GMC 2007 Canyon - Manual (Page 186)

When the ignition is on, the brake system warning
light will also come on when you set your
parking brake. See Parking Brake on page 130 for
more information. The light will stay on if your
parking brake does not release fully. If it stays on
after your parking brake is fully released, it
means you have a brake 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 292.
{ 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.
Anti-Lock Brake System
Warning Light
With the Anti-Lock Brake
System (ABS), this light
will come on briefly when
you start your engine to
show it is working. Then
it will turn off. This is
normal.
If the light stays on, or comes on when you are
driving, your vehicle needs service. If the regular
brake system warning light is not on, you still
have brakes, but you do not have anti-lock brakes.
If the regular brake system warning light is also
on, you do not have anti-lock brakes and there is a
problem with your regular brakes. See Brake
System Warning Light on page 185.
The ABS warning light should come on briefly
when you turn the ignition key to ON. If the light
does not come on then, have it fixed so it will
be ready to warn you if there is a problem.
186