Chevrolet 2008 Colorado Owner's Manual page 112

Indicator lights in the buttons show you which setting you
are in. The indicator lights will come on briefly when you
turn on the ignition and one will stay on the selected
setting. If the lights do not come on, you should take your
vehicle in 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 does not shift, it will
return to the last chosen setting.
Shifting from Two-Wheel High to
Four-Wheel High
Press and release the Four-Wheel High button. This
can be done at any speed, and the front axle will lock
automatically.
Shifting from Four-Wheel High to
Two-Wheel High
Press and release the Two-Wheel High button. This can
be done at any speed, and the front axle will unlock
automatically.
It is normal to hear and feel your vehicle's transfer case
shift into Four-Wheel High. If you shift with the vehicle
stopped, the indicator light may still flash slowly. It may
be necessary to shift the transmission momentarily into
REVERSE (R) and DRIVE (D), for an automatic
transmission, or REVERSE (R) and FIRST (1) for a
manual transmission to have the light stop flashing.
2-30
Shifting from Two-Wheel High or
Four-Wheel High to Four-Wheel Low
To shift from Two-Wheel High or Four-Wheel High to
Four-Wheel Low, the vehicle must be stopped or moving
less than 3 mph (5 km/h) with the transmission in
NEUTRAL (N) for an automatic transmission or the clutch
pedal pressed for a manual transmission. The preferred
method for shifting into Four-Wheel Low is to have your
vehicle moving 1 to 2 mph (1.6 to 3.2 km/h).
Press and release the Four-Wheel Low button. You
must wait for the Four-Wheel Low indicator light to stop
flashing and stay on before shifting the transmission
into gear or releasing the clutch pedal.
If the Four-Wheel Low button is pressed when
your vehicle is in gear and/or moving faster than
3 mph (5 km/h), the four-wheel low indicator light will
flash for 30 seconds and not complete the shift.