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 WarningRoof
Specifications
Sunroof Schematics
Sunroof Component Views
Sunroof Frame
Sunroof Sunshade
Sunroof Window
Sunroof Window Seal
Sunroof Housing Rear Drain Hose
Sunroof Housing Drain Gutter
Sunroof Frame Bolts
Sunroof Window Guide
Sunroof Air Deflector Cover
Su ...
Transmission
Driver Shift Control (DSC) allows the automatic transmission to be shifted similar
to a manual transmission.
Electronic Range Select (ERS) allows for the selection of a range of gears.
Up-Shift Light
If the vehicle has a manual transmission, it will have an up-shift light that
indicates whe ...
Heated Oxygen and Oxygen Sensor Caution
Caution: Do not remove the pigtail from either the heated oxygen
sensor (HO2S) or the oxygen sensor (O2S). Removing the pigtail or the
connector will affect sensor operation.
Handle the oxygen sensor carefully. Do not drop the HO2S. Keep the in-line
electrical connector and the louvered end fr ...