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 WarningSafety System Check
Now and then, check that the safety belt reminder light, safety belts, buckles,
latch plates, retractors, and anchorages are all working properly.
Look for any other loose or damaged safety belt system parts that might keep
a safety belt system from doing its job. See your dealer to have it rep ...
Dome Lamps
The dome lamp controls are in the headliner.
(Dome Lamp Override): Press
to turn the lamps off, even when a door is open.
(Door): Press to turn the
lamps on automatically when a door is opened.
(On): Press to turn on the
dome lamps. ...
Recreational Vehicle Towing
Recreational vehicle towing refers to towing the vehicle behind another vehicle
– such as behind a motor home. The two most common types of recreational vehicle
towing are known as dinghy towing and dolly towing. Dinghy towing is towing the
vehicle with all four wheels on the ground. Dolly tow ...