Headlights are so dim because of the plastic cover that is made into the OEM headlight assembly. The plastic apparently had no UV protectant and the plastic has turned dingey yellow and clouded where it's affected the light output from the vehicle

- Palestine, TX, USA

Lights are too dim to drive at night. Bulbs have been replaced with 6 different styles but the lights are too dim. Bright lights shine too high to be useful. Spoke with numerous people who have had the same problem.

- Sultan , WA, USA

The stock headlights both low and high beams provide poor lighting at night. The headlights provide a poor beam pattern making it incredibly difficult to see more than 100 ft in front of you while driving down dark roads. And even more difficult in light storm conditions both rain and snow. The high beams aim too high when used and don't show enough of the road in front of you but rather the tops of tree's or other objects instead of the road. The low beams don't provide much light on the sides of the road as well and at times feel more like they're just fog lights with the amount of light that is put out. These incidents happen anywhere from low speeds up to highway speeds. I have noticed this issue since purchasing it used and have seen multiple similar complaints online.

- Raynham, MA, USA

This vehicle has poor headlight performance. I changed the bulbs to no avail. There is no way this 2015 GMC passes vehicle state inspections if they really look. There is very little power to the lights, even on the high-beams. After some quick research - GM has a service bulletin PIT5374 that addresses this very issue. But the dealerships are using this safety defect as a way to generate service volume. Requiring a $170 diagnosis to identify a problem they already know exists.

- San Antonio, TX, USA

The headlights are very poor. Can hardly see at night. They're no better when on high beams.

- San Leon, TX, USA

The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at various speeds, the transmission failed to operate as designed causing the vehicle to sputter and not properly accelerate. Also, the digital speedometer display would not display properly due to a faulty radio. Additionally, the driver-??s side headlight failed to properly illuminate due to moisture build-up inside the headlight assembly. The vehicle was taken to the local dealer who was unable to duplicate the failure. There was no service performed on the vehicle. The manufacturer was not notified of the failure. The approximate failure mileage was 1,000.

- Niles, OH, USA

The headlamps on my vehicle have been very poor, both in low and high beam positions ever since I purchased the vehicle. Thinking that their must be something wrong with the existing headlamps, I purchased the replacement bulbs and there were no improvements. When driving at night I have to stay on low beam with the fog lights on just to help to see. I can't use my high beams at all because the lighting is so poor. GMC is aware of their headlamp issues on the 2014 and 15 models but nothing is being done about it to my knowledge. Without spending $500-$1000 to change them over to led, is there anything that I can do to improve this situation?

- Moscow, IA, USA

The 3rd brake light allowed rain to enter the cab of truck.(gasket failed) headliner, carpet on floor, insulation all ruined. Diagnosed by a "water doctor" at the dealer where truck was purchased. The floor on the passenger front was soaked, headliner is stained. I removed all seats, carpet, insulation and the smell is still there. Called GMC to try to get assistance on repairs. Truck is out of factory warranty. GMC offered $585 leaving a balance of $1300 to be paid by me to replace the headliner. How is it that the 3rd brake light allows rain to enter the cab of the vehicle. Itemized estimate from dealer to replace and put truck back together is $4500-$5000. Money that I don't have. This is a poor design. Did not know/realize that a gasket would fail and allow water to leak inside. The truck is parked in our driveway or on the street. I do not have a garage. I started taking the seats and carpet out the last week of December 2020. Over the next few weeks insulation was removed. The moldy/musty smell remains. GMC was contacted approximately the last of January or the first week of February 2021. I am still in talks with them. Aaron, case manager at GMC with whom I have been dealing. He is trying to figure out someway to give me assistance in getting my truck back together. I don't know how long it has been leaking before I started smelling the musty odor.

- Hamilton,, OH, USA

While driving home the other night both headlights failed at the same time. Lost both high beam and low beam. Tried everything to get them on with no luck. Interment panel showed that they were still on. This was very scary and dangerous as I has traveling on a major highway. Luckily I had fog light to give me some light to GT off the highway safely.

- Fulton, NY, USA

While the head lights and fog lights are on, the right head and fog lights are dim but the left head and fog lights are bright. Also the right turn signal shows error message on the cluster that the bulb needs to be replaced and you can hear it blinking fast, but when I exit the vehicle to inspect the signal I notice that it is not blown and it works fine but I still get the error message and the fast blinking. Both stated problems occur while the vehicle is stationary and when the vehicle is in motion.

