Recreational Vehicle Towing; Two-Wheel Drive Vehicles - GMC 1999 Suburban Owner's Manual

Recreational Vehicle Towing

There may be times when you want to tow your vehicle
behind another vehicle for use at your destination. Be
sure to use the proper towing equipment designed for
recreational vehicle towing. Follow the instructions for
the towing equipment.
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Two-Wheel Drive Vehicles

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Two wheel drive vehicles, should not be towed with all
four wheels on the ground. Two
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. Towing with all four wheels on
the ground should be avoided.
In rare cases when it's unavoidable that a two
drive vehicle is to be towed with all four 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 vehicle.
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