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 WarningStabilizer Shaft Link Replacement
Preliminary Procedure
Raise and support the vehicle. Refer to Lifting and Jacking
the Vehicle.
Remove the front tire and wheel assemblies. Refer to Tire and Wheel
Removal and Installation.
Stabilizer Shaft Link Nut (Qty: 2)
Caution: Refer to Fastener Caution in the Pr ...
Map Data Updates
The map data in the vehicle is the most up-to-date information available when
the vehicle was produced. The map data is updated periodically, provided that the
map information has changed.
For questions about the operation of the navigation system or the update process,
contact the GM Nav Dis ...
Installation Procedure
Remove all mounds or loose pieces of urethane adhesive from the
pinch-weld area.
Inspect for any of the following problems in order to help prevent
future breakage of the window:
High weld
Solder spots
Hardened sealer
Any other obstruction or irregularity in the pinch-weld fla ...