GMC Sierra 3500HD 2001, Owner'S Manual, Page: 100 / 321

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Anti-Lock Brake System Warning Light
With the anti
-
lock brake
system, this light will come
on when you start your
engine and may stay on
for several seconds.
That’s normal.
If the light stays on, or comes on when you’re driving,
your vehicle needs service. If the regular brake system
warning light isn’t on, you still have brakes, but you
don’t have anti
-
lock brakes. If the regular brake system
warning light is also on, you don’t have anti
-
lock brakes
and there’s a problem with your regular brakes. See
“Brake System Warning Light” earlier in this section.
The anti
-
lock brake system warning light should come
on briefly when you turn the ignition key to RUN. If the
light doesn’t come on then, have it fixed so it will be
ready to warn you if there is a problem.
Engine Coolant Temperature Gage
This gage shows the engine
coolant temperature.
It also provides an indicator of how hard your vehicle is
working. During a majority of the operation, the gage
will read 210
_F (100_C) or less. If you are pulling a
load or going up hills, it is normal for the temperature to
fluctuate and approach the 260
_F (125_C) mark. If the
gage reaches the 260
_F (125_C) mark, it indicates that
the cooling system is working beyond its capacity.
See “Engine Overheating” in the Index.