Bill lets diesel trucks skip clean-air rules in cold areas.

What it does

The bill tells the EPA to let diesel truck makers turn off certain systems. These systems cut engine power when clean-air systems fail in freezing weather. It also lets trucks in far-north regions skip diesel exhaust fluid rules all year. The bill says this helps rural and remote areas. Diesel exhaust fluid is hard to find in those places.

Who it affects

Diesel truck makers and heavy-duty truck makers can build trucks with fewer clean-air systems. People who live and work in cold regions will breathe dirtier air from trucks.

One thing to notice

Truck makers can decide on their own if diesel exhaust fluid is too hard to get. Trucks in far-north areas keep the pass even if they drive in warmer places later.

From the analysis of the bill text, linked under Primary records below.

Where it stands

3 cosponsors: 3 Republicans.

• Nov 6, 2025 — Introduced · Congress.gov: “Introduced in Senate”
• Nov 6, 2025 — Referred to Senate Committee on Environment and Public Works · Congress.gov: “Read twice and referred to the Committee on Environment and Public Works”
• Mar 11, 2026 — Hearing held · Congress.gov: “Committee on Environment and Public Works. Hearings held”
• Sep 16, 2026 — Reported out of committee · Congress.gov: “Committee on Environment and Public Works. Reported by Senator Capito with an amendment in the nature of a…”

Dates and quoted wording are Congress.gov's action record; the timeline shows status changes, not every procedural step.

Money around this bill

6 groups reported lobbying about this bill. They filed 6 reports from Jun 2026 to Jun 2026.

Those reports show $3,733,908 in lobbying spending. Each report lists about 20 bills. So that money was not all for this bill.

More groups named this bill than 82% of bills with any report.

Dan Sullivan, who sponsored the bill, received $2,114,700 from PACs for the 2026 election.

• Caterpillar Inc — $1,142,000 in 1 report
• American Trucking Associations — $720,000 in 1 report
• International Motors, LLC (formerly Navistar, Inc) — $640,000 in 1 report
• Cummins Inc — $521,908 in 1 report
• Volvo Group North America LLC — $430,000 in 1 report

Lobbying is legal. These reports show who lobbied about this bill, not what changed.

Words to know

• diesel exhaust fluid — A liquid that cuts harmful gases from diesel engines.
• EPA — The U.S. agency that sets and enforces clean-air rules.
• dirtier air — Air with more harmful gases and tiny bits of dirt in it.
• lobbying — Trying to influence lawmakers about a bill. Companies and groups pay people to do this.
• PACs — Groups that collect money and give it to candidates for office.
• sponsored — To sponsor a bill is to introduce it in Congress and put your name on it.