Antilock Brake System (Abs) Warning Light; Trailer Antilock Brake System Warning Light - GMC 2010 T-Series Owner's Manual

Antilock Brake System (ABS)
Warning Light
If the light stays on, or comes on when you are driving,
your vehicle needs service. If the brake or low air
warning light is not on, you still have brakes, but you do
not have the antilock brake feature. If the brake and/or
low air warning light is on, you do not have antilock
brakes and there is a problem with your regular brakes.
See Brake System Warning Light on page 3 25 and
Antilock Brake System (ABS) on page 4 5 for more
information.
3-28
This light will come on
briefly when you start the
engine, then it will turn off.
This is normal.
Trailer Antilock Brake System
Warning Light
When this light comes on and stays on, it means there
is something wrong in the trailer Antilock Brake System
(ABS). Have the system repaired immediately.
If an ABS equipped trailer is not connected, this light is
not functional.
If your vehicle is
connected to a trailer with
antilock brakes, this light
should come on briefly, as
a check, when you turn
on the ignition.