Silverado 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
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 Consensus Position - Joint EMA/TMC Pump Grade
Specification for Premium Diesel Fuel, could provide better starting, less noise, and better vehicle performance. If there are questions about the fuel you
are using, contact your fuel supplier.
In the United States, for best results use No. 2-D diesel fuel year-round (above and below freezing conditions) as oil companies blend No. 2-D fuel to
address climate differences. No. 1-D diesel fuel can be used in very cold temperatures (when it stays below 0°F or -18°C); however, it will produce a
power and fuel economy loss. Avoid the use of No. 1-D diesel fuel in warm or hot climates. It can result in stalling, poor starting when the engine is hot,
and could damage the fuel injection system.
Because of the cleansing properties of biodiesel, switching from straight diesel to a biodiesel blend can prematurely restrict the fuel filter with normal
deposits in the fuel system. A fuel filter replacement might be required sooner than the recommended interval.
What Fuels to Use - Canada
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.
At a minimum, the diesel fuel you use should meet the latest version of specification CAN/CGSB-3.517 (ULS) in Canada. In addition, the Engine
Manufacturers Association (EMA) has identified properties of an improved diesel fuel for better engine performance and durability (EMA Consensus
Position - Joint EMA/TMC Pump Grade Specification for Premium Diesel Fuel). Diesel fuels corresponding to the EMA description could provide
better starting, less noise, and better vehicle performance. If there are questions about the fuel you are using, contact your fuel supplier.
Canadian fuels are blended for seasonal changes. Diesel Type "A" fuel is blended for better cold weather starting (below 0°F or -18°C); however, you
might notice some power and fuel economy loss. If Type "A" fuel is used in warmer temperatures, stalling and hard starting may occur. Diesel Type "B"
fuel is blended for temperatures above 0°F (-18°C).
Biodiesel Fuels
It is acceptable to use diesel fuel containing up to 5% biodiesel (B5), but the final blended fuel must meet the same specification, ASTM D 975 (Grades
No. 2-D or No. 1 -D S15 commonly known as Ultra Low Sulfur diesel), as other fuels used in your vehicle, and the biodiesel used for making this fuel
must meet the latest version of ASTM specification D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modified
to reduce the possibility of damage to the fuel system and engine. Higher concentration (i.e. greater than B5) biodiesel-containing fuels or the use of
unmodified bio-oils blended into diesel fuel at any concentration is not recommended and could damage the fuel system and engine. Such damage would
not be covered by your warranty. If there are questions about the biodiesel-containing fuels you are using, contact your fuel supplier.
See your Duramax(TM) Diesel Owners Manual for additional information.
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