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 WarningImmobilizer Light
The immobilizer light should come on briefly as the engine is started. If it
does not come on, have the vehicle serviced by your dealer. If the system is working
normally, the indicator light turns off.
If the light stays on and the engine does not start, there could be a problem
with the i ...
Front End Upper Tie Bar Replacement
Front End Upper Tie Bar Replacement
Callout
Component Name
Preliminary Procedures
Disable the SIR system. Refer to SIR Disabling and Enabling.
Remove the front fascia. Refer to Front Bumper Fascia Replacement.
Rem ...
Brake Rotor Assembled Lateral Runout Correction
Note:
Brake rotor thickness variation MUST be checked BEFORE checking for
assembled lateral runout (LRO). Thickness variation exceeding the maximum
acceptable level can cause brake pulsation. Refer to Brake Rotor Thickness
Variation Measurement.
Brake rotor assembled latera ...