Chevrolet 2010 Silverado Owner's Manual page 38

This light also comes on due to low brake fluid. See the
owner manual for more information.
United States
This light should come on briefly when the ignition key
is turned to ON/RUN. If it does not come on then, have
it fixed so it will be ready to warn if there is a problem.
4-6
Canada
If the light comes on while driving, pull off the road and
stop carefully. The pedal might be harder to push or can
go closer to the floor. It may take longer to stop. If the
light does not go out, have the vehicle towed for
service. See Towing Your Vehicle on page 5 2.
I n f o r ma t i o n P r o v i d e d b y :
WARNING:
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.