Table of Contents
Advertisement
9-18
Driving and Operating
Notice: If you add electrical parts
or accessories, you could change
the way the engine operates. Any
resulting damage would not be
covered by the vehicle warranty.
See Add-On Electrical Equipment
on page 9 57.
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.
This system can be used to
increase engine idle speed
whenever the following conditions
are met:
The parking brake is set.
The brake pedal is not pressed.
The vehicle must not be moving
and the accelerator must not be
pressed.
To control the fast idle:
To enable the Fast Idle System,
press and release the cruise
control on/off button and ensure
that the switch indicator light
is lit.
Press and release the cruise
control SET-button. Engine
speed will be held at
approximately 1200 RPM.
When the fast idle is active the
Driver Information Center (DIC) will
display FAST IDLE ON.
One of the following actions will turn
off the fast idle:
Pressing the brake.
Selecting the cruise control
cancel button.
Releasing the parking brake.
The transmission shift lever is
moved out of P (Park) or
N (Neutral).
Selecting the cruise control on/
off button when it was
previously on.
I n f o r ma t i o n P r o v i d e d b y :
Pressing the cruise control
SET-button a second time.
Pressing the accelerator greater
than a quarter of the way down.
Turning the ignition switch to the
LOCK/OFF position.
Engine Heater
If the vehicle has a diesel engine,
see the Duramax diesel supplement
for more information.
The engine coolant 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 coolant 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).
Advertisement
Chapters
Table of Contents
