See also:

Anti-theft Alarm System Messages
THEFT ATTEMPTED This message displays if the vehicle detects a tamper condition. ...

Potential Issues
Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five days, OnS ...

Before Driving Off-Road
○ Have all necessary maintenance and service work completed. ○ Fuel the vehicle, fill fluid levels, and check inflation pressure in all tires, including the spare, if equipped. ○ ...