The right rear brake light and running light has gone out. Appears to be a common problem. You can't replace the bulb like older cars. You need to replace the whole brake assembly for $700!!! GM knows about the common issue but is not covering it.

- El Dorado Hills, CA, USA

When using steering to turn around, turn into a parking space or back in, 'parking assist off' show up on the instrument panel, then the steering wheels locks and the car turns off while still engaged in drive. Sometimes 'brake assist' comes on first. Extremely dangerous. When this happens, unable to turn steering wheel. Car shuts down and doors lock. I have to put it in park and restart the car. Sometimes it does it more than once after restarting the car. I have taken it to a GMC dealer for evaluation and repair. Has happened at least 6 different times. When driving, I am always afraid to make sharp turns. However, it has only happened at slow speeds when trying to turn in to a driveway or turn around such as in a parking lot. Consumer stated after taking my car to GMC dealer and being told my vehicle needed a sortware update, my car went a few weeks without an episode until this evening at 7:52pm eastern time, while backing in to my driveway. The steering wheel kicked in place and the vehicle turned off and doors locked, leaving me out in the street, unable to control my car for seconds. Updated 10/18/18 updated 10/26/18

- Farmington, MI, USA

Brake lights tail lights quit working

- Charleston, SC, USA

The contact owns a 2015 GMC Yukon. While driving 65 mph, the brake pedal was depressed, but the brake lights, tail lights, and the interior rear brake light flickered. The vehicle was taken to delano Chevrolet Buick GMC (600 1st ave, delano, ca 93215, 661-735-4974) to be diagnosed and repaired. The diagnosis results were unavailable. The manufacturer was not notified of the failure. The failure mileage was approximately 92,000.

- Wasco, CA, USA

Rear tail light not working

- Elmsford, NY, USA

Tail light led stopped working. Connection failed

- Ramona, CA, USA

Tail light has been flickering for months and now is out. GMC will not fix because I am 4 months out of warranty. I only have 18,000 miles on my Yukon.

- Ormond Beach, FL, USA

Both brake lights failed within weeks of each other - around 60K miles. Faulty led circuit boards. Light assemblies are not repairable by dealership. New assembly over $500 each. GM takes no responsibility in resolving the issue. Unacceptable! no more gms for my family!.. and that includes Chevy.

- Clinton Township, MI, USA

I was driving down the road and someone clearly (due to the loud screeching of the tires) almost rear ended me. Thankfully they were able to stop just before hitting my vehicle. He caught me at a stop light and informed me that both of my brake lights were out unbeknownst to me. I have since taken the vehicle to the dealership, but there is an issue with the brake light system/parts for this vehicle. The brake light will work sporadically (without any knowledge of an issue). The manufacturer had to have known there was an issue with this part due to the owner's manual even stating "contact GMC dealership" without giving any troubleshooting advise on the light. The part is ~$650 to replace, both of my brake/tail lights have gone out within a 3 week period of each other and the dealership didn't seem surprised at all of this issue.

- North Richland Hills, TX, USA

The contact owns a 2015 GMC Yukon. The contact stated that the vent control function suddenly failed to work, which prevented the air conditioning and heat from working. The dealer (sunrise Buick GMC Chevrolet at collierville, 4605 S houston levee rd, collierville, tn 38017, (888) 484-2878) inspected the vehicle and stated that the condenser failed and the part was on a national backorder. The dealer stated that the condenser was engineered incorrectly and shook and rattled, which caused a crack that split the condenser. The contact stated that the manufacturer only provided a warranty extension from 36,000 to 60,000 miles, but had not issued a recall to provide a remedy. The contact corresponded with the manufacturer by email and phone and was informed that they would provide a follow-up response. The contact had been waiting for a response for months. The approximate failure mileage was 70,000.

- Olive Branch, MS, USA

Defective tail lights and headlights.

- El Paso, TX, USA

There seems to be a problem with the tail light assemblies on the Yukon product. The tail light will stop working and it will not give a warning that it has gone out. The assembly is $600 to replace and we have had to replace both. I am worried that they will fail again and I will be forced to replace them again. I have been watching other vehicles like mine and have noticed that other vehicles suffer the same problem. In small talk with the dealer, the service advisors acknowledged that it is a problem and even mentioned another model that had lights that were even more expensive.

- Brighton, CO, USA

Our 2015 Yukon XL denali has been in for repair service for 41 days since purchased new 3/23/15. The car has stalled while in motion with my wife and three daughters in the vehicle twice and been unresponsive to throttle input 3 additional times. The stall occurred once while turning left across traffic and another time while turning right and merging with traffic! the problem is intermittent and GMC has never been able to replicate it. They have given us the shoulder shrug, "I don't know what to tell you, we can't replicate it" line, so here are your keys. No warning indicators, no signs it may happen, and no way to pull up the issue with their diagnostics...huge safety concern and each time they have handed us the keys back after 7 days (their standard allotted time to have a loaner out) without any proactive escalation to find root cause or concern for my family's safety. The last time we took it in, they had it for 8 days and could not replicate the issue. We signed our service paperwork and I escalated to the service manager before leaving. After telling him we would be pursuing buyback, he miraculously had an idea it may be related to a wiring harness issue. This was based off his experience with a Sierra pickup (5.3L, not our 6.2L) that had similar behavior. We left the vehicle and, wouldn't you know it, they replaced a wire and "have reasonable confidence" it resolved the issue. Two weeks later, it's back in the shop for key fob not detected (after already driving). Truck is in gear and you cannot move...another huge safety concern. It's a dud. We have also had to have all 8 injectors replaced due to rough idling and the steering gear replaced from faulty manufacturing that creates a clicking while turning the wheel, the car is at the dealer and we will not be taking it back. We are going through the offical buy-back process with GMC.

