Engine Exhaust; Running The Vehicle While Parked; Automatic Transmission - Chevrolet Silverado 1500 2023 Owner's Manual

220 Driving and Operating

Engine Exhaust

Warning
Engine exhaust contains carbon monoxide
(CO), 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.
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
(Mechanical Shifter) 0 216 or
Shifting Into Park (Electronic Shifter) 0 217
and
Engine Exhaust 0 220.
If parking on a hill and pulling a trailer, see
(Continued)
Driving Characteristics and Towing Tips
0 299.

Automatic Transmission

Automatic Transmission
(Mechanical Shifter)
There is an electronic shift lever position
indicator within the instrument cluster. This
display illuminates when the vehicle is on.
There are several different positions for the
shift lever.
See Driver Mode Control 0 240 and Range
Selection Mode under Manual Mode
(Mechanical Shifter) 0 227 or
Manual Mode (Electronic Shifter) 0 229.
P : This position locks the rear wheels. Use
P (Park) when starting the engine because
the vehicle cannot move easily.
When parked on a hill, especially when the
vehicle has a heavy load, you might notice
an increase in the effort to shift out of