GMC 2012 Sierra Series Owner's Manual page 328

9-44 Driving and Operating
If the vehicle has StabiliTrak
shifting into Four-Wheel Drive Low
will turn Traction Control and
StabiliTrak off. See StabiliTrak
System on page 9 59.
Front Axle
The front axle engages and
disengages automatically when you
shift the transfer case. Some delay
for the axle to engage or disengage
is normal.
®
, Manual Transfer Case
®
The transfer case shift lever is on
the floor to the right of the driver.
Use this lever to shift into and out of
Four-Wheel Drive.
I n f o r ma t i o n P r o v i d e d b y :
A Four-Wheel Drive indicator light
comes on when you shift into
four-wheel drive and the front axle
engages. See Four-Wheel-Drive
Light on page 5 29.
Some delay between shifting and
when the indicator light comes on is
normal.