1993 GMC Sonoma Owner's Manual - Page 223

Towing Your Vehicle Trytohavea GM dealer or aprofessionaltowingservicetowyourvehicle. Theycanprovidetherightequipment and knowhowtotow it without damage. If yourvehiclehas been changedsince it wasfactory-new,byaddingthings like foglamps,aeroskirting, or special tires and wheels,thesethings could bedamagedduringtowing. Before you do anything, turn onthehazardwarningflashers. Whenyoucall, tell the towingservice: or thatithasthefour-wheeldrive Thatyourvehiclehasrear-wheeldrive, option. Themake,model, and yearofyourvehicle. and shiftthe Whether you can movethe shift leverforthetransmission transfercase, if youhaveone. If therewas an accident,whatwasdamaged. I CAUTION To help avoid injuryto you or others: Neverletpassengersride Nevertowfasterthansafe in avehiclethat is beingtowed. or postedspeeds. it has been lifted bythetow Nevertowwithdamagedpartsnotfullysecured. Nevergetunderyourvehicleafter truck. Alwaysuseseparatesafetychainsoneachsidewhentowinga vehicle. use Never "J"T-hooks hooks. instead. Use I 5-7