Cynthia Lummis (R-WY)
Diesel Truck Liberation Act of 2025
A Republican bill with 2 Republican cosponsors · See all 2 cosponsors
Last activity — Read twice and referred to the Committee on Environment and Public Works.
In committee
Introduced and handed to a committee in the chamber it started in.
The committee holds it, and most bills are never heard from again. A hearing or a committee vote would be news; silence is the usual outcome, and it kills the bill without anyone voting against it.
Its path through Congress
- Introduced
- In Committee
What this bill would do
The Diesel Truck Liberation Act of 2025 aims to stop the enforcement of laws regarding emissions control devices. It prohibits federal laws, regulations, and Executive orders from requiring the installation, certification, or maintenance of these devices or onboard diagnostic systems on motor vehicles or engines. The bill strips the EPA Administrator of the authority to require such devices under the Clean Air Act or other federal laws. It also prevents civil or criminal liability for the manufacture, sale, purchase, use, or modification of vehicles without these systems. Finally, the act mandates the repeal of existing regulations and the vacating or expunging of related criminal or civil records.
Yes
- Scored +7
Does this shorten or soften prison sentences?
The bill mandates that criminal penalties involving imprisonment for emissions-related conduct be vacated.
- Scored +6
Would business owners be better off under this?
The bill eliminates liability and regulatory burdens for businesses involved in the motor vehicle trade.
- Scored +5
Does this make it easier to run a small business?
The bill reduces compliance and liability costs for those manufacturing or using motor vehicles without emissions equipment.
The opposite
- Scored -9
Does this better protect air, water and wildlife?
The bill strips the EPA of its authority to enforce emissions standards under the Clean Air Act.
- Scored -8
Does this cut the pollution that drives climate change?
The bill removes requirements for emissions control devices and onboard diagnostic systems, which likely increases pollution.
- Scored -5
Does this give the federal government more power?
The bill curtails the regulatory authority of federal agencies like the EPA regarding motor vehicle emissions.
Who it would affect, and how
Potential Positive Impacts for People
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Elimination of Liability: Under Section 2(c), no person or entity will be subject to civil or criminal liability for the manufacture, sale, importation, purchase, use, or modification of a motor vehicle or engine that lacks emissions control devices or onboard diagnostic systems.
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Removal of Penalties: According to Section 2(e), any criminal penalties involving imprisonment related to the described conduct will be vacated.
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Record Clearing: Per Section 2(e)(2), any records of findings regarding criminal or civil liability for the described conduct will be expunged.
Potential Negative Impacts for People
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Loss of Regulatory Oversight: Under Section 2(b), the EPA Administrator loses the authority to promulgate or enforce requirements under the Clean Air Act or other federal laws regarding the installation or maintenance of emissions control devices or onboard diagnostic systems on motor vehicles or engines.
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Repeal of Existing Rules: Section 2(d) dictates that any current regulation related to the installation, modification, or removal of emissions control devices or onboard diagnostic systems on motor vehicles or engines will have no force or effect.
Groups and Interests Ranking
Every group the model scored this bill for, from -10 to +10. Tap or hover a score for the reason it gave.
- Environment Energy And Infrastructure
- Does this better protect air, water and wildlife? — The bill strips the EPA of its authority to enforce emissions standards under the Clean Air Act. Does this cut the pollution that drives climate change? — The bill removes requirements for emissions control devices and onboard diagnostic systems, which likely increases pollution.
- Social Issues And Justice
- Does this shorten or soften prison sentences? — The bill mandates that criminal penalties involving imprisonment for emissions-related conduct be vacated.
- Demographic And Interest Groups
- Would business owners be better off under this? — The bill eliminates liability and regulatory burdens for businesses involved in the motor vehicle trade.
- Economy And Finance
- Does this make it easier to run a small business? — The bill reduces compliance and liability costs for those manufacturing or using motor vehicles without emissions equipment.
- Governance And Ideology
- Does this give the federal government more power? — The bill curtails the regulatory authority of federal agencies like the EPA regarding motor vehicle emissions.
- 3/3/2026
- 1 Cosponsor added.
- 11/4/2025
- 1 Cosponsor added.
- 10/14/2025
- Read twice and referred to the Committee on Environment and Public Works.
- Introduced in Senate
One bill Congress.gov lists as related to this one — companions in the other chamber, earlier versions, and bills this one absorbed or was folded into.
Pete RickettsRepublican · Nebraska
Dan SullivanRepublican · Alaska