GMC Duramax 3.0L, Supplement Manual, Page: 13 / 71

Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
12 Instruments and Controls
Diesel Exhaust Fluid
(DEF) Warning Light
This light, a Driver Information
Center (DIC) message, and a chime
come on when there is an issue with
the Diesel Exhaust Fluid.
If the DEF level has not been
corrected, the light will continue to
flash when the vehicle is started.
The vehicle's speed may also be
limited.
Also see Diesel Exhaust Fluid 0 20 .
Information Displays
Driver Information
Center (DIC)
The DIC is in the instrument cluster.
The DIC comes on when the ignition
is on.
A Duramax diesel vehicle may have
the following additional DIC menu
items:
DEF : Displays the Diesel Exhaust
Fluid (DEF) level as a bar graph
with individual segments that
illuminate from Empty (E) to Full (F).
When LOW appears on the display
and the segments turn red, add
DEF as soon as possible. For a
guide on how much DEF to add,
see
Diesel Exhaust Fluid 0 20 .
Fuel Filter Life Remaining : This
display shows an estimate of the
fuel filter's remaining useful life.
If 90% Fuel Filter Life Remaining is
displayed, it means 90% of the
current fuel filter life remains. The
fuel filter life system will alert when
to change the fuel filter on a
schedule consistent with your
driving conditions.
When the remaining fuel filter life is
low, the CHANGE FUEL FILTER
message will appear on the display.
Change the fuel filter as soon as
possible.
Fuel Filter Life Reset : Reset the
Fuel Filter Life Remaining display
after each fuel filter change. It will
not reset itself. Also, be careful not
to reset the display at any time other
than when the fuel filter has just
been changed because it cannot be
reset accurately until the next fuel
filter change. The fuel filter life will
change to 100% when the system
has been reset. To reset the system,
press and hold the thumbwheel for
two seconds while Fuel Filter Life
Remaining is displayed on the DIC.
Engine Air Filter Life : Displays an
estimate of the engine air filter ’ s
remaining useful life and the state of
the system. Engine Air Filter Life
95% means 95% of the current air
filter life remains. Messages will
display based on the engine air filter