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 WarningRemoval Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Disable the SIR System. Refer to SIR Disabling and Enabling.
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove all related panels and compo ...
Rear Compartment Lid Replacement
Preliminary Procedure
Remove the rear compartment lid inner panel trim. Refer to Rear Compartment
Lid Inner Panel Trim Replacement.
Rear Compartment Lid Hinge Bolt (Qty: 4)
Caution: Refer to Fastener Caution in the Preface section.
Tighten
9 N·m (80 lb ft)
Rear Compartment Lid
...
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 ...