See also:

Engine Heater
The engine coolant heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below 0°F (−18°C). Vehicles with an engine coolant heater s ...

Infotainment System Menus
Tone Settings To access the tone settings, press the Home Page Tone button or the TONE button on the faceplate. Use the tone settings to adjust the following features: ○ Setting the tone &# ...

Engine Oil
For diesel engine vehicles, see “Engine Oil” in the Duramax Diesel Supplement. To ensure proper engine performance and long life, careful attention must be paid to engine oil. Following these si ...