Brake System Warning; Light - GMC Express 2011 Owner's Manual

5-24 Instruments and Controls

Brake System Warning

Light

The vehicle brake system
consists of two hydraulic circuits.
If one circuit is not working, the
remaining circuit can still work to
stop the vehicle. For normal braking
performance, both circuits need to
be working.
If the warning light comes on, there
could be a brake problem. Have the
brake system inspected right away.
Metric
This light should come on briefly
when ignition key is turned to
ON/RUN. If it does not come on,
have it fixed so it will be ready to
warn if there is a problem.
When the ignition is on, the
brake system warning light also
comes on when the parking brake
is set. See Parking Brake on
page 9 34 for more information.
The light stays on if the parking
brake does not fully release. If it
stays on after the parking brake is
fully released, it means the vehicle
has a brake problem.
If the light comes on while driving,
pull off the road and stop carefully.
The pedal might be harder to push,
or the pedal might go closer to the
floor. It could take longer to stop.
If the light is still on, have the
vehicle towed for service. See
English
Towing the Vehicle on page 10 93.
The brake system might not be
working properly if the brake
system warning light is on.
Driving with the brake system
warning light on can lead to a
crash. If the light is still on after
the vehicle has been pulled off
the road and carefully stopped,
have the vehicle towed for
service.
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