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 WarningCompass
The vehicle may have a compass display in the Driver Information Center (DIC).
The compass receives its heading and other information from the Global Positioning
System (GPS) antenna, StabiliTrak, and vehicle speed information.
Avoid covering the GPS antenna, located on the roof, for long perio ...
Windshield Wiper Arm Replacement
Windshield Wiper Arm Replacement
Callout
Component Name
Preliminary Procedure
Open and support the hood assembly.
1
Windshield Wiper Arm Nut Cap
Tip: Use a small flat-bladed tool in order to ...
Front Disc Brake Mounting and Hardware Inspection
Warning: Refer to Brake Dust Warning.
Inspect the fluid level in the brake master cylinder reservoir.
If the brake fluid level is midway between the maximum-full point and the
minimum allowable level then no brake fluid needs to be removed from the reservoir
before proceed ...