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:
Increasing Speed While Using Cruise Control
If the cruise control system is already activated:
• Press and hold the +RES button on the steering wheel until the desired speed is reached, then release it.
• To increase vehicle speed in smal ...
Using the “Store” Command
1. Press and hold for two seconds.
2. Say “Store.” 3. Say the phone number or group of numbers you want to store all at once with no pauses, then follow the directions given by the system to sav ...
Door Ajar Messages
DRIVER DOOR OPEN
This message displays and a chime may sound if the driver door is not fully closed and the vehicle is shifted out of P (Park). Stop and turn off the vehicle, check the door for obstr ...