Headlight Switch Problems of GMC Envoy

The daytime running lights (drl) and the low beam headlights do not light even when the dashboard light switch is placed in the �headlight� on position. Troubleshooting revealed that this failure was caused by the body control module (bcm) located beneath the rear seat. A digital logic signal from this module, based on sensor inputs from the ambient light sensor, parking brake and windshield wipers, is provided to the under-hood electronic relay that activates the headlights. There are three possible signal outputs from the bcm. . . A logic low (lights off), a logic high (low beams full on) or a pulse width modulated signal to create the dimmer drl low beam intensity. If the bcm fails, the low beam headlights will not turn on. There is no affirmative input to the electronic relay from the light switch, not routed through the bcm, to activate the low beam headlamps. This is a major safety issue. When the bcm fails at night, the driver has no low beam headlamps. The only lights available are the fog lamps or the high beam lamps, but only after setting the dashboard light switch to the headlamp position. Headlamps are a necessity, not a optional feature. Their operation should not rely on an electronic sub-system whose failure mode prevents the low beam headlights from working. This system was designed the �easy� way without regards to vehicle safety. . . Namely that when the dashboard light switch is in the on position, the headlights are enabled by a signal directly from that switch. Without an affirmative enabling signal from the manual dashboard light switch, the system and vehicle operator is at the mercy of the bcm, which could fail at night or on the weekend (when a repair shop is unavailable) rendering the vehicle dangerous or un-driveable.

See all problems of the 2007 GMC Envoy 🔎.

While driving at night both low beam headlights go out completely without warning. Vehicle traveling at highway speed and has happened while driving in city as well. Highbeam headlights work when switched on after low beam stop working. Cannot leagally drive with highbeams on always. My Envoy is in excellent condition and is dealer serviced even though it has high mileage. There was a recall for 2006 and up for this type issue, why was the 2004 model year not looked at? there are others that have had the same issue with lowbeam headlights. Fusebox underhood is labeled to confuse owner and relays not described well in owners manual. There is no relay listed for low beam headlights. Headlight driver module is a know failure component. Gm also changed onstar to digital system leaving gm cars like mine with analog onstar unservicable and requires expensive upgrade. Headlights going dark while driving at night is a danger and vehicle should be required to fall under recall for 2006 models as well. Slight accident, ran off road into ditch and caused light damage. Vehicle was able to be driven, but needed some repair.

See all problems of the 2004 GMC Envoy 🔎.

My dash panel gauges began failing one by one. My headlights will sometimes not come on after starting the car with the headlight switch on auto. A flick of the headlight switch in and off, does not make the headlights come on. Sometimes they come on after driving around, and then will go off without touching the switch. Now, my side brakelights will not operate correctly when the brake pedal is pressed. Only the third brake light illuminates.

About 4 years I noticed my low beam headlights sometimes would not work at night, forcing me to drive with my high beams on, blinding other motorists. This was reported to the dealer's service manager and he said it may cost $500 to determine the cause. I could not afford this expenditure. I try to avoid driving at night and only recently I had to drive at night and again my low beams would not work, forcing me to again drive with my high beams on. My fianc� did a google search and learned this is a common problem with this fuse/relay. We learned we could pull out the high beam fuse/relay which is identical to the low beam and switch them. Upon doing so, the low beams once again worked.

See all problems of the 2005 GMC Envoy 🔎.

I'm having a problem with my headlights going off while I'm driving down the road. It seems to happen while the lights are in automatic mode and when I try to switch them on manually after it happens it takes a few minutes for them to respond. This has happened on numerous occasions. And others that I know with the same model vehicles are having the same problem.

While driving at night on a city street the interior/dashboard lights, radio and headlights shut off. The car was able to drive off the main road and after turning the headlight switch to the left and right several times the lights came back on. The cause of the problem is unknown. After several weeks I have not seen the problem reoccur and have not been able to recreate it. Cause of the problem is unknown. I contacted the gm dealership and they said that nothing like this had been reported to them on other vehicles, and to bring the car in if the problem reoccurs. +.

I got in to my car the other night at around 7pm put it in drive and the headlights would come on so I tried the switch to turn them on manually and that didn't work, so I turn my car off and started it again and they still wouldn't work my hi-beams worked but my low beams and my daytime running lights don't work anymore. I have replace the bulbs and the relay switch and still nothing. So now I have to drive with my hi-beams on which is not good I got pulled over for driving with them on. I called the dealership where I purchased it and they said that my powertrain warranty doesn't cover for them to look at it & they want $75/hr just to look at it I can't afford that.

