The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below -18°C (0°F). Vehicles with an engine heater should be plugged in at least four hours before starting.

It is shipped from the factory with a tie holding it in place. Use care in removing the tie so that the cord is not damaged.
Check the heater cord for damage. If it is damaged, do not use it. See your dealer for a replacement. Inspect the cord for damage yearly.
Warning
Improper use of the heater cord or an extension cord can damage the cord and may result in overheating and fire.
Failure to use the recommended extension cord in good operating condition, or using a damaged heater or extension cord, could make it overheat and cause a fire, property damage, electric shock, and injury.
Keep the cord away from any moving parts.
If you do not it could be damaged.
The length of time the heater should remain plugged in depends on several factors. Ask a dealer in the area where you will be parking the vehicle for the best advice on this.
Starting the Engine
Retained Accessory Power (RAP)Front Fog Lamp Light
For vehicles with front fog lamps,
this light, in the display on the top of the center stack, comes on when the front
fog lamps are in use.
The light goes out when the front fog lamps are turned off. See Fog Lamps on
page 6-4.
Lamps On Reminder
This light comes on when the exterior
lamps ...
Connections
The required specific Onstar subscription plan includes the services that follow
to help customers stay connected.
For coverage maps, see www.onstar.com (U.S.) or www.onstar.ca (Canada).
WiFi Connectivity (If Equipped)
The vehicle has a WiFi hotspot that provides a high-speed, wireless Internet ...
Cruise Control Light
For vehicles with cruise control,
the cruise control light is white when the cruise control is on and ready, and turns
green when the cruise control is set and active.
The light turns off when the cruise control is turned off. See Cruise Control
on page 9-30.
Door Ajar Light
This light come ...