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:
California Perchlorate Materials Requirements
Certain types of automotive applications, such as airbag initiators, seat belt
pretensioners, and lithium batteries contained in Remote Keyless Entry transmitters,
may contain perchlorate material ...
High-Beam On Light
The high&-beam on light comes on when the high-beam headlamps are in use.
See Headlamp High/Low-Beam Changer on page 6‑2 for more information. ...
Hill and Mountain Roads
Driving on steep hills or through mountains is different than driving on flat or rolling terrain. Tips for driving in these conditions include:
• Keep the vehicle serviced and in good shape.
• C ...