GMC 2001 Yukon XL Owner's Manual page 152

Anti-Lock Brake System Warning Light
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
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don't have anti lock brakes. If the regular brake system
warning light is also on, you don't have anti
and there's a problem with your regular brakes. See
"Brake System Warning Light" earlier in this section.
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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.
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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.
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lock brakes
Engine Coolant Temperature Gage
United States
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 250 _ F (122 _ C) mark. If the
gage reaches the 260 _ F (125 _ C) mark, it indicates that
the cooling system is working beyond its capacity.
The "Problems on the Road," section of this manual shows
what to do. See "Engine Overheating" in the Index.
Canada