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:
Guidelines
The RVC system has a guideline overlay that can help the driver align the vehicle
when backing into a parking spot.
To turn the guidelines on or off:
1. Shift into P (Park).
2. Press the CONFIG b ...
Resetting the Power Folding Mirrors
Reset the power folding mirrors if:
• The mirrors are accidentally obstructed while folding.
• They are accidentally manually folded/unfolded.
• The mirrors vibrate at normal driving speeds.
...
Fuel
Use of the recommended fuel is an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend the use of gasoline adv ...