Chevrolet/GMC Duramax Diesel Supplement (GMNA-Localizing-U.S./Canada-
11354421) - 2018 - CRC - 5/9/17
Driving and Operating
45
4-Cylinder Vans
For 4-cylinder pickups and vans, the
exhaust brake is activated when
Tow/Haul Mode is activated. See
“
Tow/Haul Mode
”
in the owner
manual.
A light comes on in the instrument
cluster when the exhaust brake and
Tow/Haul are activated. The switch
must be pressed at each vehicle
start for the system to be active.
Fuel
Fuel for Diesel Engines
The selection of a high quality fuel
is important for maintaining optimum
performance. Do not use diesel fuel
with more than 15 ppm sulfur
content. Do not use a diesel blend
containing more than 20% biodiesel
by volume. Both diesel and
biodiesel blends must meet all the
requirements as defined in the most
current versions of the local fuel
standards. See the recommended
fuels under
and
Caution
Engine damage may occur if
recommended fuels are not used,
which may void the vehicle
warranty. Some improper
fuels are:
.
Diesel fuel with the addition
of gasoline.
(Continued)
Caution (Continued)
.
Diesel fuel mixed with
engine oil or automatic
transmission fluid.
.
Triglyceride fuels, such as
raw vegetable oil or animal
fat, in any form, including
with blends of diesel or
biodiesel.
.
Marine diesel fuel and
fuel oils.
.
Diesel-water emulsions,
such as Aquazole.
.
Aftermarket diesel fuel
additives, which contain
alcohols, organo-metallic
additives, or water
emulsifiers.
.
Diesel fuel with sulfur
greater than 15 ppm.
.
Diesel-biodiesel blends not
within the required
specification.