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:
Power Seat Adjustment
To adjust a power seat, if equipped:
• Move the seat forward or rearward by sliding the control forward or rearward.
• If available, raise or lower the front or rear part of the seat cushion b ...
Fast Idle System
If the vehicle has this feature it is available only with cruise control.
The manual fast idle switch is operated using the cruise control buttons located on the left hand side of the steering wheel. ...
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload.
When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circui ...