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:

California Proposition 65 WarningTurn and Lane-Change Signals
Move the lever all the way up or down to signal a turn.
An arrow on the instrument cluster will flash in the direction of the turn or
lane change.
Raise or lower the lever until the arrow starts to flash to signal a lane change.
Hold it there until the lane change is completed. If the lever ...
Steering Gear Replacement
Steering Gear Replacement
Callout
Component Name
Caution: With wheels of the vehicle facing straight ahead,
secure the steering wheel utilizing steering column anti-rotation pin,
steering column lock, or a strap to p ...
Tire Pressure Monitor Description and Operation
Tire Pressure Monitoring Block Diagram
...