Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/1/21
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Driving and Operating
If you hold the switch at the +RES position,
the vehicle will keep going faster until you
release the switch or apply the brake. So
unless you want to go faster, do not hold
the switch at the +RES position.
Exhaust Brake Function
Diesel Vehicles Equipped with Exhaust
Brake-interlocked Cruise
Automatic activation of the exhaust brake
during cruise control driving suppresses an
increase in the speed on a downhill slope,
decreasing the need for the driver to apply
the regular brake pedal. The exhaust brake
does not activate when the exhaust brake
switch is turn off.
The maximum slope angle at which the
system can control the vehicle speed
increase is different depending on the load
the vehicle is carrying.
Automatic Activation and Automatic Release
of Exhaust Brake
The exhaust brake is engaged when the
vehicle speed exceeds the set speed on a
downhill slope.
The exhaust brake is disengaged when the
vehicle slows down close to the set.
Fuel
Fuel for Diesel Engines
Diesel Fuel Requirement and Fuel
System
Fuel Requirements
In order to meet emission regulations,
ultra-low-sulfur diesel fuel is required for
correct operation of the aftertreatment
system. If ultra-low-sulfur diesel fuel is not
used, the aftertreatment system could
possibly be damaged.
The fuel supply pump, injector or other
parts of the fuel system and engine can be
damaged if you use any fuel or fuel additive
other than those specifically recommended
by GM and Cummins.
To help avoid fuel system or engine
damage, pay attention to the following:
.
Some service stations mix used engine oil
with diesel fuel. Some manufacturers of
large diesel engines allow this. However,
for your diesel engine, do not use diesel
fuel which has been contaminated with
engine oil. Besides causing engine
damage, such fuel can also affect
emission control. Before using any diesel
fuel, check with the service station
operator to see if the fuel has been
mixed with engine oil.
.
Take care not to run out of diesel fuel.
If you do run out of fuel, you may need
to bleed air out of the supply pump to
re-start the engine after fuel has been
filled.
Your vehicle is designed to use either
Number 1-D or Number 2-D diesel fuel. For
additional details about fuel requirements
for your vehicle's Cummins diesel engine,
please refer to the Cummins Owner's
Manual or contact your local Cummins
Dealer.
Biodiesel
Please refer to the Cummins Owner's
Manual or contact your local Cummins
Dealer for details about using Biodiesel.
Cold Weather Operation
Diesel fuel is sensitive to temperature. All
diesel fuel has a certain amount of paraffin
components, which are high in energy value
and help improve fuel economy. But, when
temperatures are below -7 °C (20 °F), the
paraffin components begin turning into wax