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using diesel exhaust fluid
Diesel exhaust fluiD (Def)
Diesel Exhaust Fluid (DEF) is a non-flammable fluid comprised of 33%
ammonia-based urea and 67% purified water. DEF is used with diesel engine
exhaust systems to reduce the amount of emissions produced by turning
Nitrogen Oxide (NOx) into nitrogen and water vapor. DEF technology has a
proven track record since it has been used in Europe for years.
Driving range between Def tank refills
The SCR system uses DEF at a rate of about 1 to 1.25% of the vehicle's
diesel fuel usage. A full tank of DEF provides a driving range of about
5,000 miles (8,000 kilometers). Since DEF usage is directly related to fuel
consumption, range will vary depending on driving conditions.
purchasing Def
DEF is available at GM dealerships and most major truck stop chains. GM DEF
is available in a variety of package sizes to service both individual consumers
and fleets, including: 1- and 2.5-gallon jugs, 55-gallon drums and 330-gallon
totes. For your convenience, listed below are the GM part numbers for the
1- and 2.5-gallon sizes.
• 1-gallon part number is 88862659
• 2.5-gallon part number is 88863523
If purchasing DEF outside of a dealership, you
must use API-certified or ISO 22241 labeled DEF.
If you need assistance locating DEF, the U.S.
Department of Energy has a DEF locator
on its website that is regularly updated.
You can visit the website at:
afdc.energy.gov/afdc/locator/def/
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