See also:

Service Bulletins
Service Bulletins give additional technical service information needed to knowledgeably service General Motors cars and trucks. Each bulletin contains instructions to assist in the diagnosis ...

Reducing Speed While UsingCruise Control
Press in the set button at the end of the lever until you reach the desired speed, then release it. Each time you do this, you will go about 1 mph (1.6 km/h) slower. ...

RELEASE PARK BRAKE
This message is displayed if the electric parking brake is on while the vehicle is in motion. Release it before you attempt to drive. See Parking Brake for more information. ...