1993 GMC Jimmy Owner's Manual - Page 217

Hill and Mountain Roads - J AM470001 Drivingonsteephillsormountains is differentfromdrivinginflat or rolling terrain. If you drive regularly in steepcountry,or if you're planning to visit there,herearesometipsthatcanmakeyourtripssaferandmoreenjoyable. (See "Off-Road Driving" in the Index for information about driving off -road.) Keepyourvehicle in goodshape.Check allfluidlevelsand also the brakes,tires,coolingsystemandtransmission.Thesepartscanwork hard on mountainroads. Knowhow to godownhills.Themostimportantthing to know is this:let yourenginedosome of theslowingdown.Don'tmakeyourbrakes do it or longhill.That all.Shift to a lowergearwhenyougodownasteep way,youwillslowdownwithoutexcessiveuseofyourbrakes. I CAUTION shift If you don't A down, your brakes could get so hot that they wouldn't work well. You would then have poor braking or even none going down a hill. You could crash. Shift down to let your engine assist your brakes on a steep downhill slope. 445