1998 GMC Sonoma Owner's Manual - Page 220

Towing Your Vehicle Try to have a GM dealer or a professional towing service tow your vehicle. See "Roadside Assistance" in the Index. If your vehicle has been changed since it was factory-new by adding things like fog lamps, aero skirting, orspecial tires and wheels, these instructions may not be correct. Before you do anything, turn on the hazard warning flashers. When you call, tell the towing service: 0 Whether your vehicle has rear-wheel drive or four-wheel drive. The make, model and year of your vehicle. Whether you can move the shift lever for the transmission and shift the transfer case, if you have one. If there was an accident, what was damaged. 0 0 0 When the towing servic,earrives, let the tow operator know that this manual contains these towing instructions. The operator may want to see them. To help avoid injury to or others: you 0 Never let passengers ride in avehicle that is being towed. 0 Never tow faster than safe or posted speeds. Never tow with damaged parts not fully secured. 0 Never get under your vehicle after it has been lifted by the tow truck. Always use separate safety chainson each side when towinga vehicle. 0 Never use J-hooks. Use T-hooks instead. 5-8