Engine Coolant Temperature Gage; Low Coolant Warning Light - GMC 2003 GMT560 T-Series Owner's Manual

Engine Coolant Temperature Gage

United States
This gage shows the engine coolant temperature. If the
gage pointer moves into the red area, your engine
coolant might have overheated and your engine may be
too hot. You should pull off the road, stop your vehicle
and turn off the engine as soon as possible.
See Engine Overheating on page 5-18 . If you have a
®
Caterpillar diesel engine, also see your Caterpillar
Operation & Maintenance Manual.
3-30

Low Coolant Warning Light

The warning light should come on briefly, as a check,
when you turn on the ignition.
Canada
When it comes on, you will also hear a warning tone at
several beats per second for 10 seconds. See Engine
Coolant on page 5-16 and have your vehicle serviced as
soon as you can.
This light may also come on if your vehicle is equipped
with the automatic engine shutdown system and
engine shutdown has begun.
®
You have a low coolant
warning light. If this light
comes on, your system is
low on coolant and the
engine may overheat.