Brake System Warning Light - GMC C-Series 2001 Owner's Manual

NOTICE:
If the check transmission warning light comes on
while you are driving, it is a warning that making
a transmission "range" change could leave you
stranded. The vehicle may not continue to move
if you change gears with the transmission shift
control. The transmission can't operate in all
gears because something is wrong. Leave the shift
control alone and drive directly to a GM dealer
for service. If you can't go in for service
immediately, have the vehicle towed.
Range Inhibited Warning Light (If Equipped)
The warning light should come on briefly, as a check,
when you turn on the ignition.
For detailed information on shift inhibit limitations, see
the Allison Automatic Transmission Operator's Manual
in your vehicle for further information.

Brake System Warning Light

Your vehicle has either hydraulic or air brakes. Each
system has different warning lights.
If your vehicle is equipped
with an automatic
transmission, this light
could turn on indicating that
transmission range shifts
may not occur.
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