated that when the gear shifter was in neutral, the vehicle would reverse instead. the …”
2022-07-28 · Fuel System, Gasoline:storage:tank Assembly · 130,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that the fuel tank was leaking fuel. the contact had not taken the vehicle to a certified mechanic or dealer to be diagnosed or repaired. the manufacturer was not made of the failure. the approximate failure mileage was 130,000.…”
2022-04-29 · Electrical System · 75,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that while driving the air condition system was blowing hot air and then became inoperable. there were no warning lights illuminated. the vehicle was taken to the local dealer where it was diagnosed and determined that the a/c condenser and a/c control module needed to be repaired. the ve…”
2022-03-28 · Service Brakes · 115,000 mi“the contact owns a 2015 gmc yukon denali. the contact stated that while his mother was driving approximately 50 mph, the brake service warning light illuminated and the vehicle started to decelerate as if the brakes were engaged. the contact's mother was able to pull over safely and turned the vehicle off and on and was able to continue driving to …”
2020-01-26 · Electrical System · 60,000 mi“tail lights sometimes work and most of the time does not work. i see hundreds of complaints about this and nothing is being done about it! this will be my first and last time buying a gmc car. this is very dangerous and a very expensive problem to have!…”
2019-08-21 · Exterior Lighting:brake Lights · 64,000 mi“tl* the contact owns a 2015 gmc yukon denali. while reversing the vehicle, the contact was informed that the brake lights were not illuminating. however, when the vehicle was in drive, the brake lights illuminated. also, when the contact depressed the brake pedal to slow or stop the vehicle, the brake lights did not illuminate. the contact called c…”
2019-07-22 · Exterior Lighting · 119,000 mi“the passenger side brake/tail lights intermittently do not work. they work about 60 percent of the time and the other 40 percent they do not. i have read many complaints online about this issue and gm needs to step up and get it fixed. it is a safety issue.…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.