House Pushes Diesel Truck Liberation Act to Rein in EPA Emissions Rules

Key Details Rep. Mike Collins introduced the Diesel Truck Liberation Act on March 26, 2026, aiming to restrict EPA enforcement of diesel emissions mandates. Companion legislation was filed in the Senate by Cynthia Lummis in October 2025. The bill codifies recent Trump Administration EPA actions providing regulatory relief for diesel truck owners and operators. Why It Matters Collins argues the EPA has unfairly treated truckers and farmers like criminals through costly federal emission mandates that provide minimal environmental benefit. Rep. Dave Taylor noted that burdensome regulations since 2007 have made heavy-duty diesel engines more expensive to repair, reduced fuel efficiency, and caused dangerous unplanned downtime for operators and safety risks for other motorists. Immediate Action The EPA has already taken steps to address trucker complaints, including directing manufacturers to update DEF system software to prevent truck derates. On March 27, 2026, the EPA announced guidance removing DEF sensor requirements for all diesel equipment, a move designed to save truckers and farmers significant productivity losses. Support Co-sponsors include Reps. Anna Paulina Luna, Barry Moore, Dave Taylor, Harriet Hageman, Mike Ezell, and Tony Wied. The legislation reflects broader efforts to provide relief for the trucking and farming industries from what supporters call outdated and economically harmful environmental regulations.