Diesel Exhaust Fluid - GMC CHEVROLET Silverado 6500HD 2019 Owner's Manual

220 Driving and Operating
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.
Diesel Exhaust Fluid (DEF) is used
with diesel engines to reduce the
amount of regulated emissions
produced. Products such as AdBlue
are types of DEF, and are approved
for use in the vehicle as long as
they have an API certification label