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 WarningTire Sidewall Labeling
Useful information about a tire is molded into its sidewall. The examples show
a typical passenger vehicle tire and a compact spare tire sidewall.
Passenger (P-Metric) Tire Example
(1) Tire Size: The tire size is a combination of letters and numbers used to
define a particular tire's wid ...
Automatic Transmission Control Indicator Opening Cover Replacement
Automatic Transmission Control Indicator Opening Cover Replacement
Callout
Component Name
Preliminary Procedure
Remove the front floor console cover. Refer to
Front Floor Console Cover Replacement.
1
...
Front Wheel Drive Intermediate Shaft Replacement
Front Wheel Drive Intermediate Shaft Replacement
Callout
Component Name
Preliminary Procedure
Raise and support the vehicle. Refer to Lifting and Jacking the
Vehicle.
Remove the wheel drive shaft assembly from the vehicle ...