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 WarningSeat Belt Latch Stop Installation
Preliminary Procedure
Locate the hole in the seat belt webbing where the original seat belt
stop button was located.
If the original hole in the seat belt webbing is not visible, perform
the following:
If either the right or left stop button is missing use the opposing seat
...
Rear Side Door Wiring Harness Replacement
Preliminary Procedure
Remove the rear side door inner panel trim. Refer to Rear Side Door Trim
Replacement.
Rear Side Door Wiring Harness
Warning: Unless directed otherwise, the ignition and start switch must be
in the OFF or LOCK position, and all electrical
loads must be OFF befor ...
Tire Changing
Removing the Spare Tire and Tools
To access the spare tire and tools:
1. Retainer Nut.
2. Tool Bag Tether.
3. Tool Bag.
4. Spare Tire.
1. Open the trunk.
2. Lift the load floor.
3. Turn the retainer nut (1) counterclockwise to remove it.
Then remove the tool bag tether (2) from th ...