Lummis Introduces the Diesel Truck Liberation Act to Protect Wyoming Families and Small Businesses from EPA Overreach

October 15, 2025

Washington, D.C. - Senator Cynthia Lummis (R-WY) today introduced The Diesel Truck Liberation Act, legislation to end the Obama and Biden EPA's war on truck owners and mechanics. This bill was inspired by Wyoming resident Troy Lake's weaponized prosecution and imprisonment.

"The Biden EPA threw Troy Lake and other mechanics in prison for keeping school buses, fire trucks, and ambulances running in cold, harsh climates," said Lummis. "When Washington bureaucrats can make you a criminal without Congress ever voting on it, we have a huge problem. I want this overreach to end. Democrats weaponized the EPA to wage war on rural America, and we cannot let that happen again. This legislation is the first step toward justice and sanity."

Background:

• Prohibits the federal government from requiring manufacturers to install or maintain emissions control devices or onboard diagnostic systems.
• Removes EPA authority to enforce Clean Air Act requirements related to vehicle emissions controls.
• Individuals cannot be prosecuted or sued under federal law for tampering or improving emissions equipment.
• Vacates existing prison sentences for emissions-related violations and expunges criminal and civil records related to these offenses.

Read the full bill text here.

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