Ken is facing a $13,000 repair bill on his 2007 Chevy 2500 diesel truck, because the full factory warranty the dealership assured him it had was voided by GM. The reason: GM says at some point in the past, someone put a chip in the truck that doesn’t match the info GM has, so they don’t have to service it. The problem for Ken is that the dealership didn’t check for this chip before it sold the truck to Ken, and Ken didn’t know about this loophole when he bought it. In fact, he says he bought it about a year and a half before GM implemented this rule. [More]