What 977 owners told NHTSA about the 2015 GMC Yukon Denali Xl 1500

Tail lights keep going out and have been replaced

NHTSA ODI 11470980

Rear warning won’t maintain staying on. Keeps turning itself off or something.

NHTSA ODI 11470982

Both taillights and brake lights have gone out within 4 months of each other.

NHTSA ODI 11470841

" Service Trailer Brake System" 5 times a week and sometimes more than that ....on average 5 times

NHTSA ODI 11468790

LED brake light wiring comes undone causing brake lights to go out.

NHTSA ODI 11467605

My GMC Yukon Denali xl has a defective transmission from the manufacturer thousands of other General Motors customers are experiencing the same issues since 2015 General Motors has still failed to issue a recall. This problem cause the truck to leap, lunges and sometimes accelerate as well as hard down shifts which causes sudden stops this also causing severe damage over time. There’s also defective paint peeling and fading from the manufacturer

NHTSA ODI 11464891

A message keeps popping up, “trailer brake system” it is poor wiring on GMC part. I did research on this and looked it up and other people had similar issues which can be very severe if driver continues to use after this message pops up. The message is so continuous that it could distract the driver, which could lead to a fatal accident.

NHTSA ODI 11464642

My transmission has issues shifting between 1st and 2nd gear. It has for several years. I have brought it into the dealership several times. They fix a part but when I get the car back, it’s still experiencing the same problem. When Accelerating, the car jerks between 1st and 2nd gear right around 10 miles per hour. It is a hard jerk that feels like you’ve been hit from behind.

NHTSA ODI 11464152

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 vehicle was not repaired. The manufacture was not notified of the failure. The approximate failure mileage was 75,000.

NHTSA ODI 11462781

brake pedal takes much more effort to push I was parking the car and thankfully was only going about 2 mph because I had to press the brakes with two feet to stop it from hitting the car in front of me. We just arrived from a 2 hour trip and this happened at the end of our trip. Lucky it wasn’t on the highway or with a pedestrian in front of me. No injuries

NHTSA ODI 11461422

The bolt connecting the lapbelt to the frame fell out as my adult daughter was buckled in the seat.

NHTSA ODI 11460428

While I was in line at the gas station to get gas, I moved up because the car I front of me had done so. After moving up a bit, I pressed my feet on the brake but the pedal was very stiff and the breaks did not hardly engage. I almost ran into the vehicle in front of me. This was very scary. So I called for a tow truck to pick me up but after a while they didn’t show. I started my car up to see if the the brakes engaged and they did. So I slowly and carefully drove myself to the GMC dealership in Southaven, MC which was 0.3 mile away from the gas station. The GMC dealership said that it was vacuum pump that was at fault and admitted it was a recall for this. But they said since my truck has already been serviced for this recall that I would have to pay to get it fixed. This is absolutely absurd. If the issue was not fixed properly in the first place, why would I be responsible for getting it fixed the second time?

NHTSA ODI 11460282

I was driving my 2015 GMC Yukon a light illuminated on the dashboard. I pulled over at a Convenience store. Got my children out of the car. Once out of the vehicle I noticed smoke. Within the matter of 2 mins the truck was engulfed in flames.

NHTSA ODI 11458935

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 her destination. The brake failure persisted. The contact had not taken the vehicle to a local dealer. The vehicle was not diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 115,000.

NHTSA ODI 11458720

The service brake assist warning message keeps appearing. Additionally, when the vehicle is completely stopped, but then you let off the brake to roll forward a little bit (such as at a stoplight), when you press the brake again it does not have stopping power. Must pump the brake several times as the vehicle rolls. This is particularly dangerous in downhill stops. It appears there is a safety recall on the power assist vacuum for brakes on 2015 GMC Yukon XL, but for some reason, my VIN is not included in the recall. I would like to know what it would take to include my VIN in the recall because it is the same year, make, and model.

NHTSA ODI 11458038

The contact owns a Recaro car seat, Model Type: Young Sport Hero, Model Number: N/A, Manufactured Date: N/A. The car seat was being utilized in a 2015 GMC Yukon. The contact stated that her child was able to climb out of his car seat since there was no clasp on the harness to restrain him. The contact had to use the vehicle’s seat belt to restrain the child securely. The manufacturer was made aware of the failure and advised the contact to not let her child climb out of his safety seat. The car seat was not repaired or replaced.

NHTSA ODI 11456279

The contact owns a 2015 GMC Yukon. The contact stated while driving 40 MPH, he had to depress the brake pedal with extra force to stop the vehicle. The contact stated that the brake assist warning light was illuminated. The contact was able to continue to drive to his destination. The contact took the vehicle to an independent mechanic, where the repair was being performed. The contact called the local dealer and made them aware of the failure. The vehicle was not diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 73,000.

NHTSA ODI 11455667

Transmission Code P0700 and P0796 ( pressure control) I was on the Interstate and my 2015 GMC YUKON SLT Engine locked up and shift down to 2nd gear. Causing other cars to almost hit me from behind and possibly causing an accident. I had to quickly veer off on the side of the road so that they wouldn’t hit the back of me. Immediately my engine light came on. Didn’t have this problem prior to the breakdown. Brought it to GMC dealership they told me my torque converter was bad along with Computer TCM and Valve body. They said I need a new transmission. My SUV have 132k miles. I called around at other transmission shops and they ALL said they are getting 3-4 GMC YUKONS in to fix a week and knew exactly what the problem was with SUV. They couldn’t understand why GMC wasn’t correcting the problem. Also, last year had to replace the Cam Shaft, Lifters and Catalytic Convertor that’s was $6000 now they tell me $5500 for Transmission. That’s $12000+ in repair in lease than 1.5 years. Never have I had this much major problem on a vehicle. This is a major safety issue especially on interstate.

NHTSA ODI 11451007

Trailer Brake connection gives errors. Has been fixed multiple times with dealer with error still occurring

NHTSA ODI 11449860

Driver Rear brake led light not working

NHTSA ODI 11449769

The contact owns a 2015 GMC Yukon Denali XL. The contact stated that while driving at an undisclosed speed, gasoline would leak out of the fuel tank. The vehicle was taken to the dealer; however, the vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure. The contact related the failure to TSB Number: 14858 (High-Pressure Fuel Pump). The failure mileage was approximately 126,000.

NHTSA ODI 11449781

Brake lights - left brake light works intermittently, and often does not work. 3rd brake light (top center) has quit working. Both are issues with cracks in the circuit board, which googling has shown to be a known issue. Faulty, poorly designed or constructed parts!

NHTSA ODI 11448167

Both my tail lights have failed. Dealer wants insane amount of money for new ones, so I opened up the lights and there is an obvious design flaw in the lights, to me it seems intentional at worst, incompetent at best. I am an electrical engineer, and there is no reason they should put a friction connection in the LED power bar, it is a glaring design flaw. Also having steering assist issue at low speed which was an issue that was supposed to be fixed in a previous recall service, but it is still malfunctioning.

NHTSA ODI 11445923

Last week, the power brake assist began fading away intermittently at low speeds, and caught my wife off guard in a grocery store parking lot when she pulled into a parking space and the brakes were not available. She had to plant both feet on the brake pedal in a panic stop before crashing into the car parked in front of her, and has since never driven the vehicle. This is a danger, and is potentially life threatening.

NHTSA ODI 11444423

Brake Assist Light came on. Pierre brakes failed and had to press down hard manually to get the car to stop. Felt antilock breaks were assisting. We felt very unsafe. It’s very scary.

NHTSA ODI 11444482