Anti-Lock Brake System Warning Light - GMC C series 2002 Owner's Manual

Parking Brake Indicator Light
The light will stay on if your parking brake doesn't
release fully.
This light should also come on when you turn the
ignition key to START. If it doesn't come on then, have
it fixed so it will be ready to remind you if the parking
brake is applied or hasn't released fully.
2-68
Vehicles with hydraulic or
air brakes have a brake
indicator light. When the
ignition is on, this light will
come on when you set your
parking brake.

Anti-Lock Brake System Warning Light

If the light stays on, or comes on when you're driving,
your vehicle needs service. If the PRIMARY BRAKE
or LOW AIR warning light isn't on, you still have
brakes, but you don't have the anti
the PRIMARY BRAKE and/or LOW AIR warning light
-
is on, you don't have anti
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 ON. 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 it may stay
on for several seconds.
That's normal.
-
lock brake feature. If
lock brakes and there's a