Headlights were about as bright as a candle while using high beams changed the bulbs and used a head light restoration kit and within a week headlight lenses were hazed over again high beams are no brighter than low beams

- Randlett, UT, USA

The headlights are completely inadequate. If you are taking a turn at night, the lights continue to stay straight with the direction of the vehicle instead of following the vehicle so that you end up taking a turn blindly and cannot see the curb or edge of the road. It is a totally unsafe situation. We have found that you may have a bit more visibility if you run with the fog lights on, but very little improvement. Please find a solution, additional headlight, as this truck is very scary to drive at night.

- Hobe Sound, FL, USA

The projector headlights that are installed in this vehicle from the factory do not provide adequate visibility at night. I am unable to see more that 15 feet in front of this vehicle from a safety perspective. I have returned the vehicle to the dealer multiple times for repair. They changed the bulbs but stated they are working within design specifications and said that GM had used a new type of lighting system in 2015 but realized it is was not adequate and redesigned in later model year. If GM realizes they have a problem why will they not repair vehicles that they sold prior to realizing their mistake? in the rain at night there is virtually zero visibility. GM needs to fix this problem as it is a major safety issue.

- Saunderstown, RI, USA

Right rear turn signal bottom socket heats up and causes an open to the top turn signal socket so the top turn signal quits working and causes the system to hyper flash.and indicate inoperative right rear turn signal in message center. Only repair is to replace wiring harness and sockets. System works fine in cold temperatures as the socket does not heat up enough. Happens with vehicle stationary and in motion. Contacted GM about it and got nowhere.

- Copper City, MI, USA

The headlights are so dim the truck is dangerous to drive at night. I drove in a snow storm last night and I couldn't see ahead of me. I was driving on a highway at 45mph.

- West Gardiner, ME, USA

The headlights are to dim and unsafe on dark mountain roads since new.

- Vacaville, CA, USA

Head lights are so poor when driving in rural areas and poorly lit areas that the lateral lighting is so poor that you are left to guessing where and what you are turning into, extremely dangerous to all, dealer where purchased new stats there is no fix, accident waiting to happen.

- Campbellsport, WI, USA

The headlights are unbelievably inefficient. They light a narrow path about 30 yards in front of the truck. Driving at night is scary especially in the rain.

- Kent, OH, USA

Drove off the road because there was virtually no visibility in a dark subdivision. GMC initially denied there was a problem with the poor headlights --I stopped driving the vehicle at night since the $60,000 denali truck was unsafe to drive in the dark!!GMC eventually said they had a "bulletin" on the problem and they replaced the bulb and recalibrated the lights. About a 15-20% improvement--I still will not drive the truck at night as it is still unsafe.

- Gloucester, MA, USA

The contact owns a 2015 GMC Sierra 2500. The contact stated that the headlights were extremely dim and prevented the contact from viewing the road while driving at night. The contact was concerned that a crash could occur. The vehicle was taken to the dealer where it was serviced for a manufacturer update related to the headlights; however, the failure recurred. The manufacturer was notified of the failure. The failure mileage was unknown....updated 12/28/16 the consumer stated the lights are ok. However, they could be a lot brighter, because it is still hard to see at night. Updated 01/03/17.

- Windham, ME, USA

The low beam projector headlights are inadequate, especially in rural areas. There is a distinctive cutoff of light, call it a line when on low beam, and beyond that line their is no illumination whatsoever as you would be used to with other lighting designs. You can not see any signs, possible animals, or anything else as you are used to seeing in the light that typically extends beyond other low beam systems. I understand that GM has a tsb for the condition but it is not advertised and from what I can determine on the net does not work regardless and is only a band aid fix. These lights are a safety hazard. I believe this issue may have contributed to an accident I had...updated 01/04/17

- Dickerson Run, PA, USA

The headlights on the truck are a serious hazard. While driving at night you can only see about 20ft out in front of the vehicle. It's even worse when is raining.

- Moses Lake, WA, USA

The contact owns a 2015 GMC Sierra 2500. While driving at night, the headlights became very dim. The vehicle was taken to the dealer where it was diagnosed and repaired. The entire headlight assembly was replaced; however, the failure recurred. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was approximately 27,890.

- Williamsport, PA, USA

The headlights are not sufficent. Night driving is terrible, can not see road. I have spoken to GM several times. They came out with an up date, saying new bulbs and repower control module, but they are still horrible. GM had these lights for two years on the new body style for the Sierra line, and now have switched to led hid's. so the people who own 2014 and 2015 trucks are stuck.

- Bangor, ME, USA

The contact owns a 2015 GMC Sierra 2500. While driving various speeds, the projector headlights failed to adequately illuminate the road. The vehicle was taken to the dealer where the tcm and bulbs were changed per tsb number: Pit5374 (exterior lighting). The manufacturer was made aware of the failure. The failure mileage was unknown.

- North Canton, OH, USA

I live in the mountains of tehachapi, cannot see a thing when driving the mountain roads. Maybe 40-50 feet in front of the truck nothing to the side. Making a turn is like almost driving without lights.

- Tehachapi, CA, USA

The headlights offer very poor performance at night

- Newbury Park, CA, USA

Drivers side, in-mirror (with extendable, manual, trailer mirror) turn signal too bright or should be shielded from drivers eyes. Blindingly bright for making left-hand turns. Problem worsens as ambient light is reduced.

- Middleton, NH, USA

The headlights are not bright enough to light the roadway sufficiently at night while driving, especially on dark rural roads and during hazardous weather situations such as rain or fog. The dim light does not allow the driver to effectively see road hazards, pedestrians, bicyclists, animals or other obstacles that may appear and thus is a safety hazard.

- Atascadero, CA, USA

The headlights on the GMC 2500 hd are not bright enough. The lights are not able light roads without street lights, makes it very dangerous. Fuel filter has been replaced twice and my truck only has 12,000 miles on it. When I asked with the life of a fuel filter should be I was told by the GMC dealership at least 15,000 miles. It is possible there is a malfunction within the senor for the fuel filter.

- Parker, CO, USA