Had a check engine light problem and starter noise. All were diagnosed and the starter was replaced but the missfire in #3 cylinder was not fixed as the tech needed to pull the engine apart and since I had a new engine put in 90000 km ago ( 3.5 years) it might not be covered under warranty so I said no. It only hampers the mileage at slow speeds so I did not want to pore any more money into an 03 Avalanche. Peter and the Tech were in contact with me during all phases of repair. Always great service and advice.