- Woodstock, GA, USA

The contact owns a 2015 GMC Yukon. The contact stated that while reversing, the vehicle stalled without warning on two separate occasions. The vehicle was taken to the dealer for diagnostic testing on six separate occasions. The cause of the failure could not be determined. On another occasion, the contact was reversing and the vehicle stalled causing the contact to crash into a vehicle parked near the rear of the vehicle. The manufacturer was made aware of the failure. The failure mileage was 9,000. Updated 11/18/15 the consumer stated the vehicle also had numerous other electrical issues. Some of the issues caused the vehicle to shut down or reverse. Updated 1/12/2016 updated 01/29/16.

- Round Rock, TX, USA

My new, 2015 GMC denali is equipped with a backup camera and the quality is so poor at night, as to make it nearly more dangerous to use than to ignore it. I have had 3 prior GMC denali automobiles. The most recent was a 2011 which was traded in for this new one. The quality of the backup camera in the 2011 model was excellent. My wife and I immediately noted on the new car that the camera image was so blurry and poor resolution at night, we could not safely use the camera to back out of our gated driveway. In the daytime, the image is blurry as well, but usable. GMC has had the car twice for service and we have complained to GMC corporate and all we get is a statement that the "system is working normally" which is difficult to accept. The NHTSA's own statistics show that each year approx. 20 people die and 15,000 are injured due to backup incidents. Their guidelines state a camera needs to display (clearly I would assume) a 10 X 20 foot zone behind the vehicle. At night, you cannot see 20 feet clearly behind this vehicle, even in a well lighted street. I am convinced that this poor quality system is going to cause accidents if it has not done so already. GMC has an obligation to address what I believe is a sub-standard quality image. They cannot defend the fact that the image is much worse than older models of their vehicles. Fortunately, the new denali model does have a sensor system that provides a vibratory warning if you are about to contact an object, but obviously the driver needs to see clearly behind them, before they are about to strike an object in their path. I am hoping your Agency can contact GMC to help motivate them to address this issue and improve the safety of their vehicle(s) before the defect contributes to an unnecessary injury or death. In the meantime, we do not use the screen image at night. Thank you.

- Encino, CA, USA

The contact owns a 2015 GMC Yukon. While driving 35 mph, all the warning lights illuminated and the four wheel drive low independently activated. The vehicle was towed to a dealer. The technician diagnosed that the body control module needed to be repaired. The vehicle was repaired; however, the failure recurred. The vehicle was taken back to the dealer. The technician diagnosed that the body control module needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 5,000. The VIN was unavailable.

- Frankfurt, IL, USA

I have a brand new 2015 Yukon denali (short wheel base) with less than a thousand miles and a "service 4WD" message that has appeared twice rendering the car extremely unsafe and un-drivable for a long distance and having to have it towed to the dealer twice. A software update was done on the car the first time, only resolved the issue for a few weeks, the issue re-occurred after 3 weeks. When turning the vehicle on the dash gives the message "service 4WD". the car has a transmission button to change from 2wd, auto, 4 high and 4 low. I do not touch this button, I just leave the car in auto and drive. I do not tow anything, this is just a family car used for commuting. When the "service 4WD' message appears, the car is barely drivable. When it is put in reverse, the car just brakes after a few feet, as if the parking brake were on, but it obvious is not engaged. When turning left or right, the car brakes mid-turn and will only complete the turn if 3/4 to full accelerator is applied to continue through the turn. The car slightly bucks through the turn and the engine sounds different and has little power going around corners and going up hills. The car cannot safely be driven in a straight line faster than 40-50 mph. I telephoned onstar and diagnostics were run during both occurrences with the same error message from onstar diagnostics: "the braking system has an issue- transfer case module not working as expected". when will GM issue a recall on this safety issue, I do not feel safe letting my wife and child in the car if it brakes by itself, loses power and cannot complete turns. I purchased this car to have a safe/large vehicle for my family: Service 4WD appears on screen it renders the car un-drivable and the transmission button becomes inoperable and selecting other transmission modes becomes not possible.

- Cliffside Park, NJ, USA

I just completed a claim for my 2015 Yukon denali, NHTSA id #: 10643049 and read that almost the same exact issues are going on with the 2015 Chevy Tahoe models, see: NHTSA id number: 10638437, 10633519 and 10631583. When will GM see there is a pattern and issue a recall for this transmission issue? in all cases these render the calls un-drivable and having to have them towed.

- Cliffside Park, NJ, USA

Door latch in the locked position while door is open. Car computer thought the door was closed and door was open. Happened two times in one day. Very serious problem is driver is allowed to drive with children in the back seat with no warning that the door did not close.

- Argyle, TX, USA