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 WarningDoor Locks
WARNING
Unlocked doors can be dangerous.
• Passengers, especially children, can easily open the doors and fall out of
a moving vehicle. The chance of being thrown out of the vehicle in a crash is increased
if the doors are not locked. So, all passengers should wear safety belts properly
and ...
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 ...
Wheel Alignment - Steering Wheel Angle and/or Front Toe Adjustment
Ensure that the steering wheel is set in a straight ahead position.
Loosen the tie rod jam nut (1).
Adjust the toe to specification by turning the adjuster (2). Refer to
Wheel Alignment Specifications.
Caution: Refer to Fastener Caution in the Preface section.
Tighten the tie ro ...