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:
Driver Information Center (DIC)
The vehicle has a Driver Information Center (DIC).
The DIC displays information about this vehicle. It also displays warning messages if a system problem is detected.
All messages will appear in the ...
Heavy-DutyTrailer Wiring Harness Package
For vehicles equipped with heavy duty trailering, the harness connector is mounted in the bumper.
The seven-wire harness contains the following trailer circuits:
• Yellow: Left Stop/Turn Signal
...
Remote Vehicle Start
The vehicle may have this feature that allows you to start the engine from outside
the vehicle.
(Remote Vehicle Start): This button
will be on the RKE transmitter if the vehicle has remote start. ...