Chevrolet 2010 Tahoe Owner's Manual page 187

Automatic Transfer Case
Use this dial to shift into and out of four-wheel drive.
The vehicle has Four-Wheel-Drive with StabiliTrak
information on StabiliTrak
page 5 6.
You can choose among three driving settings:
Indicator lights in the switch show you which setting you
are in. The indicator lights will come on briefly when you
turn on the ignition and the last chosen setting will stay
on. If the lights do not come on, you should take the
vehicle to your dealer for service. An indicator light will
flash while shifting. It will stay on when the shift is
completed. If for some reason the transfer case cannot
make a requested shift, it will return to the last chosen
setting.
The transfer case knob is
located to the left of the
instrument panel cluster.
® ®
, see StabiliTrak System on
2 (Two-Wheel Drive High): This setting is used for
driving in most street and highway situations. The front
axle is not engaged in two-wheel drive. This setting also
provides the best fuel economy.
AUTO (Automatic Four-Wheel Drive): This setting is
ideal for use when road surface traction conditions are
variable. When driving the vehicle in AUTO, the front
axle is engaged, but the vehicle's power is primarily
sent to the rear wheels. When the vehicle's software
determines a need for more traction, the system will
transfer more power to the front wheels. Driving in this
mode results in slightly lower fuel economy than
Two-Wheel Drive High.
4 (Four-Wheel Drive High): Use the four-wheel high
position when you need extra traction, such as on
®
. For
snowy or icy roads or in most off-road situations. This
setting also engages the front axle to help drive the
vehicle. This is the best setting to use when
plowing snow.
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