Anti-Lock Brake System Warning Light - Hummer H2 2004 Owner's Manual

If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder to push. Or, the pedal may go closer to the
floor. It may take longer to stop. If the light is still on,
have the vehicle towed for service. See Towing
Your Vehicle on page 4-61.
CAUTION:
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Your brake system may not be working
properly if the brake system warning light is
on. Driving with the brake system warning light
on can lead to an accident. If the light is still
on after you have pulled off the road and
stopped carefully, have the vehicle towed
for service.
3-34
Anti-Lock Brake System
Warning Light
That's normal. If the light doesn't come on then,
have it fixed so it will be ready to warn you if there
is a problem.
If the light stays on, or comes on when you're driving,
your vehicle needs service. You will also hear a
chime sound when the light is on steady. 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. In addition to both lights, you will
also hear a chime sound on the first occurrence of
a problem and each time the vehicle is shut off and
then restarted. See Brake System Warning Light
on page 3-33.
With the anti-lock brake
system, this light will come
on when you start your
engine and may stay on for
several seconds.