Chevrolet 2003 Avalanche Owner's Manual page 313

5. Release the parking brake only after the vehicle
6. When the vehicle is properly attached to the tow
being towed is firmly attached to the towing vehicle.
vehicle and is ready to be towed, turn the ignition
to LOCK.
Dolly Towing
m
Two-Wheel-Drive Vehicles
Two-wheel-drive vehicles should not be towed with the
rear wheels on the ground. Two-wheel-drive
transmission have no provisions for internal lubrication
while being towed. To properly tow these vehicles,
they should be placed on a platform trailer with all four
wheels off the ground.
Four-Wheel-Drive Vehicles
Use the following procedure to correctly tow you vehicle
on two wheels:
1. Firmly set the parking brake.
2. Shift the transmission to PARK (P).
3. Securely attach the vehicle being towed to the tow
vehicle.
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