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 WarningRear Compartment Lid Emblem/Nameplate Replacement (Bowtie)
Rear Compartment Lid Emblem Assembly
Caution: Refer to Exterior Trim Emblem Removal Caution in the
Preface section.
Procedure
The part and surface should be 21°C (70°F) prior to installation. The
vehicle should remain 21°C (70°F) for
one hour after assembly to allow adhesive to deve ...
Daytime Running Lamps (DRL)
Daytime Running Lamps can make it easier for others to see the front of your
vehicle during the day. Fully functional daytime running lamps are required on all
vehicles first sold in Canada.
A light sensor on top of the instrument panel makes the DRL work, so be sure
it is not covered.
The D ...
Instrument Panel Outer Air Outlet Duct Replacement
Preliminary Procedure
Remove instrument panel assembly. Refer to Instrument Panel Assembly
Replacement.
Instrument Panel Outer Air Outlet Duct Screw (Qty: 7)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2.5 N·m (22 lb in)
Instrument Panel Outer Air Outlet Duct
Floo ...