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 WarningRemoval Procedure
Turn the front wheels to the straight forward position and secure the
steering wheel from moving.
Remove the 2 lower steering intermediate shaft bolts (1).
Remove the steering intermediate shaft from the steering gear.
Raise and support the vehicle. Refer to Lifting and Jac ...
Prevailing Torque Fasteners
Prevailing torque fasteners create a thread interface between the fastener
and the fastener counterpart in order to prevent the fastener
from loosening.
All Metal Prevailing Torque Fasteners
These fasteners accomplish the thread interface by a designed distortion or
deformation in the fastene ...
Climate Controls
The heating, cooling, defrosting, and ventilation for the vehicle can be controlled
with these systems.
Vehicles without Air Conditioning
1. Temperature Control
2. Bi-level Air Mode
3. Floor Air Mode
4. Vent Air Mode
5. Fan Control
6. Driver and Passenger Heated Seats (If Equipped)
7. Re ...