Dave Gill Chevrolet - Service Center

I own a GMC Envoy. I have had a terrible sulfur/rotten egg smell coming from the exhaust, It is so bad that I can not have my windows down or fresh air coming through the vents. Dave Gill and GMC have b egg smell coming from the exhaust, It is so bad that I can not have my windows down or fresh air coming through the vents. Dave Gill and GMC have blamed it on the gas that I am using. They have gone so far as to say that I can only use Shell or Sunoco gasoline in the car. They have told me not to use BP,Speedway,Marathon,Wal Mart,Meijer, or any other gas station because they are considered to have bad gas. Joe the service manager even told me that GMC is going to be coming out with a list of preferred gas stations that owners of GMC vehicles should go to. The sad part of it all is that I am going to only Shell and I still have the smell and they refuse to do anything about it. I would stay away from any GM vehicle and I would not purchase any vehicle from Dave Gill, service IS NOT a priority to them. In my experience it seems once the sale is done, you are forgotten and nothing will be done to fix what any problems with the vehicle. I would not be writing this if I did not feel strongly that no one shopuld purchase anything from Dave Gill or any GM vehicles. Cars cost to much money to be stuck with a lemon that the dealer or the manufacturer will stand behind. More