Running The Vehicle While Parked - GMC 2010 Yukon/Yukon XL Owner's Manual

Running the Vehicle While Parked

It is better not to park with the engine running. But if you
ever have to, here are some things to know.
WARNING:
Idling a vehicle in an enclosed area with poor
ventilation is dangerous. Engine exhaust may
enter the vehicle. Engine exhaust contains
Carbon Monoxide (CO) which cannot be seen
or smelled. It can cause unconsciousness and
even death. Never run the engine in an enclosed
area that has no fresh air ventilation. For more
information, see Engine Exhaust on page 3 52.
WARNING:
It can be dangerous to get out of the vehicle
if the automatic transmission shift lever is not
fully in P (Park) with the parking brake firmly set.
The vehicle can roll. Do not leave the vehicle
when the engine is running unless you have to.
WARNING: (Continued)
If you have left the engine running, the vehicle
can move suddenly. You or others could be
injured. To be sure the vehicle will not move, even
when you are on fairly level ground, always set
the parking brake and move the shift lever to
P (Park).
If the vehicle has a four-wheel drive transfer case
with a N (Neutral) position, and the transfer case
is in N (Neutral), the vehicle may roll, even if the
automatic transmission shift lever is in P (Park).
So, be sure the transfer case is in a drive
gear
parking brake.
Follow the proper steps to be sure the vehicle will not
move. See Shifting Into Park on page 3 49.
If pulling a trailer, see Towing a Trailer on page 5 49.
(Continued)
WARNING:
not in N (Neutral). Always set the
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