My car broke down and was told i needed a wiring harness. Part was discontinued and could not get. It burnt out my Engine control module and cost me $800.00 My car broke down again, they told me a solenoid went bad and leaked oil on the wire that they missed the first time. They refunded me the part but still cost me $500.00. My car broke down again and refused to repair it because they could not get the wiring harness, The service manager said my guys do not work for free and take my car somewhere else".. I did and they said I did not need a wiring harness and that a thermostat leaked anti freeze and the wires. it damaged my coil pack and my new engine control module. This cost me $1000. Customer service at GM said they will do nothing for the gross incompetence of the dealer User's recommendation: Do not by a GM car.