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:

California Proposition 65 WarningCrankshaft Balancer Replacement
Special Tools
EN-470–B Angular Torque Wrench
EN-49979 Crankshaft Shock Mount Retainer
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove front wheelhouse liner exten ...
Fuel Tank Replacement
Removal Procedure
Disconnect the battery negative cable. Refer to Battery Negative Cable
Disconnection and Connection.
Relieve the fuel pressure. Refer to Fuel Pressure Relief.
Drain the fuel Tank. Refer to Fuel Tank Draining.
Lift and support the vehicle. Refer to Lifti ...
Secondary Air Injection System Description
The Secondary Air Injection System aids in the reduction of hydrocarbon exhaust
emissions during a cold start. This occurs when the start-up engine coolant temperature
(ECT) is between −10 to +56?C (14?33?F), the intake air temperature (IAT) is greater
than −10?C (14?F) and it has ...