Led brake light is faulty. Dealership wants over $800 for repair of single light. Seems to be a known problem for this make and model.

- Arlington, TN, USA

Driver side tail light and break light does not work intermittently. Under 32K miles. Dealer does not cover as there is no recall.

- Palmer, PA, USA

The vehicle has under 40,000 miles and the brake lights have failed. These are led type brake lights so they should last much longer. You can not replace the individual bulbs. You must replace the whole tail light assembly at the cost of $750 each. A warning on the dash never appeared to notify me that the brake light was not functioning.

- Pratt, KS, 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

Faulty brake lights. Goes out intermittently and then stops working altogether. Cannot be fixed or repaired whether it is one led light or many- the whole led display is faulty and stops working. Dealer was going to charge $750 to fix- for just 1 rear brake light. Not having fully functioning brake lights on a 3 year old car is unacceptable and should be under recall- it's a safety issue and obviously a faulty part when there are numerous complaints and blog posts about the same issue.

- Mission Viejo, CA, USA

Vehicle front headlight and taillight leds are out. Three out of the four lights have gone out in the last month.

- Atlanta, GA, 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

Driver side brake lights (entire light assembly) no longer work.

- Rowlett, TX, USA

The brake lights on my 2015 are defective. The driver side light went out about nine months ago and now the passenger side light is out. Our local dealership wants $800 apiece for these led lights that should last many, many years. A quick internet search reveals that 1) the problem is widespread and 2) GM won't acknowledge it. Working brake lights are a matter of safety, and the fact that GM produces these lights as cheaply as possible and then charges an arm and a leg after the parts fail early in their lifetime is suspect to say the least.

- Laguna Niguel, CA, USA

Wiring on the brake lights is faulty causing the light to work on and off. While driving you don't know if your brake lights are working because they come on and off at times

- Houston, TX, USA

2015 Yukon XL passenger side brake lights don't work

- Spotsylvania, VA, USA

The passenger side headlight assembly was working and now after having the truck since April the running light has gone out completely. It was already hard seeing the road ahead with the lights working because all of them are so dim but now it is even worse. The entire headlight has to be replaced because of moisture inside the so called sealed assembly. I took the truck to the dealership only to find out that it will cost me $1200 plus dollars for the light and labor this is really ridiculous. I have read on many different GMC forums that this is an all around state to state problem that I think GMC should address not only because of the cost but because of the safety issues that this poses. Please do something about this problem.

- Clarksdale, MS, USA

Water/condensation in headlamp, no indication of cracks, turn signal and portion of headlight is now malfunctioning. This is a constant problem.

- Jupiter, FL, USA

I have a 2015 GMC Yukon with condensation in the right and left front headlight assemblies. My turn indicator stopped working which usually indicates a burned out bulb. I did not notice the condensation and I took my Yukon to the dealership for what I thought was going to be a simple bulb replacement. The headlight assemblies are completely sealed which requires the replacement of the complete lamp assembly if a bulb filament burns out. The dealership pointed out the condensation and told me the bulb malfunction is likely caused by the condensation. Since my visit to the dealership yesterday, the turn indicator has worked intermittently. A call back to the dealership with the update and the response was that the condensation likely caused corrosion and still needed to be replaced. They advised me the other headlight and signal indicator were likely to malfunction as well. It is obviously an ongoing issue since GM issued a technical service bulletin around May 2014 and updated it in March 2016 to include 2016 and 2017 models. The condensation covers the entire lens. This is obviously an issue at night when using the headlights. The headlight assembly is non serviceable - entire headlight assembly must be replaced for non-working bulb at a huge cost $1200/side). Gms technical service bulletin notes that if certain conditions are noted (such as in my case), the replacement of the lamp assembly may not correct this condition.

- St. Petersburg, FL, USA

The contact owns a 2015 GMC Yukon. While driving various speeds, the brake lights failed to illuminate when the brake pedal was depressed. The dealer diagnosed that the tail assembly needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 35,510.

- Mont Vista, CO, USA

I would like to resort how hard it is to tell if these vehicles are turning or braking due to the "brake-light-turn-signal combination" where the brake light goes off when the turn signal is on.

- Overland Park, KS, USA

Transfer case engaged into 4WD while driving with touching any of the controls. Now it won't switch out. Service 4WD light appears.

- Broken Arrow, OK, USA