2000 GMC Jimmy Owner's Manual - Page 239

Hill and Mountain Roads If you drive regularly in steep country, or if you're planning to visit there, here are some tips that can make your trips safer and more enjoyable. (See "Off-Road Driving" in the Index for information about driving off-road.) D Keep your vehicle in good shape. Check all fluid levels and also the brakes, tires, cooling system and transmission. These parts can work hard on mountain roads. thing to know is this: let your engine do some of the slowing down. Shift to a lower gear when you go down a steep or long hill. D Know how to go down hills. The most important CAUTION: Driving on steep hills or mountains is different from driving in flat or rolling terrain. If you don't shift 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. 4-38