1993 GMC Safari Owner's Manual - Page 209

Your hazardwarningflashersworknomatterwhatpositionyourkey andeven if thekeyisn'tin. To turn off theflashers, pull outonthecollar. is in, Whenthehazardwarningflashersareon,your turn signals won'twork. of theroad Other Warning Devices If youcarryreflectivetriangles,youcansetoneupattheside about 300 feet (100 m) behind yourvehicle. Jump Starting If yourbatteryhasrundown,youmaywant to useanothervehicleandsome jumpercables to start your vehicle. But please follow the steps below to do it safely. A Batteriescanhurtyou.Theycan bedangerousbecause: Theycontain acid thatcanburnyou. Theycontain gas thatcanexplodeorignite. Theycontainenough electricity to burnyou. If you don't followthesestepsexactly,some canhurtyou. or all of thesethings I NOTICE I gnoringthese steps could result in costlydamage to yourvehiclethat wouldn't be covered' by your warranty. Trying to start your vehicle by rushing or pulling it won'twork, and it could damage your vehicle. To Jump Start Your Vehicle 1. Checktheothervehicle.Itmusthavea12-voltbatterywithanegative groundsystem. i the othersystemisn't 12-volt systemwithanegativeground, ,chicles can be damaaed. both - 5-3