Buick 2004 Park Avenue Owner's Manual page 156

Brake System Warning Light
Your vehicle's hydraulic brake system is divided into two
parts. If one part isn't working, the other part can still
work and stop you. For good braking, though, you need
both parts working well.
If the warning light comes on, there is a brake problem.
Have your brake system inspected right away.
When the ignition is on, the brake system warning light
will also come on when you set your parking brake.
The light will stay on if your parking brake doesn't release
fully. If you try to drive off with the parking brake set, a
chime will also come on until you release the parking
brake. If the light stays on after your parking brake is fully
released, it means you have a brake problem.
3-38
This light should come on
when you turn the key to
RUN. If it doesn't come on
then, have it fixed so it
will be ready to warn you if
there's a problem.
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 4-31.
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.