GMC Yukon 2025 - Engine Exhaust; Running the Vehicle While Parked; Automatic Transmission

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-17942154) - 2025
Driving and Operating 203
Engine Exhaust
{ Warning
E
ngine exhaust contains carbon monoxide
(C
O), which cannot be seen or smelled.
Exposure to CO can cause unconsciousness
and even death.
Exhaust may enter the vehicle if:
•
The vehicle idles in areas with poor
ventilation (parking garages, tunnels,
deep snow that may block underbody
airflow or tail pipes).
•
The exhaust smells or sounds strange
or different.
•
The exhaust system leaks due to
corrosion or damage.
•
The vehicle exhaust system has
been modified, damaged, or
improperly repaired.
•
There are holes or openings in
the vehicle body from damage or
aftermarket modifications that are not
completely sealed.
(Continued)
Warning (Continued)
If unusual fumes are detected or if it is
suspected that exhaust is coming into
the vehicle:
•
Drive it only with the windows
completely down.
•
Have the vehicle repaired immediately.
Never park the vehicle with the engine
running in an enclosed area such as
agarage or abuilding that has no fresh
air ventilation.
Running the Vehicle While Parked
It
is better not to park with the engine running.
If the vehicle is left with the engine running,
follow the proper steps to be sure the vehicle
will not move. See Shifting Into Park 3201 and
Engine Exhaust 3203.
If parking on ahill and pulling atrailer, see
Driving Characteristics and Towing Tips 3282.
Automatic Transmission
The shift pattern is displayed on the front
of the shift lever. The selected gear position
will illuminate red on the shift lever, while all
others will be displayed in white. If the shift is
not immediate, as in very cold conditions, the
indicator on the shift switch may blink until it
is fully engaged.
{ Warning
I
t is dangerous to get out of the vehicle if
th
e vehicle is not in P (Park) with the parking
brake set. The vehicle can roll.
(Continued)