My husband and I were driving on highway 1 just past montara beach. It was around 7:30 pm and already dark. We were going approximately 45 mph when all of a sudden, both headlights shut off on its own. We were approaching an extremely curvy stretch of road along ocean cliffs and there was nowhere to pull over. The symbol on the dash was lit up saying that our lights were on (even though they weren't). Thankfully there was a car in front of us and one behind us that gave us enough light and time to react which meant we didn't have to jam on our brakes and hope for the best. We tried the high beams which also did not work. After turning knobs and pressing buttons (while driving) to get some illumination, we finally were able to turn on the fog lights which was enough to get us somewhere safe. This is extremely dangerous and should never happen to anyone. Without the headlights from the car in front of us and behind us, this could have ended very badly, possibly even fatal. We were never able to get the headlights back on and plan on bringing the truck to a local GMC dealer tomorrow. Unfortunately, even if we get it fixed, we will be worried every time we drive it at night knowing that this could have ended so much worse. We haven't even put 1000 miles on it since we purchased it.

- Pacifica, CA, USA

During driving, the stability sensors would go off and show up stating stability turned off, or power steering turned off. The voltage on vehicle would suddenly drop from 15 to 9 and then back up. This will usually turn off the interior lights and electronics. I have discussed this with other 2014 Sierra and Silverado owners and they all advised this was occuring on their vehicles. There is a ground wire that was not properly installed under the dash which causes high resistance material to cause electrical issues. During one of my drives to work going 60 mph, the electrical components shut off and caused the engine to stop running. I was able to pull over while coasting on no power and restart the vehicle and it would continue to go. There have been times where the steering wheel would jerk while stationary as well. After many forum discussion this all related back to the ground wire not being properly installed by the manufacturer.

- Oklahoma City, OK, USA

Headlights not bright enough. Added auxiliary driving lights for safety at night.

- Bryan, TX, USA

The headlights on this pickup make driving at night in rural South Dakota almost impossible and even dangerous. I have owned this truck for only 2 weeks and found in order to drive at night I have to have the fog lights on to see, and even than it is not much better. The brights help none. Can't even tell when they are on vrs not. There has to be a fix or something that can be done to fix this. Driving at night is dangerous.

- Freeman, SD, USA

Headlights are not bright enough. Headlights are useless at night. Dealership changed bulbs and reprogrammed. Vehicle is still dangerous to drive at night. Vehicle has been this way since new.

- Memphis, MI, USA

The headlights on these trucks are horrible. Very unsafe to use.

- Gonzales, LA, USA

Poor illumination, after a few days the lights have been adjusted the light points very low that its almost imposible to see at night while driving at normal road conditions and with a good weather.

- Medford, NY, USA

Problem was present from the day I bought truck new. I live in a very rural area and the headlights are too dim to drive safely at night. Vehicle has been back to the dealer twice, once to replace bulbs and reprogram the BCM. Still not bright enough to feel safe driving at night. Second trip to the dealer they adjusted headlight up to high end of spec. Still not bright. I'm to the point of installing an after market hid kit.

- Salem Township, ME, USA

In the past 4 months, beginning at about 52K miles, I started receiving messages on my truck that said "stability control" was out and it locks the front left wheel, losing all steering, the radio and then the truck goes completely dead. The ac goes on/off and the headlights flicker. This is always at low speeds between 5-10 mph and most commonly when making a turn. I had the battery replaced at the dealership and now they're telling me I need a negative battery cable replacement?

- Plano, TX, USA

While driving lost all dash lights, , had to pull to side of road shut off engine then restart. Came back on.

- Yankton, SD, USA

The headlights are terrible in this truck. When we decided to purchase this truck it was very expensive but we thought we were making a good investment-wrong!!! what good is the truck if we get in accident because we can't see at night. GMC just tried to save money wherever they could-only the bare minimal-its all only about lining their pockets with the most cash that they can. We have talked to the dealer about this and they say they is nothing they can do. GMC replace the headlight starting in the 2016 but what about the 2014 & 2015 our life's don't matter?

- Waterford, PA, USA

Vehicle headlights fail to illuminate properly at night. Check with 2 different GMC dealers they say they are aware of the issue but no resolution is coming. Vehicle is not driveable at night on dark roads.

- Great Neck, NY, USA

The headlights on this truck are the worst performing lights I have ever used. They emit a very poor amount of light making it difficult to see at night and barely able to see at night if it is raining. I have almost been in several accidents at night because of the poor lighting. I have had the upgrade done by GM and that did not make these lights much better and definitely did not make it safer to drive at night. They need to replace the lights with the updated version they have installed in the 2016 models.

- Brunswick, OH, USA

The contact owns a 2014 GMC Sierra 1500. The contact stated that the headlights provided minimum visibility at night. The vehicle was taken to a dealer where a defect was not determined the vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 21,000. Updated 05/17/17 the consumer stated the headlights were very dim. Updated 10/11/2017

- Hubbardsville, NY, USA

The head lights are terrible. When driving in a area with street lighting they have very little affect.my 20 year old Mazda MPV has better lights

- Marysville, CA, USA

No accident... yet! but have had multiple near misses, and feel it's just a matter of time. The headlights on this vehicle are extremely inadequate even after having the recommended headlight upgrade service bulliten completed by my local dealer.

- Carthage, NY, USA

Extremely poor visibility with projection headlights, very little difference between hi & low beams. Dealer states they meet requirements.

- Solon, IA, USA

GMC Sierra MY2014 headlight don't illuminate properly down the road, the headlight don't give good advisably during dry, fog, or wet conditions. It is kind of sad spending over 45K on a vehicle that doesn't illuminate properly. I have own other GM vehicles have better illumination. There has to be a way to get a fix for this trucks

- Houston, TX, USA

Very poor performance from the headlights.

- Oliver Springs, TN, USA

My 2014 GMC Sierra has very dim head lights, very difficult to determine your own lane at times in the dark. Almost impossible to see when it's raining at night. Many times I've had to double check to make sure my headlights were on because there so dim it doesn't seem like there on at all. It makes for very nerve racking driving at night. Something needs to be done about these headlights, it's very dangerous for GMC drivers and other vehicles on the road.. test drive one in the rain at night out in the country.. not in town, with street lights!!!

- Clinton, WI, USA