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 WarningInstallation Procedure
Drill 8 mm (5/16 in) for plug welding along the edges of the drivetrain
and front suspension frame front support as noted from the
original panel.
Clean and prepare the attaching surfaces for welding.
Position the drivetrain and front suspension frame front suppor ...
Rear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consists of the following components:
HVAC Control Module
HVAC Control Head
Rear Window Defogger Relay
Rear Defogger Grid
F28UA 40A Fuse
Rear Window Defogger Operation
The rear defog control system utilizes a sin ...
Instrument Panel Lower Trim Pad Cover Replacement
Preliminary Procedure
Remove the left outer trim cover. Refer to Instrument Panel Outer Trim Cover
Replacement - Left Side.
Instrument Panel Lower Trim Pad Cover Screw (Qty: 3)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2.5 N·m (23 lb in)
Instrument Panel ...