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 WarningEngine Coolant Temperature Warning Light
This light comes on briefly while starting the vehicle.
If it does not, have the vehicle serviced by the dealer. If the system is working
normally the indicator light goes off.
Caution
The engine coolant temperature warning light indicates that the vehicle has
overheated. Driving with this ...
Windshield Wiper Motor Replacement
Windshield Wiper Motor Replacement
Callout
Component Name
Preliminary Procedure
Remove the wiper system module. Refer to Windshield Wiper System Module
Replacement
1
Windshield Wiper Motor Brack ...
Transmission Fluid Cooler Flushing and Flow Test
GM studies indicate that plugged or restricted transmission oil coolers and pipes
cause insufficient transmission lubrication and elevated operating temperatures
which can lead to premature transmission failure. Many repeat repair cases could
have been prevented by following published procedur ...