See also:

OnStar Personal Identification Number (PIN)
A PIN is needed to access some of the OnStar services, like Remote Door Unlock and Stolen Vehicle Assistance. You will be prompted to change the PIN the first time when speaking with an Advi ...

Starting the Vehicle with a Low Transmitter Battery
Replace the battery if the REPLACE BATTERY IN REMOTE KEY message displays in the DIC. See “Replace Battery In Remote Key” under Key and Lock Messages for additional information. If the trans ...

Engine Cooling System Messages
Notice: If you drive the vehicle while the engine is overheating, severe engine damage may occur. If an overheat warning appears on the instrument panel cluster and/or DIC, stop the vehicle as soo ...