We were driving at night and the head lights went out leaving us in the dark. We have checked the fuses but they are all fine. The fuel gauge does not come off of empty even though we fill it up.

- Paris , IL, USA

While I was driving on the ramp, my headlights started to flicker in and out. At one point the lights went completely out. After hitting a bump in the road the lights came back on. Went to the mechanic and they were not able to find anything wrong.

- Riverdale, MD, USA

On way driving down the road at 8:00 pm central time at night to mothers house at speed of 45 mph which is speed limit 55 mph. All of a sudden while driving, the headlights start flickering on and off. As I still driving, the headlights flickering on and off got worse and worse. I was immediately concern with the safety of myself and other drivers on the road that I had to stop at a store to check the lights. Lights and vehicle is intact and nothing seem to cause any obstruction for the lights to flicker on and off. I immediately came home which I was only 15 miles from the house.

- Vernon, AL, USA

Almost dusk, high beams were on. Thought I saw a flicker. Got behind another car and saw that it was my lights. Looked to my panel and my voltage was swinging between 9 volts up to 18-19 volts. Turned all power draw off except my low beams. Needle kept swinging and lights kept flashing. Was 6 miles from home. I made it. There was a discharge to my system instead of continueing to charge. Took to dealer. Nothing found. 11-6-2012 it happened again. Has happened inbetween also. Very intermittant. Had batttery & alternator checked at least 3 times. Always good. After incidents, works fine until next time. Never happened in summer. Always when cooler weather. Now that it is December, afraid to drive after dark. There must a bullentin or recall"?? too many complaints on this problem. Don't want to get rid of my car. Engine is good. Only 69,000 miles. Is dealer just acting dumb"

- Vale, NC, USA

Headlights began to dim, then brighten repeatedly, as to appear to be "flashing" other drivers. Shortly after, the oil pressure gauge malfunctioned. After the oil pressure gauge, a few days later the battery gauge malfunctioned. A few weeks later, the gas gauge stopped working right. Now, the engine continuously jerks, like it is missing due to lack of fuel. Contacted GMC on 11-09-2012. No solution.

- Eau Claire, WI, USA

The rear light, located at the top of the vehicle snapped off while traveling at a speed of 55 mph. Fortunately there was an accident as result, but very easily could have created one. Would like for GMC to cover the cost to repair.

- Battle Creek, MI, USA

The fuel gage stopped working and the low fuel light stays on. The check engine light keeps going on and off the port to check engine code does not work. The inside courtesy lights stopped working one back up light will not work the left brake light gets no power and won't work. Only 3 of the 5 speed settings on the fan work. GMC dealer says they can do nothing, and that they do not have other complaints on these problems. However I am able to find thousands of the same complaints online in various consumer sites. GMC won't even return my calls.

- Melba, ID, USA

Out of nowhere my front head lights went out. Its not the fuse or the bulbs, both front low lights went out. The high beams work. There is no power going to the lights and I have to buy a new switch. The gas gauge is broken. The ABS/brake light is on. I feel so stuck with this car!

- Fort Worth, TX, USA

Fuel gauge just stopped working. Is always on E. even when I fill it up.. gas light constantly on and dinging. I know this is a problem in Envoy and I feel GMC should be liable for correcting the problem. Mileage range is huge so it is hard to travel and know when to get gas. Especially on the interstate when gas stations are not always in range.

- Springfield, IL, USA

Speedometer jumps from 120 to wherever. Can never tell how fast or slow I'm going. Never displays correct speed. Oil pressure gage goes up and down. Also, headlights keep going out. Had to take to mechanic to redo wiring for both headlights.

