Anti-Lock Brake System Warning Light - GMC 2003 Savana 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 4-29 .
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CAUTION:
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.
3-30
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 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.
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.