2015 GMC Yukon Denali XL: common problems

Owners of the 2015 GMC Yukon Denali XL filed 65 complaints with NHTSA, most often about exterior lighting and electrical system. Details by component below, with sources.

Key figures

Owner complaints: 65

What fails most often

1 Exterior lighting 55% of all complaints
2 Electrical system 25% of all complaints
3 Powertrain 14% of all complaints
4 Suspension 8% of all complaints
5 Engine 6% of all complaints
6 Steering 5% of all complaints
7 Vehicle speed control 5% of all complaints
8 Service brakes 3% of all complaints

Circle size and colour show each component’s share of NHTSA complaints. Schematic only, not a drawing of the exact model.

Exterior lighting: 36 complaints (55% of all).
Electrical system: 16 complaints (25% of all).
Powertrain: 9 complaints (14% of all).
Suspension: 5 complaints (8% of all).
Engine: 4 complaints (6% of all).

Symptoms owners describe

How many of the 65 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).

headlights and tail lights27 · 42%
vibration7 · 11%
A/C or heater6 · 9%
warning lights, check engine5 · 8%
jerking, harsh shifts3 · 5%
knocking, grinding or other noise3 · 5%
stalls while driving2 · 3%
unintended acceleration2 · 3%
windows, sunroof2 · 3%
rear-view camera1 · 2%

Components owners complain about

Component	Owner complaints	involving a crash	Technical service bulletins (TSB)
Exterior lighting	36	0	0
Electrical system	16	0	0
Powertrain	9	0	0
Suspension	5	0	0
Engine	4	0	0
Steering	3	0	0
Vehicle speed control	3	0	0
Service brakes	2	0	0
Structure	2	0	0
Wheels	2	0	0
Electronic stability control	1	0	0
Engine and cooling	1	0	0
Fuel/propulsion system	1	0	0
Fuel system	1	0	0

What owners report

Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.

The contact stated while driving approximately 30-35 MPH, the engine and oil warning lights illuminated, and the contact pulled over. There was no indication of oil leaking on the ground. The contact had her son-in-law, an independent mechanic to check the oil and it was determined that the oil level was low.
Engine and cooling · 2025-06-16 · NHTSA complaint #11667092
The contact related the failure to TSB Number: 14858 (High-Pressure Fuel Pump). The failure mileage was approximately 126,000.
Fuel system · 2022-02-01 · NHTSA complaint #11449781
The contact stated that the passengerâs side taillight failed to illuminate intermittently while depressing the brake pedal. Over time, the driverâs side taillight also would fail to illuminate with the brake pedal depressed.
Exterior lighting · 2021-07-28 · NHTSA complaint #11426853
The passenger side taillight started 'going out' right after the warranty expired-meaning, it would work off and on at various times. Then the drivers side taillight has started doing the same thing. This is a known issue with the gmc taillights and yet gmc has yet to recognize any issue.
Exterior lighting · 2019-06-26 · NHTSA complaint #11222648
The wheels have corrosion and sharp edges have started to form. These sharp edges are putting pressure on the the tires causing them to lose air. We were required to purchase new wheels as the only solution. Wheels should last the life of a vehicle, not four years.
Suspension · 2019-06-20 · NHTSA complaint #11221505
My yukon makes very hard shifts when accelerating and decelerating. The tcm was reprogrammed after vehicle shut off on the high way last november. Now the truck shudders between 25 and 45mph especially when climbing or filled with passengers. Vibration can be felt through the cabin.
Powertrain · 2019-06-10 · NHTSA complaint #11219096
Dealership has taillight on back order so a replacement isnt even available. Dealership wants $675 just for the part that cant even be ordered. Dangerous to drive the vehicle with no solution available.
Exterior lighting · 2019-06-09 · NHTSA complaint #11218774
While attempting to shift the vehicle from park into drive, the transmission made a hard clunking sound. Also, while driving between 30-50 mph, the vehicle vibrated abnormally.
Powertrain · 2019-05-29 · NHTSA complaint #11210540

When owners complained

NHTSA complaints by filing year. The peak shows at what age the problems show up most.

20178
201829
201925
20211
20221
20251

Comparison

By complaint count this model year ranks 4,606 of 36,656 model years in the NHTSA data (top 13% most complained about).

On average one model year of the Yukon Denali XL has 31 complaints (16 years in the data). This year has 65, above average.

What to check before buying

Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Suspension. Wheel alignment, control arms, subframe, even tire wear.

Other years of this model

Questions and answers

What are the most common problems with the 2015 GMC Yukon Denali XL?

Owner complaints to NHTSA most often mention: exterior lighting, electrical system, powertrain. Total complaints: 65. The most frequent symptoms in complaint texts: headlights and tail lights (42%), vibration (11%), A/C or heater (9%).

How many service bulletins (TSB) were issued for the 2015 GMC Yukon Denali XL?

NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.

Should I buy a 2015 GMC Yukon Denali XL from a US auction?

Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.

Other 2015 models

Read also

Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.