Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Playing from a USB
A USB mass storage device or Microsoft Transfer Protocal (MTP) device can be
connected to the USB port.
The USB port is in the center console.
The USB icon displays when the USB device is connecte ...
Accepting or Declining a Call
When an incoming call is received, the infotainment system mutes and a ring tone
is heard in the vehicle.
Accepting a Call
Turn the MENU/SEL knob to “Answer” and press the MENU/SEL knob to acc ...
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
1.1. Start the engine.
1.2. Shift into a gear.
1.3. Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clea ...