GMC Yukon 2025 - Page 187

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-17942154) - 2025
186 Driving and Operating
Before driving on ahill, assess the steepness,
t
r
action, and obstructions. If the terrain ahead
cannot be seen, get out of the vehicle and walk
the hill before driving further.
When driving on hills:
•
Use alow gear and keep afirm grip on the
steering wheel.
•
Maintain aslow speed.
•
When possible, drive straight up or down
the hill.
•
Slow down when approaching the top of
the hill.
{ Warning
D
riving to the top of ahill at high speed
ca
n cause a crash. There could be a drop-off,
embankment, cliff, or even another vehicle.
You could be seriously injured or killed. As
you near the top of ahill, slow down and
stay alert.
•
Us
e headlamps even during the day to
make the vehicle more visible.
•
Ne
ver go downhill forward or backward
with either the transmission or transfer
case in N (Neutral). The brakes could
overheat and you could lose control.
{ Warning
I
f the vehicle has the two-speed automatic
or
electronic transfer case, shifting the
transfer case to N(Neutral) can cause your
vehicle to roll even if the transmission is
in P(Park). This is because the N(Neutral)
position on the transfer case overrides the
transmission. You or someone else could
be injured. If leaving the vehicle, set the
parking brake and shift the transmission
to P(Park). Shift the transfer case to any
position but N(Neutral).
•
Wh
en driving down ahill, keep the vehicle
headed straight down. Use alow gear
because the engine will work with the
brakes to slow the vehicle and help keep the
vehicle under control.
{ Warning
H
eavy braking when going down ahill can
ca
use your brakes to overheat and fade.
This could cause loss of control and you
or others could be injured or killed. Apply
the brakes lightly when descending ahill
and use alow gear to keep vehicle speed
under control.
•
Av
oid turns that take the vehicle across
the incline of the hill. Driving across an
incline puts more weight on the downhill
wheels, which could cause adownhill slide
or arollover.
•
Loose gravel, muddy spots, or even wet
grass can cause the tires to slip sideways,
downhill. If the vehicle slips sideways, it can
hit something and potentially roll over.
•
Hidden obstacles can make the steepness
of the incline more severe. If arock is
driven across with the uphill wheels, or
if the downhill wheels drop into arut or
depression, the vehicle can tilt even more.