GMC 2012 Canyon Owner's Manual page 193

Always be alert and pay attention to
your surroundings while driving.
If you become tired or sleepy, find a
safe place to park the vehicle
and rest.
Other driving tips include:
Keep the vehicle well ventilated.
Keep the interior
temperature cool.
Keep your eyes moving
the road ahead and to the sides.
Check the rearview mirror and
vehicle instruments often.
Driving on steep hills or through
mountains is different than driving
on flat or rolling terrain. Tips for
driving in these conditions include:
Keep the vehicle serviced and in
good shape.
Check all fluid levels and brakes,
tires, cooling system, and
transmission.
Shift to a lower gear when going
scan
down steep or long hills.
If you do not shift down, the
brakes could get so hot that they
would not work well. You would
then have poor braking or even
none going down a hill. You could
crash. Shift down to let the engine
assist the brakes on a steep
downhill slope.