1999 GMC Sierra 1500 Pickup Owner's Manual - Page 220

Your Driving and the Road Tips on Driving in Fog Ifyougetcaughtinfog,turnyourheadlightsonlowbeam,even in daytime. You'llsee-andbeseen-better.Useyourfog lights if yourvehiclehasthem. off the water droplets that Don'tuseyour high beams.Thelightwillbounce makeupfogandreflectbackatyou. Useyourdefogger. In high humidity,evena lightbuildup ofmoistureon the inside of theglasswillcutdownonyouralreadylimitedvisibility.Runyour windshield wiperandwasheroccasionally.Moisturecanbuilduponthe outsideglass,and whatseems to be fog mayactuallybemoistureonthe outside ofyourwindshield. Try tofindaplace to pullofftheroad. Of Treatdensefogasanemergency. courseyouwant to respectanother'sproperty,butyoumightneed to put somethingbetweenyouandmovingvehicles-space,trees,telephonepoles, a private driveway, anythingthatremovesyoufromothertraffic. If visibility is nearzeroandyoumuststopbutareunsurewhetheryouare awayfromtheroad,turnyourlightson,startyourhazardwarningflasher, andsoundyourhornatintervalsorwhenyouhearapproachingtraffic. Passothervehicles in fogonly if youcanseefarenoughaheadtopass safely.Eventhen,beprepared to delayyourpass if yoususpectthefogis worseupahead.Ifothervehiclestry to passyou,makeiteasyforthem. City Driving AM460003 Oneof the biggestproblemswithcitystreetsistheamount of trafficonthem. You'llwant to watchoutforwhattheotherdriversaredoing,andkeepclose track of traffic signals. 4-42