Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
20
Driving and Operating
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 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.
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. The fluid level in
the DEF tank must be maintained
for the vehicle to run properly. DEF
is not a fuel additive. DEF freezes
when exposed to temperatures
below
−
11 °C (12 °F). For DEF tank
capacity see
It is normal to hear the DEF system
purge fluid back into the tank after
the vehicle is shut off.