- Iberia, MO, USA

Sporadic failure of speedometer - registers correctly one moment, or may read 30 mph or 0 mpg when keeping with the flow of traffic on the interstate. While this does not occur each trip, it does occur several times each week. Fuel gauge malfunction - reads one-half tank at 179 miles; 20 miles later reads one-quarter tank. Issues "fuel level low" warning after refueling and for next 3 to 4 times vehicle is started headlights dim briefly when accelerator is released. Frequent need to replace exterior lamps the problems first manifest in the need to repeatedly change brake and taillight bulbs, and the dimming of the headlights, which continues. Then, sporadically, the speedometer stopped functioning, or only registered a fraction of the speed the vehicle was traveling. After that, at start up, the "fuel level low" warning, which activates when the vehicle determines it has fuel to travel 40 additional miles, started to chime when there was more than one-half tank of fuel. The warning also now issues whenever the vehicle is refueled. The potential failure of the exterior lighting system presents a clear hazard to the occupants of the vehicle and others - the driver wouldn't be able to see where he is going, and other drivers wouldn't be able to see the vehicle heading toward them. The fuel system issues could lead to unexpectedly running out of fuel, creating the potential for a disabled vehicle or its driver being hit by another. In addition, depending on the cause of the malfunction, the vehicle could be susceptible to fire. Without a functioning speedometer, the driver can easily travel too fast for conditions, or endanger himself and others in a construction zone. Currently, until the sporadic problems become regular, the garage will not fix the vehicle.

- Wilmington, IL, USA

Out of nowhere my front head lights went out. Its not the fuse or the bulbs, both front low lights went out. The high beams work. There is no power going to the lights and I have to buy a new switch. I also had to replace the engine almost a year ago because the O rings went up. The gas gauge is broken and my passenger window will not go down. I feel so stuck with this car!

- Shady Side, MD, USA

Car switches into all 4W and higher by itself. I had been to a dealership 3 times in one year for which they were unable to find the problem. Now my warranty is up. After that I took it to a transmission shop where they supposedly fixed the problem for over 800.$ a week later it did it again. Now I have the 4WD disconnected for safety reasons. I would be driving on the freeway at 60-75 mph and if would switch and not come out no matter what I do. I have owned this vehicle for almost 5 years and it has done this the whole time. I am a single mom and I drive my 17 and 7 year old around in this car. Even with it disconnected it still tries to switch. There is no specific time, temperature, or other reason this happens. It has happened when I turn on the car and sometimes I can go a couple of weeks and other times it happens daily. I also have had my lights not go on for no reason and also the doors lock and can only be unlocked by using the key. And the hatchback will not open at all when this happens. Electrical?? help!!

- Tucson, AZ, USA

The contact owns a 2005 GMC Envoy. While driving at an unknown speed, the interior and exterior head lamps failed simultaneously without warning. As a consequence, visibility is significantly reduced, which increases the risk of a crash. The vehicle was taken to the dealer numerous times, but they cannot determine the cause of the failure. He is in the process of notifying the manufacturer. The failure mileage was 26,000 and current mileage was 46,000.

- Stanford, KY, USA

The contact owns a 2005 GMC Envoy. The contact stated that he was experiencing issues with the headlights. When his wife would drive the vehicle at 50 mph, the headlights would get dimmer and dimmer and then brighten again. On one occasion, the lights turned off completely and his wife had to drive home with the hazard lights flashing. The issue occurred intermittently. The contact took the vehicle to the dealer at least four times and they changed the switches and recalibrated the lights. The repairs caused other failures; therefore, they recalibrated to the original lights. The dealer stated that there was no remedy for the failure. The manufacturer stated that they would start a case for him and call him back. The current mileage was approximately 41,000 and failure mileage was approximately 23,000. Updated 11/14/08 the check engine light illuminated. The dealer replaced the O2 sensor. Updated 11/18/08.

- Stanley, NC, USA

I own a 2005 Envoy - 7 months after owning it - while driving in the dark all the sudden the headlights and dash/radio/mirror lights started flashing on and off. "like a cop car" to the point we pressed on star-afraid the car was going to stall on busy/dark freeway. When I called a dealer they said oh "that's normal" you had to much running and new cars can not handle "heater/radio etc. "its no big deal" > I called another dealer and they said no-this is a problem bring the car in. Ends up there was a bulletin for this and the chip had to be updated. Very wrong for the one dealer to say no big deal-when they know a update was out.

- Gilroy, CA, USA