Diesel Vehicles
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Diesel Emissions Program Area The full counties of Boulder, Jefferson, Broomfield, Denver, and Douglas, and the partial counties of Adams and Arapahoe, Larimer, Weld, and El Paso.
Gross Vehicle Weight Rating (GVWR)
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Cost
The diesel emission testing facilities can charge up to one-hour of the posted labor rates. There is no set fee.
Temporarily Exempt Vehicles
Vehicle Emissions Testing Cycles
Light-duty diesels that are 2003 and older are required to have an emissions test every year .
Light-duty diesels that are 2004 and newer are required to have an emissions test every 2 years.
Heavy-duty diesels that are less than 10 model years old are to have an emissions test every 2 years.
Heavy-duty diesels that are more than 10 model years old are to have an emissions test every year.