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:
Using the USB Port
For vehicles with a USB port, the connector is located in the instrument panel storage area.
See Instrument Panel Storage on page 4‑1 for more information.
Radios with a USB port can control a ...
Vehicle Security
This vehicle has theft-deterrent features; however, they do not make it impossible to steal. ...
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The cord is secured to the Engine Compartment Fuse Block with a clip. Carefully remove the wire tie which bundles the electric ...