1997 Buick Riviera Owner's Manual - Page 187

If you drive regularlyin steep country, or if you're planning to visit there, here are some tips can make that your trips safer and more enjoyable. Keep your vehicle in good shape. Check all fluid levels and also the brakes, tires, cooling system parts can work hard on and transaxle. These mountain roads. 0 A CAUTION: Coasting downhill in NEUTRAL (N) or with the ignition off is dangerous.Your brakes will have to do all the work of slowing down. They could get so hot that they wouldn't work well. You would then have poor braking even none going down or a hill. You could crash.Always have your engine running and yourvehicle in gear when you go downhill. Know how to go down hills. The most important of thing to knowis this: let your engine do some the you slowing down. Shift to a lower gear when go down a steep or long hill. so If you don't shift down, your brakes could get hot that they wouldn't work well. You would then have poor brakingor even nonegoing down a hill. You could crash. Shift down to let your engine assist your brakes ona steep downhill slope. 4-24