GMC C-Series 2001 Owner's Manual page 58

Engine Alarm and Automatic
Shutdown (Option)
Your CHECK GAGES light will come on if the system
senses high engine temperature or low engine oil
pressure. If high engine temperature is detected, you
will also hear a tone alarm at two beats per second. The
alarm and the light will remain on until the condition is
fixed. If the engine temperature condition worsens, the
tone alarm will go to five beats per second. When a low
oil pressure condition is detected, the five beat per
second alarm will come on immediately.
If the system senses low engine coolant, the five beat
per second alarm and the LOW COOLANT warning
light will come on.
The five beats per second tone alarm means that your
engine will shut down in 25 seconds. Pull off the road
and shut off the engine. Don't start it until the reason for
the problem is known, and the problem is fixed. If the
engine shuts down when you are still in traffic, you can
restart the engine and get another 25 seconds of
operation. Do this only if you have to, since there is a
problem that can harm the engine if it isn't fixed. Engine
automatic shutdown, for gasoline engines, requires
activation by your dealer.
2-14
Fast Idle System (Electronically Controlled
R
Caterpillar Diesel and Gasoline Engines)
If your vehicle is equipped with an electronically
controlled diesel engine, it has both automatic and
manual fast idle capabilities.
Automatic Fast Idle System (Caterpillar
Engine Only)
The automatic fast idle feature will engage whenever
you start your vehicle and the engine is below the preset
operating temperature. This will help decrease engine
-
warm up time.
Idle speed will then return to normal under any of the
following conditions:
D
The engine reaches the preset operating temperature.
D
The brake pedal is pressed.
D
The trailer brake hand lever (if equipped) is applied.
D
The manual transmission clutch pedal is pressed or,
the automatic transmission (if equipped) is shifted
from NEUTRAL (N) or PARK (P).
D
The vehicle speed exceeds approximately
10 mph (16 km/h).
D
When the fast idle switch is pressed a second time.
R
Diesel