GMC C series 2002 Owner's Manual page 58

Manual Fast Idle System (Caterpillar
Gasoline Engines)
This system can be used to increase your engine idle
speed whenever the following conditions are met:
D
The brake pedal is not pressed.
D
The trailer brake hand lever (if equipped) is
not applied.
D
The vehicle speed is below approximately 10 mph
(16 km/h) for vehicles with diesel engines. The
vehicle must not be moving and the accelerator must
not be pressed for vehicles with gasoline engines.
R
Diesel and
The manual fast idle switch
is located on the lower
portion of the instrument
panel to the left of the
steering wheel.
D
The manual transmission (if equipped) clutch
pedal is not pressed or, the automatic transmission
(if equipped) is in NEUTRAL (N).
The manual fast idle feature is activated by pressing the
switch on the instrument panel. When the switch is
pressed again, or any of the previous conditions are not
met, manual fast idle will be deactivated.
For vehicles with gasoline engines, the manual fast idle
has been preset at the factory. Your dealer may change
the setting to fit your needs.
For vehicles with diesel engines, manual fast idle can be
used to set any desired idle speed. To set a new
temporary engine idle speed:
1. Make sure all of the previously described conditions
are met.
2. Press the accelerator pedal to the desired
engine speed.
3. Momentarily press the manual FAST IDLE switch.
For vehicles with diesel engines, the temporary idle
speed will be set. This new rpm level will be
remembered by the system until either the ignition is
turned to LOCK or a new idle speed is set.
2-15