After traveling approximately 100 miles, we entered the tunnel from the yosemite national park entrance to the valley floor, the headlights failed to come on from the automatic setting even though the headlight icon illuminated on the dash board. After some confusion, the fog lights were turned on. The initial tunnel entrance from full daylight to darkness was problematic for ascertaining the sides of the roadway. High beams were not advisable due to the potential for blinding the oncoming traffic. The automatic systems are strongly safety oriented due to the driver dependence and confidence in the systems. The complete and random failure of the system and resultant failure of both headlights as opposed to a single failure expected of a manual system puts the driver and adjacent travelers in a dangerous and unexpected situation. A second failure was experienced about one week later on exiting from a well light parking area onto an urban roadway. Again the failure was not immediately perceived due to the illumination of the dashboard icon indicating that the lights were illuminated. The lights of the adjacent heavy traffic minimized the ability to perceive the lighting failure but clearly the adjacent drivers perception of the approaching car was affected. Once again, the remedial action was to illuminate the fog lights after cycling the manual control to no effect. The next morning, the system was performing normally. Random failures have a much stronger safety impact due to the unexpected nature of the failure. A trivial investigation on the internet revealed that this failure has been reported both to the NHTSA and the manufacturer, Chevrolet, to no effect. Failure has been attributed to a fuse block. The failure then appears to be a design flaw in the packaging of the fuse block.

- Seal Beach, CA, USA

At approximately 30mph the low beam headlights went out in auto mode. I immediately tried to go to manual mode but they were still out. I pulled over at an auto parts store, checked fuses (all fine) and finally had to resort to using fog lights. The next morning I took it to a repair shop, where they were found to be working fine. They found no issue. About a week later I was driving on the 405 freeway when they went out again. I again used the fog lights. I was parked for about 2 hours and when I got back in the car the low beams worked again. After about 20 minutes of driving, however, they went out again. After using the fogs to get home, the low beams have been working for the past couple of days but I'm sure it will keep happening.

- Beverly Hills, CA, USA

I was driving at night then all of a sudden my low beam headlights both shut off at the same time. My fog lights and high beams still worked. Gladly there was no one around, but this was extremely dangerous. I headed home immediately intermittently putting my high beams on. Someone is going to get injured in the future if this is not addressed by GM.

- Houston, TX, USA

When first starting the car the head light come on, after driving for about 20 min. And the engine gets hot the head lights go out and will not come back on. Dash board stes head lights suggested.

- Upper Marlboro, MD, USA

Low beam lights stop working while driving, leaving only the parking lights on unless you have the high beams on. Low beams will come back on briefly after turning the engine off & locking the car. Then pushing the unlock button on the fob will cause the low beams to work but only until the timer expires no matter if the switch is in auto or on position. This proves the bulbs are still functional & it has an electronic defect.

- Winnfield, LA, USA

Turn signal indicator began flashing rapidly to indicate the turn signal was not working properly. The front turn signal was not working. The turn signal bulb melted the internal socket so the internal harness system needs to be replaced. Chevrolet needs to issue a recall to change the specifications used for the turn signal light bulb so they do not melt and ruin the system.

- Sacramento, CA, USA

The contact owns a 2005 Chevrolet Corvette. The contact stated that the head lights and high beams failed, leaving only the fog lights in operation. The contact took the vehicle to the dealer where it was determined that the fuse box in the engine failed and once the engine became hot, the lights would fail. Once the engine cooled, the headlights would resume operation. The vehicle was not repaired. The VIN was not available. The failure and the current mileages were 65,000.

- Washington, DC, USA

I was driving my Corvette down I10 at night when my low-beams disengaged, placing me in the dark and almost caused a wreck. I drove rest of the way with my high-beams. The next day when I started it, the low-beams came on, but after about 5 minutes they both went off. The high-beams still worked. I went to a local Corvette-certified master mechanic who checked the bulbs, fuses, relays, and electrical. He said that it appeared to be an issue with the fuse block. He wanted a lot of money to replace it, so I held off to check it out some more. Every day, once my car became warm, either from running or from the Arizona sun, my low-beams would turn off. I went to the Corvette forum, the largest Corvette online community, and the members knew what was going on immediately. They told me it was my fuse block and that many C6 Corvettes had the same issue...as the engine compartment heated up, the running lights failed. They told me let my car run until the lights went out and then place a bag of ice on the fuse block. I did and within 10 minutes the lights came back on. The folks in the forum said that this was a well-known safety-defect in the Corvette world and that Chevy refused to acknowledge it. I went to the Chevy dealer and told one of the service managers. She disappeared for 10 minutes and when she came back told me that they had never heard of this issue. They ignored what I told them and said they would need half a day to explore the electrical system and that even then, they may not find the issue. The Corvette forum recommended that I report this as a safety issue. Here is just once of their links which reported the same problem. forums.corvetteforum.com/C6-tech-performance/3019489-hid-headlight-failure-as-car-warms-up.html.