- Jackson, MS, USA

The contact owns a 2015 GMC Sierra. The contact stated that while driving at night or in inclement weather, the headlamps luminescence was not adequate for safe driving. The contact stated that the headlamps were extremely dim. The contact stated that he pulled off of the roadway several times due to the headlamp failure. The vehicle was taken to lone star Chevrolet (18900 northwest freeway, houston, tx 770650, and was diagnosed. The contact was informed that the vehicle operated as intended. The vehicle was not repaired. The manufacturer was notified of the failure. The contact was then informed that the vehicle was outside of the 36,000 mile warranty. The failure mileage was 106,000.

- Houston, TX, USA

When exiting from one highway to another in heavy traffic were breaking was required, my trucks power steering and power brakes had completely gone out. I was on a straight track for a highway patrol who was standing outside his vehicle along with another motorist. After fighting to steer the truck while trying to brake to avoid hitting other motorists I realized that the truck had also died. Shook up and scared I started the truck and began to drive away with the officer yelling what the hell are you doing. The truck has done this several times. Three of which almost resulted in an accident. It has been in the dealership were they told me it was a high resistance in the negative battery cable which was replaced and resulted in no change.

- Bakersfield, CA, USA

Very poor headlights. I just can't see. It is like a fog. Nlocked out side views. Dims are not good and brights don't even get flashed by oncoming vehicles. They shine in the trees. I took the vehicle in three times to a dealer of GMC's and they don't have a solution. They said they realize the problem but hands are tied because I think if they start to fix it a can of worms will be opened up and cost the company. How many complaints must you have?

- Pulaski, WI, USA

The contact owns a 2015 GMC Sierra 1500. While operating the vehicle at night, both the low beam and high beam headlights illuminated extremely low, which created a visibility hazard for the driver. Also, while driving in forward and reverse, the brake pedal became extremely hard to depress and the stopping distance was extended. The contact indicated that the failures were more present while driving at low speeds in reverse and after pressing the brake pedal multiple times. The cause of the failures was not determined. Charlie's Chevrolet (1412 us route 202, winthrop, me 04364) and the manufacturer were notified. The failure mileage was 14,000.

- Fayette, ME, USA

2015 GMC Sierra sle / 60K miles / projector headlights...numerous complaints from numerous others, I'm in the same boat. Illumination in general, driving in rural areas, driving in inclement weather, making turns (side streets), etc., is horrible, unsafe, nerve-racking and troublesome. Sure, the headlights look snazzy, but perform about as well as my lawn tractor's headlights. I see there's a tsb regarding the situation and, much to my dismay, I have to pay for said parts/labor to correct an obvious design flaw/snafu. Am I crazy for thinking this is unacceptable? even more shocking, it appears the BCM reprogramming (marginal results) and lamp replacement is problematic (increased voltage to a bulb/lamp shortens its life considerably). A vehicle that costs 30-40-50K should not have garbage technology. On the plus side, at 48 years young, my vision remains 20/20 and I do not require vision correction. The wife, my 2 kids (of driving age) and my neighbor concur - these headlights suck. I love everything else about the vehicle, but it looks like instead of spending $200 for the tsb, I'll try my luck with aftermarket replacements for $300. Via multiple online vehicle forums, most who've gone the route of tsb are marginally impressed and everyone electing to go with aftermarket is completely satisfied...that alone shines a spotlight on the lack of visibility both the NHTSA and GM are providing the consumer. Maybe instead of paying suits millions per year to produce subpar vehicles, GM should do the right thing and Focus on what matters most -- the paying customer. Yeah, we have a better shot with the NHTSA holding GM accountable and force them into a recall (correcting the problem properly, not a willy nilly reprogram and bulb replacement).

- Barrington, NH, USA

The bulbs in the tail lights corrode in place due to excess road grime (salt, sand, etc.) being splashed up on them. This causes them to burn out prematurely and removal is impossible due to the corrosion of the bulb into the socket. This results in having to replace the entire wiring harness. According to my local GMC dealership (West herr), this is a common problem that GM isn't covering. So, I had to pay for a new wiring harness out of pocket in order to replace one of the tail light bulbs.

- Lockport, NY, USA

Headlights are poor. Low and high beams do not illuminate the road effectively in rural areas

- Appleton, WI, USA

Projector style headlights that came factory are too dim making it very difficult to drive at night and unsafe. Lights are now powerful enough to light up the road.

- Oakley, CA, USA

The stock factory head lamps/bulbs are very dim and do not light up the side of the road or very far down the road and the lights have a very sharp cut off line.

- Plainville, CT, USA

The headlights on my 2015 GMC serria 1500 slt are unsafe. The headlights do not light to the sides adequitely and this is very apparent when making a turn at night. I have also read about this same headlight safety concern on several websites posted by other owners.

- Spring, TX, USA