Buick RIVIERA 1993 Manual page 176

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.
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Keep your vehicle in good shape. Check all fluid
levels and also the brakes, tires, cooling system and
transaxle. These parts can work hard on mountain
roads.
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Know how to
go
down hills. The most important
thing to know is thisi let your engine do some of the
slowing down. Don't make your brakes do it all.
Shift to a lower gear when you go down a steep or
long hill. That way, you will slow down without
excessive use of your brakes.
If you don't shift down, your brakes could get
11 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
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CAUTION:
Coasting downhill in "N" (Neutral) 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
could crash. Always have your engine running
and your vehicle in gear -]en you go downhill.
Know how to go uphill. You may want to shift down
to a lower gear. The lower gears help cool your
engine and transaxle, and you can climb the hill
better.
Stay in your own lane when driving on two-lane
roads in hills or mountains. Don't swing wide or cut
across the center of the road. Drive at speeds that let
you stay in your own lane. That way, you won't be
surprised by a vehicle coming toward you in the
same lane.
It takes longer to pass another vehicle when you're
going uphill. You'll want to leave extra room to pass.
If a vehicle is passing you and doesn't have enough
room, slow down to make it easier for the other
vehicle to get by.