GMC 2010 T-Series Owner's Manual page 155

Fuel
Diesel Engine Fuel
Notice: Diesel fuel or fuel additives not
recommended in this manual could damage the 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 the engine and emission controls.
We do not test aftermarket diesel fuel
additives. Some additives, particularly those
which contain alcohol or water emulsifiers,
could damage the fuel system. If you believe
that unique circumstances call for a fuel
additive to be used, consult your dealer/
retailer for advice.
If you ever run out of diesel fuel, it can be
difficult to restart the engine. To avoid this,
never let the 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 5 14 tells you how to restart the engine.
What Fuel to Use in The U.S.
Notice: Use of diesel fuel other than Ultra Low
Sulfur Diesel (15 ppm sulfur maximum) will cause
permanent damage to the DPF and related
components. This damage would not be covered
by your warranty.
Both Ultra Low Sulfur Diesel and Low Sulfur Diesel
fuels are available in the United States. The emission
control system requires the use of diesel fuel with ultra
low-sulfur (0.0015% by weight, or 15 ppm, maximum)
content.
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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