Arming the System
To arm the system, press 
on the
RKE transmitter.
The alarm automatically arms after about 30 seconds. The security light, located on the instrument panel, flashes.
Press 
on the RKE transmitter to
open the trunk without setting off the
alarm. The system rearms when the
trunk is closed.
See also:
Automatic Transmission Fluid
How to Check Automatic Transmission Fluid
It is not necessary to check the transmission fluid level. A transmission fluid
leak is the only reason for fluid loss. If a leak occurs, take the vehicle ...
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 v ...
Engine Heater
The engine coolant heater, if available, can help in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up.
Plug in the coolant hea ...