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:
Under the Hood
The Yukon is available with either rear- or four-wheel drive. The Yukon
Denali can have an all-wheel-drive system that's distinct from the available
part-time four-wheel drive on the regular Yukon ...
Engine Cover
Engine Cover 3.0L V6
A. Oil Fill Cap
B. Engine Cover Bolt
C. Engine Cover
To remove:
1. Remove the oil fill cap (A).
2. Remove the engine cover bolt (B).
3. Raise the engine cover (C) to rele ...
Starting the Engine
Move the shift lever to P (Park) or N (Neutral). The engine will not start in
any other position. To restart the vehicle when it is already moving, use N (Neutral)
only.
Notice: Do not try to shi ...