For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition
65 WarningStarter Replacement (LFX) Starting System Starter
Removal ProcedureTurn OFF the ignition.Disconnect the battery negative cable. Refer toBattery Negative Cable Disconnection and Connection.Remove the heat shield (2) from the starter.Disconnect the knock sensor connector.Disconnect and remove the bank 1 sensor 2 oxygen sensor after the left catalytic ...