Bought a truck at L V C T I noticed that a check engine light was on after I paid cash for it. They gave me a loaner and changed the plugs etc. B T W The truck felt like it was running great. Then they realized one of the valves was not working exactly perfect. They gave it a complete valve job, without rushing through it. ( I was concerned because i knew that now they were probably loosing money on the sale. ) They let me use the loaner until we were 100 % confident that it was perfect. The truck runs like a brand new truck and it is 10 years old. Thanks Robert and Michelle. Alfred ( Buddy )