1999 GMC Jimmy Owner's Manual - Page 260

yellowblue When using wheel lift equipment to tow vehicles equipped with the electronic shift transfer case, a towing dolly must be placed under the rear wheels when towing from the front and under the front wheels when towing from the rear. When using wheel lift equipment to tow vehicles equipped with the active transfer case, the transfer case must be in NEUTRAL and the following tow limits must be used: NOTICE: If your vehicle is equipped with four-wheel drive and the towing limits must be exceeded, a towing dolly must be used under the front wheels or vehicle/powertrain damage will occur. Consult your dealer or a professional towing service if you need to have your vehicle towed. See "Roadside Assistance" in the Index. D Towing from the front -- 55 mph (88 km/h) or legal speed limit and distance is unlimited 50 miles (80 km) D Towing from the rear -- 35 mph (55 km/h), 5-8