Fuel
Diesel Engine Fuel
Notice: Diesel fuel or fuel additives not
recommended in this manual could damage
your fuel system and engine. Your warranty
would not cover this damage. And:
• Diesel fuel that has been mixed with
engine oil or automatic transmission fluid
could damage your engine and emission
controls.
• Aftermarket diesel fuel additives are not
tested by General Motors. Some additives,
particularly those which contain alcohol
or water emulsifiers, may damage your
fuel system. If you believe that unique
circumstances call for a fuel additive to
be used, consult your dealer for advice.
• If you ever run out of diesel fuel, it can be
difficult to restart your engine. To avoid
this, never let your tank get empty.
If gasoline is ever accidentally added to the fuel
tank, to avoid severe engine damage, do not run
the engine until the fuel tank can be drained.
If you run out of fuel, Running Out of Fuel on
page 203 tells you how to restart your engine.
What Fuel to Use
Notice: Use of diesel fuel other than Ultra
Low Sulfur Diesel (15 ppm sulfur maximum)
or engine oil other than low ash CJ-4 oil
will cause permanent damage to the DPF
and related components. This damage
would not be covered by your warranty.
The emission control system requires the use of
diesel fuel with ultra low-sulfur (0.0015% by weight,
or 15 ppm, maximum) content. Both Ultra Low
Sulfur Diesel and Low Sulfur Diesel fuels are
available in the United States and Ultra Low Sulfur
Diesel fuel is available in Canada. However, only
higher sulfur diesel fuel is available in Mexico.
At a minimum, the diesel fuel you use should meet
the latest version of ASTM specification D 975
(Grades No. 2-D or No. 1-D S15 commonly known
as Ultra Low Sulfur diesel) in the United States.
In addition, the Engine Manufacturers Association
(EMA) has identified properties of an improved
diesel fuel for better engine performance and
durability. Diesel fuels corresponding to the EMA
Recommended Guideline on Premium Diesel Fuel
(FQP-1A) could provide better starting, less noise,
and better vehicle performance. If there are
questions about the fuel you are using, contact
your fuel supplier.
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