1997 GMC Suburban Owner's Manual - Page 248

Towing Your Vehicle Try to have your GM dealer or a professional towing service tow your vehicle. See "Roadside Assistance" in the Index. They can provide the right equipment and know-how to tow it without damage. If your vehicle has been changed since it was factory-new, by adding such things as fog lamps, aero skirting, or special tires and wheels, these things could be damaged during towing. When the towing service arrives, let the tow operator know that this manual contains these towing instructions. The operator may want to see them. Before youdo anything, turn on the hazard warning flashers. When you call, tell the towing service: 0 That your vehicle has rear-wheel drive, or that it has the four-wheel-drive option. The make, model and year of your vehicle. 0 Whether you can move the shift lever for the transmission and transfer case, if you have one. To help avoid injury to or others: you Never let passengers ride in a vehicle that is being towed. Never tow faster than safe or posted speeds. Never tow with damaged parts not fully secured. Never get under your vehicle after it has been lifted by the tow truck. Always use separate safety chains on each side when towinga vehicle. If there was an accident, what was damaged. 5-8