2015 GMC Sierra 1500 lights problems

Filed Aug 13, 2025 · Lights · PA

Headlights on this vehicle, since purchased, have not cast enough light in order to see in unlit backroads, or extrememly dim areas. I have to drive with my brights on constantly, in order to get enough light thrown onto the road, for the left and right sides, as well as the front. These were not working well since purchase. I took my child to a friends house in rural PA, and I literally could NOT SEE THE street signs, let alone far enough down the road. I nearly hit a stone wall.. My eyes keep asking to see more, but truck does not produce enough headlight. I even went to the eye doctor, after that situation, thinking it was my vision dimming, but was told I have 20/20. There needs to be a formal recall. I am not the only one complaining about these HORRIBLE projection headlights. To replace these headlights would cost over 1000K, out of pocket, which is not something I should have to fix. I am complaining now, because with the light getting darker earlier, am noticing how lousy driving at night really is.. and honestly, being BLINDED by oncoming LED's , without having proper headlights on my truck in order to see when blinded, really [XXX]. Please address these [XXX]. Make headlights great again! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 24, 2025 · Lights · WI

Lack of illumination of headlights straight ahead. No light shines to the sides of the vehicle making it difficult to see left or right when negotiating a turn at night. I have put new bulbs in both sides the best money can buy at CarQuest with no improvement. The headlight lenses are not dirty or fogged over. It appears to be a design problem, and I have seen other people with this model truck complain about the same thing on some blogs. I contacted GM directly looking for information I can get on a possible upgrade, and they have offered not solution. I have had this issue with this vehicle since buying it used 4.28.2018

Filed Oct 17, 2023 · Lights · TX

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

Filed Jun 3, 2023 · Lights · WA

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.

Filed Mar 22, 2023 · Lights · MA

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.

Filed Jan 30, 2023 · Lights · TX

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 $170.00 diagnosis to identify a problem they already know exists.

Filed Oct 21, 2021 · Lights · TX

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

Filed Jul 26, 2021 · Electrical, Lights · 1,000 miles · OH

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.

Filed May 12, 2021 · Lights · IA

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?

Filed Feb 26, 2021 · Lights · 35,000 miles · OH

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.