GMC Terrain 2025 - Hill and Mountain Roads

GMC Terrain/Terrain Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-18552429) - 2025
158 Driving and Operating
{ Warning
W
et brakes can cause crashes. They might
no
t work as well in aquick stop and could
cause pulling to one side. You could lose
control of the vehicle.
After driving through alarge puddle
of water or acar/vehicle wash, lightly
apply the brake pedal until the brakes
work normally.
Flowing or rushing water creates strong
forces. Driving through flowing water could
cause the vehicle to be carried away. If this
happens, you and other vehicle occupants
could drown. Do not ignore police warnings
and be very cautious about trying to drive
through flowing water.
Hydroplaning
Hydroplaning is dangerous. Water can build up
under the vehicle's tires so they actually ride
on the water. This can happen if the road is wet
enough and you are going fast enough. When
the vehicle is hydroplaning, it has little or no
contact with the road.
There is no hard and fast rule about
hy
droplaning. The best advice is to slow down
when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet weather
driving tips include:
•
Allow extra following distance.
•
Pass with caution.
•
Keep windshield wiping equipment in
good shape.
•
Keep the windshield washer fluid
reservoir filled.
•
Have good tires with proper tread depth.
See Tires 3249.
•
Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or through mountains is
different than driving on flat or rolling terrain.
Tips include:
•
Keep the vehicle serviced and in
good shape.
•
Check all fluid levels, brakes, tires, cooling
system, and transmission.
•
Sh
ift to alower gear when going down
steep or long hills.
{ Warning
U
sing the brakes to slow the vehicle
on
along downhill slope can cause
brake overheating, can reduce brake
performance, and could result in aloss
of braking. Shift the transmission to a lower
gear to let the engine assist the brakes on
asteep downhill slope.
{ Warning
C
oasting downhill in N(Neutral) or with
th
e ignition off is dangerous. This can
cause overheating of the brakes and loss
of steering assist. Always have the engine
running and the vehicle in gear.
•
D
r
ive at speeds that keep the vehicle in its
own lane. Do not swing wide or cross the
center line.
•
Be alert on top of hills; something could be
in your lane (e.g., stalled car, crash).