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 WarningRemoval Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer to Bat ...
Accident With or Without Air Bag Deployment - Component Inspections
Warning: Proper operation of the Supplemental Inflatable Restraint
(SIR) sensing system requires that any repairs to the vehicle
structure return the vehicle structure to the original production configuration.
Not properly repairing the vehicle structure could cause
non-deployment of the air b ...
Recreational Vehicle Towing
Recreational vehicle towing refers to towing the vehicle behind another vehicle
– such as behind a motor home. The two most common types of recreational vehicle
towing are known as dinghy towing and dolly towing. Dinghy towing is towing the
vehicle with all four wheels on the ground. Dolly tow ...