Global Machinery Company Sierra 1999 - Manual (Page 100)

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Manual Transfer Case (If Equipped)
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.
The 4WD indicator will
light up when you shift into
four
- wheel drive and the
front axle engages.
Some delay between shifting and the indicator’s lighting
is normal.
An indicator on the bezel near the lever shows you the
transfer case settings:
2 - Wheel High (2H): This setting is used for driving in
most street and highway situations. Your front axle is
not engaged in two
- wheel drive. This setting also
provides the best fuel economy.
4 - Wheel High (4H): Use 4HI when you need extra
traction, such as on snowy or icy roads or in most
off
- road situations. This setting also engages your front
axle to help drive your vehicle. This is the best setting to
use when plowing snow.