Chevrolet avalanche 2002 用户手册

Press and release the 4HI or AUTO 4WD switch. 
This can be done at any speed (except when shifting
from 4LO), and the indicator light will flash while
shifting. It will remain illuminated when the shift 
is completed.

Press and release the 2HI switch. This can be done 
at any speed (except when shifting from 4LO).

To shift to 4LO, the ignition must be in RUN and the
vehicle must be stopped or moving less than 3 mph 
(4.8 km/h) with the transmission in NEUTRAL (N). 
The preferred method for shifting into 4LO is to have
your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). 
Press and release the 4LO switch. You must wait for 
the 4LO indicator light to stop flashing and remain
illuminated before shifting your transmission in gear.

If the 4LO switch is pressed when your vehicle is in
gear and/or moving, the 4LO indicator light will flash
for 30 seconds and not complete the shift unless your
vehicle is moving less than 3 mph (4.8 km/h) and the
transmission is in NEUTRAL (N). After 30 seconds 
the transfer case will return to the setting last chosen.

To shift from 4LO to 4HI, AUTO 4WD or 2HI your
vehicle must be stopped or moving less than 3 mph 
(4.8 km/h) with the transmission in NEUTRAL (N) and
the ignition in RUN. The preferred method for shifting
out of 4LO is to have your vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Press and release the 4HI, AUTO
4WD or 2HI switch. You must wait for the 4HI, AUTO
4WD or 2HI indicator light to stop flashing and remain
illuminated before shifting your transmission into gear.

If the 4HI, AUTO 4WD or 2HI switch is pressed when
your vehicle is in gear and/or moving, the 4HI, AUTO
4WD or 2HI indicator light will flash for 30 seconds but
will not complete the shift unless your vehicle is moving
less than 3 mph (4.8 km/h) and the transmission is 
in NEUTRAL (N).