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 WarningSteering Wheel Inflatable Restraint Module Replacement
Removal Procedure
Warning: When carrying a live inflator module, make sure the bag opening
is pointed away from you. This minimizes the chance of injury
in the case of an accidental deployment. Never carry the inflator module by the
wires. Never carry the inflator module by the connector on
t ...
Rear Side Door Wiring Harness Replacement
Preliminary Procedure
Remove the rear side door inner panel trim. Refer to Rear Side Door Trim
Replacement.
Rear Side Door Wiring Harness
Warning: Unless directed otherwise, the ignition and start switch must be
in the OFF or LOCK position, and all electrical
loads must be OFF befor ...
Transmission Messages
SERVICE TRANSMISSION
This message displays if there is a problem with the transmission. See your dealer.
TRANSMISSION HOT — IDLE ENGINE
This message displays and a chime sounds if the transmission fluid in the vehicle
gets hot. Driving with the transmission fluid temperature high can cause dama ...