1993 GMC Jimmy Owner's Manual - Page 249

a 9 KO721 8. Thenreplacethepressurecap.Besurethearrowsonthepressurecap lineuplikethis. Engine Fan Noise Thisvehiclehasaclutchedenginecoolingfan.Whentheclutchisengaged, thefanspinsfaster to providemoreair to cooltheengine. In mosteveryday drivingconditionstheclutch is notengaged.Thisimprovesfueleconomyand reducesfannoise.Underheavyvehicleloading,trailertowingandlorhigh outsidetemperatures,thefanspeedincreaseswhentheclutchengages. So youmayhearanincrease infannoise.Thisisnormalandshouldnotbe or makingextrashifts.Itismerelythe mistakenasthetransmissionslipping will slow downwhenadditional cooling system functioning properly. The fan cooling is notrequiredandtheclutchdisengages. Youmayalsohearthisfannoisewhenyoustarttheengine. asthefanclutchdisengages. It will goaway If a Tim Goes Flat It'sunusualforatireto"blowout"whileyou'redriving,especially if you maintainyourtiresproperly. If airgoesoutofatire,it'smuchmorelikely leak out slowly. But if youshouldeverhavea"blowout,"hereareafewtips aboutwhat to expect and what to do: If afronttirefails,the flat tire will createadragthatpullsthevehicletoward thatside.Takeyourfoot off the accelerator pedal and grip the steering wheel firmly.Steer to maintainlaneposition,thengentlybraketoastopwellout thetrafficlane. to of