- Scottsdale, AZ, USA

I was driving at night and the headlights turned off. After further incidents I discovered that the headlights work properly when the car is cold then after about 15 minutes the lo-beams go out. High beams and fog light function still works properly. The dash indicator on dash indicates lights are on even when they are not. It appears to be a thermal problem. You can drive a short distance and the headlights work properly. Park the car and drive it a short time later and the headlights don't work. I've discovered others on the internet have the same issue with the 2005 Corvette and they ended up having to replace the entire fuse box.

- Fort Worth, TX, USA

For no apparent reason, the front head lamps turned off at 10:45 pm. I was able to use the high beams, much to the dismay of oncoming cars, but no low beams. This scenario now repeats every time I drive the car at night. The low beam lights turn on normally, but turn off after about 30 minutes. I must then either use the daytime running lights or the high beams. Since they work normally when the car is cold, the issue seems to offer when ever the car achieves normal operating temperature. If I let it cool off, they work normally, ,,for about 30 minutes.

- Leesburg, FL, USA

Low beam headlights will go out after about 15 minutes of operation. Vehicle is not safe to operate when headlights are needed. Lights will not come back on. Night driving requires hi beam (not safe).

- Stone Mountain, GA, USA

Both low beam headlights went out at the same time driving home at night. Next day they were working fine when I started the car again. After driving about 15 minutes they both went out again.

- Owings Mills, MD, USA

My headlights stopped working. The light bulbs are fine and will work in the morning and it seems that it is a defect with the fuse box. In the morning when the fuse box is cold the lights will turn on. Afternoon and evening they fail due to temperature change. The fuse box needs to be replaced.

- Bethesda , MD, USA

Headlamps quit working while driving at night. Both headlamps did not turn on and I had to drive with the fog lights. I checked the relay and fuses which were all okay. This morning, they did work. I've researched other owner forums of which this incident has happened from a bad ground from an overheated fuse box in the engine compartment, with owners driving at night and driving lights going out inexplicably, which could lead to serious injury.

- Visalia, CA, USA

The low beam headlights go out after the engine compartment gets warm. Then when the engine compartment gets cool they will work again. From my research online and through the Chevrolet dealer it appears that the fuse box in the engine compartment alters the low beam signal circuit to the body control module when its temperature rises. This is obviously a design problem that has potentially tragic safety implications. The repair through the Chevrolet dealer was quoted to me as $1,200. The problem fuse box has no moving parts to wear out. There is nothing the car owner could have done to prevent this issue from occurring. It is sad owners have to pay to repair a part that shouldn't wear out because of a design flaw.

- Orange, CA, USA

Both headlight went out simultaneously and would not turn back on. It was not bulbs burning out since replacing them did not fix the problem. This was very dangerous since I was driving on the freeway at night at the time the lights went out.

- Blacksburg, VA, USA

Headlights randomly turning off once the fuse box in the engine bay is warm. When the car is cold the headlights work fine.

- Rocklin, CA, USA

My headlights spontaneously stopped working at night on my 2005 C6 Chevy Corvette.

- Houston, TX, USA

The contact owns a 2005 Chevrolet Corvette. The contact was driving approximately 60 mph and as he attempted to engage the left turn signal prior to changing lanes, the turn signal failed to operate. The vehicle was taken to an authorized dealer where they informed him that the turn signal bulb had overheated and caused the wiring harness to melt. The wiring harness, turn signal bulb and socket were replaced. The failure mileage was 19,617. Updated 03/24/11 updated 1/5/12

- Matthews, NC, USA

Headlight crazing diminishes light output

- Poinciana, FL, USA