GMC 1994 Sonoma Owner's Manual page 193

Towing From the Rear
NOTICE:
Do
not tow with sling-type equipment or rear bumper system
will be damaged.
Use wheel lift or car-carrier equipment.
Additional ramping may be required for car-carrier equipment.
Use safety chains and wheel straps.
If your vehicle has the four-wheel drive option, a dolly MUST
be used under the front wheels when towing from the rear.
Don't have your vehicle towed on the rear wheels, unless you have to. If the
vehicle must be towed on the rear wheels, don't go more than 35 mph (56
km/h) or farther than 50 miles (80 km) or your transmission will be
damaged. If these limits must be exceeded, then the rear drive wheels have
to be supported on a dolly.
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