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Black plate (37,1)
Chevrolet Silverado Owner Manual - 2011
Driving and Operating 9-37
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 park 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 LED is lit.
.
Press and release the Cruise
Control Set switch. 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 shifter is
moved out of P (Park) or
N (Neutral).
.
Selecting the Cruise Control
On/Off button when it was
previously on.
.
Pressing the Cruise Control Set
switch a second time.
.
Pressing the accelerator greater
than a quarter of the down.
.
Turning the ignition switch to the
LOCK/OFF position.
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.