GMC 2006 Sierra - Manual (Page 133)

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.
A 4WD indicator light
comes on when you shift
into four-wheel drive and
the front axle engages. See
Four-Wheel-Drive Light on
page 3-50.
Some delay between shifting and when the indicator
light comes on is normal.
Recommended Transfer Case Settings
Driving Conditions
Transfer Case Settings
2H 4H 4L N
Normal YES
Severe YES
Extreme YES
Vehicle in Tow* YES
*See Recreational Vehicle Towing on page 4-62
or Towing Your Vehicle on page 4-62 for further
information.
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