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 WarningPictures
Pictures can only be viewed using USB devices. If pictures are on an SD card,
transfer to a USB device or use a USB-SD adapter. File sizes above approximately
four mega pixels may not show. Only jpeg, bmp, gif, and png files are supported.
1. Press the Pictures screen button on the Home Page.
...
Tire Chains
WARNING
Do not use tire chains. There is not enough clearance. Tire chains used on
a vehicle without the proper amount of clearance can cause damage to the brakes,
suspension, or other vehicle parts. The area damaged by the tire chains could cause
loss of control and a crash. Use another type ...
Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or could
cause injury or death, you should immediately inform the National Highway Traffic
Safety Administration (NHTSA) in addition to notifying General Motors.
If NHTSA receives similar complaints, it may open an investig ...