Diesel Exhaust Fluid - Chevrolet GMC 2024 Manual

Before starting 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 safety conditions have
been met, press the trip odometer reset
stem or thumbwheel on the steering wheel
for at least one second to select Start on
the infotainment display.
Follow the instructions in the DIC messages.
Touch ACCEPT to acknowledge that all of
these safety conditions have been met and
to activate regeneration.
If the infotainment display returns to the
previous screen, then one or more of the
necessary safety conditions has not been
met. If you cannot determine which
condition has not been met, see
www.gmupfitter.com to contact the GM
Upfitter Integration Group.
Continue to follow the instructions in the
DIC messages. 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 is
complete. 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
Driving and Operating
regeneration can be canceled at any time by
pressing the brake pedal or by 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
Use only DEF that is GM approved,
or fluid containing the API certified or ISO
22241 label. The use of other fluids could
damage the system, requiring costly
repairs that will not be covered by the
vehicle warranty.
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