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 WarningWindshield Garnish Molding Replacement
Preliminary Procedure
Disable the SIR system. Refer to SIR Disabling and Enabling.
Windshield Garnish Molding Assembly
Procedure
Loosen tether clip and steel clips.
Disconnect electrical connector.
The tether clip at the upper portion of the garnish molding MUST be
repla ...
Information Displays
Driver Information Center (DIC)
The DIC displays information about your vehicle. It also displays warning messages
if a system problem is detected.
DIC Operation and Displays
The DIC has different displays which can be accessed by using the DIC buttons
on the turn signal lever.
The DIC displ ...
Rear Side Door Window Regulator Motor Replacement
Preliminary Procedure
Remove the rear side door window regulator. Refer to Rear Side Door Window
Regulator Replacement.
Rear Side Door Window Regulator Motor Screw (Qty: 3)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
9 N·m (80 lb in)
Rear Side Door Window R ...