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 tail lamp
pocket as noted from the original panel.
Note:
Clean and prepare the attaching surfaces for welding.
Position the tail lamp pocket on the vehicle.
Verify the fit of the tail lamp pocket.
Clamp ...
Replacing Airbag System Parts after a Crash
WARNING
A crash can damage the airbag systems in the vehicle.
A damaged airbag system may not work properly and may not protect you and your
passenger(s) in a crash, resulting in serious injury or even death. To help make
sure the airbag systems are working properly after a crash, have them in ...
Windshield Wiper/Washer
The windshield wiper/washer lever is on the right side of the steering column.
With the ignition in ACC/ ACCESSORY or ON/RUN, move the windshield wiper lever to
select the wiper speed.
HI: Use for fast wipes.
LO: Use for slow wipes.
INT: Move the lever up to INT for intermittent wipes, th ...