GAS did extensive service on my Jeep in June and when it suddenly started vibrating it went back to GAS. Turns out, they had installed a defective fan assembly, which they quickly replaced at no charge, because of the nationwide warranty provided. I am now a committed customer, after just one, make it two, visits. We just moved here from Denver and was not really looking for a good garage, my daughter said go to Geiling, and glad we did.