Four-Wheel-Drive Light; Tow/Haul Mode Light - GMC 2012 Sierra Owner's Manual

If the regular brake system warning
light is not on, the vehicle still has
brakes, but not antilock brakes.
If the regular brake system warning
light is also on, the vehicle does not
have antilock brakes and there is a
problem with the regular brakes.
See
.
For vehicles with a Driver
Information Center (DIC), see
all brake related DIC messages.
If the vehicle is a hybrid, see the
hybrid supplement for more
information.

Four-Wheel-Drive Light

For vehicles equipped with the
four-wheel-drive light, it comes on
when a vehicle with a manual
for
transfer case is shifted into
four-wheel drive and the front axle
engages.
Some delay between the shifting
and the light coming on is normal.
See
for more information.
Instruments and Controls

Tow/Haul Mode Light

For vehicles with the Tow/Haul
Mode feature, this light comes on
when the Tow/Haul Mode has been
activated.
For more information, see
5-29
.