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 WarningPark - Engine Running (Gen 2)
When the gear selector lever is in the Park (P) position, fluid is drawn into
the pump through the transmission fluid filter assembly. Line pressure is then directed
to the following valves:
Fluid Pressure Directed in Preparation for a Shift
Manual Valve
Mechanically controlled by ...
Intake Manifold Replacement (LDE)
Removal Procedure
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove the throttle body assembly. Refer to Throttle Body Assembly Replacement.
Disconnect wiring harness plug.
Disconnect the pipes from ...
Camshaft Actuator System Description
Camshaft Actuator System Overview
(1)
Camshaft Actuator Vane
(2)
Timing Chain Sprocket
(3)
Engine Oil Pressure-For retarding the camshaft
(4)
Camshaft
(5)
Input Signals from Engine Sen ...