GMC 2002 Sierra - Manual (Page 280)

4-51
Dolly Towing (Two-Wheel Drive Vehicles)
Two - Wheel - Drive Vehicles
Two - wheel - drive vehicles, should not be towed
with the rear wheels on the ground. Two - wheel - drive
transmissions 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.
In rare cases when it’s unavoidable that a
two
- wheel - drive vehicle is to be towed with the rear
wheels on the ground, the propeller shaft to axle yoke
orientation should be marked and the propeller shaft
removed following the applicable service manual
removal/installation procedure.
Dust or dirt can enter the back of the transmission
through the opening created by removing the propeller
shaft if proper protection is not provided. Also, check
the transmission fluid level before driving the truck.
When the vehicle is properly attached to the tow vehicle
and is ready to be towed, turn the ignition to LOCK.
Clamp the steering wheel in a straight
- ahead position
with a clamping device designed for towing.
Four - Wheel - Drive Vehicles
Four - wheel - drive vehicles are not designed to be
dolly towed.
If you need to tow a four - wheel - drive vehicle see
“Dinghy Towing” earlier in this section.
NOTICE:
Dolly towing a four - wheel - drive vehicle will
damage drivetrain components. Don’t dolly tow
a four
- wheel - drive vehicle.