Diesel Exhaust Fluid - Chevrolet Silverado 4500HD 2022 Owner's Manual

208 Driving and Operating
Warning (Continued)
Remember that the temperature of
exhaust gases is high enough to burn
you. You and others could be seriously
injured.
Before starting the manual regeneration,
make sure all of the following safety
conditions are met:
The vehicle is parked on level ground,
away from any flammable materials.
The vehicle is parked outdoors, away
from any walls or buildings.
The vehicle is at least 3 m (10 ft) from
any obstructions or materials that may
combust or melt.
The shift lever is in P (Park).
The fuel tank is at least one-eighth full.
All fluids are at the proper level.
No diagnostic trouble codes have been
set, and the malfunction indicator lamp is
not on.
The engine coolant temperature is above
71 °C (160 °F).
After making sure all of the safety
conditions have been met, press the trip
odometer reset stem or on the steering
wheel control for at least one second to
select Start on the DIC.
Follow the instructions in the DIC messages.
Choose ACCEPT to acknowledge that all of
these safety conditions have been met and
to activate regeneration.
If the DIC returns to the previous screen,
then one or more of the necessary
operating conditions has not been met.
Continue to follow the instructions in the
DIC messages. Press and hold the exhaust
brake switch on the center stack below the
climate controls for more than
three seconds, and then release it, to begin
the regeneration process.
If the EXHAUST BRAKE ON message displays,
then the switch was released too soon.
Press it again to turn off the exhaust brake,
then try again when the DIC message
prompts.
When manual regeneration begins, the
engine speed increases, the engine cooling
fan sound increases, and a DIC message
indicates that cleaning is in progress.
A DIC message will display when cleaning
has completed. The message will remain as
long as cleaning is not necessary. Cleaning
could take up to 30 minutes. Upon
completion, the engine will return to normal
idle, but exhaust components will remain
hot for several minutes. Do not move the
vehicle until the exhaust has had time to
cool. Manual regeneration can be canceled
at any time by pressing the brake pedal or
turning the engine off. Unusual noises may
be heard if regeneration is interrupted.

Diesel Exhaust Fluid

Warning
Avoid getting Diesel Exhaust Fluid (DEF)
on your skin or in your eyes as it could
cause irritation. For more safety,
handling, and storage information, see
the Diesel Exhaust Fluid container label.
Caution
Do not mix fuel with DEF, and do not put
DEF in the fuel tank. This could lead to
costly repairs that might not be covered
by the vehicle warranty.