1. I purchased a 2004 Envoy. The dealer I purchased it from had it under warranty. 2 weeks after I purchased, the interior lights were coming on and off, the automatic door locks started to lock by themselves simultaneously. Non stop. It scares my children, as well as I, because I don't know if it's going to spark a fire or what. Sometimes it does it more than others, for example, when it rains, but it only does it when I roll the driver's side window up. Even if its not down and I roll it up it does it. As well as if I hit a small pot hole and sometimes it just does it on its on. I've taken it to a GMC dealer 4 or more times and they can't find the problem any where. So, nothing has been done to fix this problem because no one can find a solution. I park my $18,000 vehicle next to the road in case it does spark a fire. Please inform me if anything is available or who I need to contact at GMC to find an answer.

- Campbellsville, KY, USA

I have been experiencing headlights, interior lights, lighting in the dash, and other lighting flicker while driving. It appears to be happening more and more. The lights become very dim and then get bright again in a matter of a few seconds. This is getting to be dangerous as people tend to pull over in front of me and sometimes traffic in going in the opposite direction coming towards me will pull of the road all thinking that I am flashing them either due to an emergency or just some wild driver behind the wheel. I had taken my vehicle to the dealer but he states he can not find anything wrong. Of course he also stated they took it for a ride but it does not happen for them. I guess not, it is hard to see lights flickering in the sunshine.

- Ramrod Key, FL, USA