• 22 S. State St. Clearfield, UT 84015
  • Main : (801) 525-5000
  • M-F 8am to 5pm

Tampered Diesel Truck Restoration Program

The Tampered Diesel Truck Restoration Program provides financial assistance for diesel trucks that have been tampered or modified so that they no longer meet federal and/or local emissions standards. Tampering may include the alteration or removal of the emissions control components. Several counties along the Wasatch Front, including Davis County, have recently been designated as serious non-attainment areas by the EPA for particulate matter pollution. A diesel truck that has been tampered may emit up to 100 times more pollution than a truck that has not been tampered, which significantly impacts local pollution levels. To legally be registered and operated along the Wasatch Front, these tampered diesel trucks must be restored to their stock configuration. The Davis County Health Department will not seek any penalty or enforcement for diesel vehicle owners that participate to restore their diesel vehicle to a stock configuration through this program. 

Funding for this program was ordered by the court to be paid by Diesel Power Gear for violating the Clean Air Act by tampering with the emissions control devices of diesel trucks.


Owners of tampered diesel trucks that meet all the qualifications listed above can print and fill out a  Tampered Diesel Truck Restoration Program Application and return it to the Davis County Health Department Environmental Health Services Division along with proof of income and proof of vehicle ownership.


Tampered Diesel Applications and Resources

Tampered Diesel Truck Restoration Program Application

How much financial assistance is available to restore a tampered diesel truck?

The amount of financial assistance toward the restoration of a tampered diesel truck depends on the applicant's household income compared to 200% of the Federal Poverty Level.

Those who fall at or below 200% of the Federal Poverty Level qualify for 100% of the restoration cost, up to $6,000.

Those above 200% of the Federal Poverty Level qualify for 75% of the restoration cost, up to $5,000.

Dependents*:200% of the Federal Poverty Level
Each Additional Dependent:+$10,280
*Each household member counts as a dependent. For example, a household with two parents and two children has 4 (four) dependents.

What are the qualifications?

Vehicle Owner Qualifications

The vehicle owner must ...

  • Reside in one of the Clean Air Act non-attainment areas on the Wasatch Front (Includes Cache, Box Elder, Weber, Davis, Salt Lake, Tooele, and Utah counties.)
  • Provide proof of ownership and prove the truck was owned by him/her before June 2023
  • Identify the known or suspected emission control device(s) missing from the truck, and/or the known or suspected defeat parts installed in the truck
  • Have not received assistance under this program for any other tampered truck

Vehicle Qualifications

The vehicle must ...

  • Be a model year 2005 or newer diesel truck
  • Be licensed in Utah
  • Have a Gross Vehicle Weight Rating (GVWR) of 14,000 lbs. or less
  • Have a tampered emission system
    • Missing one or more emission control device, and/or
    • Containing defeat parts that bypass, defeat, or render the emission control device or design inoperative