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 WarningInstallation Procedure
Create 5 x 18 mm (4/16 x 11/16 in) slots for MIG-Brazing along the edges
of the front wheelhouse front panel as noted from the
original panel.
Create a 5 x 18 mm (4/16 x 11/16 in) slot for MIG-Brazing where front
wheelhouse front panel and front wheelhouse overlap.
C ...
Dual Stage Inflator Modules
Dual stage inflator modules contain a housing, inflatable air bag, two
initiating devices, canister of gas generating material and, in some
cases, stored compressed gas. The two initiators are part of the frontal
deployment loop. The function of the frontal deployment loops are
to supply curre ...
Windshield Wiper Arm Replacement
Windshield Washer Arm Finish Cap
Tip
Use a small flat-bladed tool to remove finish cap.
Special Tools
BO-6626 Wiper Arm Puller
For equivalent regional tools, refer to Special Tools.
Windshield Washer Arm Nut
Caution: Refer to Fastener Caution in the Preface section.
Procedure
...