Chevrolet 2003 Tahoe Owner's Manual page 123

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.
When in 4L0, the vehicle stability is disabled. For more
information see Stabi/itrak@ System on
page
4-1 1.
Shifting Out of 4LO
To shift from 4LO to AWD 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 AWD switch. You must wait
for the AWD indicator light to stop flashing and
remain illuminated before shifting your transmission
into gear.
If the AWD switch is pressed when your vehicle is in
gear and/or moving, the AWD 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).
Shifting into NEUTRAL
To shift the transfer case to NEUTRAL do the following:
1. Make sure the vehicle is parked so that it will
not roll
2. Set the parking brake.
3. Start the vehicle or turn the ignition to RUN
4. Connect the vehicle to the towing vehicle.
5. Put the transmission in NEUTRAL (N).
6. Shift the transfer case to AWD.
7. Simultaneously press and hold the Stabilitrak@ and
4LO buttons for 10 seconds. The red NEUTRAL
light will come on when the transfer case shift
to NEUTRAL is complete.
8. Shift the transmission to REVERSE (R) for one
second, then shift the transmission to DRIVE (D)
for one second.
9. Turn the ignition to LOCK.
10. Place the transmission shift lever in PARK (P).
'
1. Release the parking brake prior to towing.
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