Engine Coolant Heater
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.
An internal thermostat in the plug-end of the cord may exist which will prevent engine coolant heater operation at temperatures above −18°C (0°F).
If the vehicle has a diesel engine, see the Duramax Diesel supplement for more information.
See also:
Exit Lighting
The interior lamps come on when the key is removed from the ignition.
They turn off automatically in 20 seconds. The lights do not come on if the dome override button is pressed in. ...
Receiving a Call
When an incoming call is received, the audio system mutes and a ring tone is heard in the vehicle.
• Press to answer the call.
• Press to ignore a call. ...
Safety Belt Extender
If the vehicle's safety belt will fasten around you, you should use it.
But if a safety belt is not long enough, your dealer will order you an extender. When you go in to order it, take the heaviest ...