2004 GMC ENVOY User Comment / Complaint

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.