i work at a chevy dealer, about the only time you need to worrie about it is if its internal engine of transmission damage and bald tires that show abuse. and even then its a gray area because yeaterday i put a transmission in a 2006 colbalt ss because it was toast, it was done under warranty even though the rear tires were burnt off and the front tires were almost new. he rotated them before he brought it in. we knew he was racing it be we're not that big of dick to turn down work and say no to money. if they say shit to you bring it to me, we're in Pataskala.