1993 GMC Safari Owner's Manual - Page 191

Hi// and Mountain Roads AM470001 Drivingonsteephillsormountains is differentfromdriving in flat or rolling terrain. If youdriveregularly in steepcountry,or if you'replanning to visit there,herearesometipsthatcanmakeyourtripssaferandmoreenjoyable. Keepyourvehicle in goodshape.Checkallfluidlevelsandalsothe brakes,tires,coolingsystemandtransmission.Thesepartscan hardonmountainroads. work Knowhow to godownhills.Themostimportant thing to knowisthis: Letyourengine do some of theslowing down.Don'tmakeyourbrakes do it all. Shifttoalowergearwhenyougodownasteeporlonghill. That way, youwill slowdown withoutexcessiveuse ofyour brakes. * If youdon't shift down,yourbrakes could get so hotthatthey wouldn't work well. You would then have poor braking or even none going down ahill. You couldcrash.Shiftdown to letyourengine assist your brakes 'on a steep downhill slope. L 4-35