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 WarningEnvironmental Fallout (Acid Rain)
Caution: Refer to Clearcoat/Ultraviolet Screeners Caution in the
Preface section.
Note: Always refer to the manufacturer's packaged instructions for
the detailed procedures of materials used for compounding and/or
polishing.
Since the severity of the condition varies from area to area, proper ...
Visual Aiming Preparation Procedure
Important: Some state and local laws specify requirements for
headlamp aim. Comply with all of these laws when performing any
headlamp aiming operations.
Headlamp aim should be checked:
When a new headlamp capsule is installed.
If service or repairs to the front end area have, or may have, ...
Ultrasonic Parking Assist
The Ultrasonic Rear Parking Assist (URPA) system assists the driver with parking
and avoiding objects while in R (Reverse). URPA operates at speeds less than 8 km/h
(5 mph). The sensors on the rear bumper detect objects up to 2.5m (8 ft) behind
the vehicle, and at least 20 cm (8 in) off the gr ...