The contact owns a 2008 GMC Envoy. While driving at 20 mph, the headlights failed. The failure occurred on two occasions. The vehicle was taken to a dealer who replaced the relay switch. The manufacturer was not notified of the failure. The failure mileage was 98,000. The VIN was not provided.

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The contact owns a 2005 GMC Envoy. The contact stated that while driving at an unknown speed, the low beam headlights failed. The vehicle was taken to a private mechanic, who diagnosed that the relay switch for the low beam headlight assembly needed to be replaced. The vehicle was not included in NHTSA campaign id number: 07e014000 (exterior lighting). The manufacturer was notified of the failure. The approximate failure mileage was 103,750.

One evening while driving my vehicle on the highway, my headlights cut off. At first I didn't realize it until everything just appeared darker than usual. I had to switch to my high beams to finish the travel to my destination. This has happened continuously since then. Lights will come on at the start of the vehicle but shut down in no specific amount of time. I have taken it to three mechanics including a gm dealer and the vehicle lights stayed on during diagnosis. As of last night the lights did not come on at all. I will be returning to the dealership in the a. M in hopes that I may find a diagnosis and the solution. I can no longer drive my vehicle at night because I have already been pulled over by the police for this issue.

See all problems of the 2006 GMC Envoy 🔎.

The contact owns a 2006 GMC Envoy 360. The contact stated that there was an intermittent electrical short that was progressing and caused the headlights to flicker for the low beams, high beams, and the daytime running lamps. The vehicle was taken to a mechanic who replaced the dimmer switch, but the failure recurred. The vehicle was also included in NHTSA campaign number: 14v755000 (exterior lighting). The dealer was unable to determine when the part and the permanent remedy would become available. The vehicle was not repaired and the contact continued to experience the failure. The manufacturer was notified of the failure. The failure mileage was not available.

While driving on the expressway at about 11pm, going 70 miles per hour, my headlight just went out. I turned the control switch on and off to see if they would come back on but they didn't. I pulled onto the side of the road and check to see if my other lights were working (blinkers, flood lights, brights) and they were. My headlights however weren't. I tried turning the truck on and off to see if they would come back on but they didn't. After sitting there with the car off for about 10 minutes, I started it back up and they came on. I had to turn around and go back home in fear that I couldn't finish my trip because I didn't know if my lights would go out again. Since this first incident, my light go out on a daily basis and at random. They have gone out while my truck has been in park as well as while I've been driving. I have taken it into the shop and after them having my truck for 9 hours, they told me they worked the whole time while they had it (go figure). I took my truck back in this morning because it was happening again and I was able to show to them that my switch was registering my headlights as being on when they weren't. I have contacted GMC to file a complaint and was told at this time there wasn't much they can do and that I just need to get it repaired. Hard to do when no one will acknowledge the problem. I am beyond frustrated because I am limited when I can drive my vehicle due to this major issue that can happen at anytime without any warnings.

Safety issue: while driving home last night both low beam headlights went off. Pulled over and stopped the vehicle as it was dark. Turned head light switch on and off, but could not get lights to work. Bright lights worked and so did driving lights, therefore I drove on home. I checked the GMC web site and found no callbacks. However under problems with Envoy vehicles from general motors there are reports that this same electrical problem is being considered for a callback.

One evening I was driving on the main highway and my inside lights came on. I pulled to the side of the road to check the switch but it was on auto. I turned it off but the lights stayed on. They were still on when I got home and parked turned off the ignition the lights were still on. The next morning my car couldn't start because it had ran my battery down. Another incident was my headlights went off one night while I was drive on the highway. I am also having problems with my gas gauge. My gas light comes on like I am out of gas. The last time I fill my car up with gas it hesitated. It didn't want to start. The light stays on when my car is full of gas. I smell gas. I sat at the gas station for an our because my car didn't want to start. The sound of my radio goes in and out. My lights continue to go on and off when driving or when not driving. One morning I got up to go to work, went to start my car and the headlights were on but the switch was off. I couldn't get the lights to go off when I got to work. They stayed on at least for 4 hrs. Sometime the lights doesn't come on when I put them on. I really have some weird things go on with my vehicle. I did get the module changed and they did some re-wiring in the door. One year before the module, I got them to check my car for a short and I was told from them that my wires were over heated. I paid about $900 to fix it. I strongly think it is a detect some wheres or something that would cause my wires to over heat.