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 WarningInstrument Panel Fuse Block Access Hole Cover Replacement (Without AAL)
Instrument Panel Fuse Block Access Hole Cover Replacement
Callout
Component Name
1
Instrument Panel Fuse Block Access Hole Cover
Procedure
Grasp the lower edge of the fuse block cover and pull outward disengaging ...
Hydraulic Brake System Flushing
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components
Caution.
Inspect the brake fluid for the following conditions, indicating brake fluid
contamination:
Fluid separation, indicating 2 types of fl ...
Exhaust Rear Muffler Heat Shield Replacement
Exhaust Rear Muffler Heat Shield Replacement
Callout
Component Name
Preliminary Procedure
Disconnect the exhaust system hangers in the rear and allow the exhaust
system to rest on the rear axle.
1
...