1993 GMC Suburban Owner's Manual - Page 224
1993 GMC Suburban Manual
Page 224 highlights
AN480044 Runyourengineonlyaslongasyoumust.Thissavesfuel.Whenyourun theengine,make it goalittlefasterthanjustidle.Thatis,pushthe acceleratorslightly.Thisuseslessfuelfortheheatthatyougetand it keeps the battery charged. You will need.a well-charged battery to restart the vehicle,andpossiblyforsignalinglateronwithyourheadlights.Lettheheater runforawhile.Then,shuttheengine off andclosethewindowalmost all the waytopreservetheheat.Starttheengineagainandrepeatthis only' when youfeelreallyuncomfortablefromthecold.Butdoit as littleaspossible. you can.Tohelpkeepwarm,youcangetout Preservethefuelaslongas of the vehicle and do some fairly vigorous exercises every half hour or so untilhelpcomes. If You're Stuck in Deep Snow This manual explains how to get the vehicle out damagingit.See"RockingYourVehicle"intheIndex. of- deep snow without