1993 GMC Safari Owner's Manual - Page 222

Problents on the Road - Engine Fan Noise Thisvehiclehasaclutchedenginecoolingfan.Whentheclutch is engaged, the fan spins faster to provide more air to cool the engine. In most every day drivingconditions,theclutch is notengaged.Thisimprovesfueleconomyand reducesfannoise.Underheavyvehicleloading,trailertowingand/orhigh So outsidetemperatures,thefanspeedincreaseswhentheclutchengages. youmayhearanincrease in fannoise.This is normalandshouldnot be It is merely the mistaken as the transmission slipping or making extra shifts. cooling system functioning properly. The fan will slow down when additional cooling is notrequiredandtheclutchdisengages. Youmayalsohearthis fannoisewhenyoustarttheengine. as the fan clutch disengages. It will go away If a Tim Goes Flat It's unusual for a tire to "blowout"whileyou'redriving,especially if you a tire, it's much more likely to maintain your tires properly. If airgoesoutof leakoutslowly.But if you should ever have a "blowout," here are a few tips about what to expect and what to do: If a front tire fails, the flat tire will createadragthatpullsthevehicletoward off the accelerator pedal and grip the steering wheel thatside.Takeyourfoot firmly.Steertomaintainlaneposition,thengentlybraketoastopwelloutof the traffic lane. A rearblowout,particularlyonacurve,actsmuchlikeaskid and may requirethesamecorrectionyou'duse in askid. In anyrearblowout,remove your foot from the accelerator pedal. Get the vehicle under control by steering the way you want the vehicle to go. It may be very bumpy and noisy,but you can still steer.Gentlybrake to astop,well off theroad if possible. If your tire goes flat, the next part shows how to use your jacking equipment to change a flat tire safely. 5-1 6