Owner’s Manual

Black plate (21,1)
GMC Yukon/Yukon XL Owner Manual - 2011
Driving and Operating 9-21
WARNING (Continued)
If the vehicle is stuck in the snow:
.
Clear away snow from around
the base of your vehicle,
especially any that is blocking
the exhaust pipe.
.
Check again from time to
time to be sure snow does
not collect there.
.
Open a window about 5 cm
(2 in) on the side of the
vehicle that is away from the
wind to bring in fresh air.
.
Fully open the air outlets on
or under the instrument
panel.
(Continued)
WARNING (Continued)
.
Adjust the climate control
system to a setting that
circulates the air inside the
vehicle and set the fan speed
to the highest setting. See
Climate Control System in the
Index.
For more information about
carbon monoxide, see Engine
Exhaust on page 9‑36.
Snow can trap exhaust gases
under your vehicle. This can
cause deadly CO (Carbon
Monoxide) gas to get inside. CO
could overcome you and kill you.
You cannot see it or smell it, so
you might not know it is in your
vehicle. Clear away snow from
around the base of your vehicle,
especially any that is blocking the
exhaust.
Run the engine for short periods
only as needed to keep warm, but
be careful.
To save fuel, run the engine for only
short periods as needed to warm
the vehicle and then shut the engine
off and close the window most of
the way to save heat. Repeat this
until help arrives but only when you
feel really uncomfortable from the
cold. Moving about to keep warm
also helps.
If it takes some time for help to
arrive, now and then when you run
the engine, push the accelerator
pedal slightly so the engine runs
faster than the idle speed. This
keeps the battery charged to restart
the vehicle and to signal for help
with the headlamps. Do this as little
as possible to save fuel.