Truck is in the shop now for the 4th time getting injectors replaced. I believe I have a lemon. I talked to GM cust. service and they said that they would notify their area rep. that I needed a buy back. The truck is less than a year old and has 37K on it. State law says that they have to refund full amount plus TTL. But they can deduct a reasonable amount for usage. How much is resonible? Any one else done this before? Has anyone gotten them to just replace the vehicle with a new one?