GMC SIERRA 1998 Manual page 263

5. Put the transfer case in NEUTRAL (N). See
"Four-wheel Drive" in the Index for the proper
procedure to select NEUTRAL (N).
6. When the vehicle is hooked up, release the
parking brake.
4. Put the transmission in NEUTRAL
(N).
5 . Put the transfer case in 2 High (2HI).
6. When the vehicle is hooked up, release the
parking brake.
Four- Wheel Drive-Vehicles (Electronic
Transfer Case)
Tow Limits
--
35 mph (55 krdh), 50 miles (80 krn/l1)
If your vehicle is four-wheel drive with an electronic
transfer case, use the following directions:
1. Engage the parking brake.
2. Turn the ignition key to OFF.
3. Clamp the steering wheel in a straight-ahead position
with a clamping device designed
for towing service.
(Do not use the vehicle's steering column lock for this.)
NOTICE:
If your vehicle is equipped with an electronic
transfer case and the tow limits must be
exceeded, a towing dolly must be used under the
rear wheels or vehicle/powertrain damage
will occur.
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