Why it Matters: This marks the first time Diesel Truck Products Inc. has engaged in federal lobbying. The company retained Duane Morris Government Strategies LLC as regulatory pressure intensifies around diesel emissions enforcement. The timing suggests urgent business concerns about EPA and DOJ actions.

By the Numbers: The company filed its first lobbying registration on September 26, 2025. They hired one lobbyist, John Charles Zang, who lacks congressional experience but has lobbied on transportation and energy issues. No spending amounts have been disclosed yet for this new relationship.

Broader Context: Congress is deeply divided over vehicle emissions standards and EPA authority. Republicans are attacking California’s emissions waiver through legislation like the “Stop CARB Act.” Democrats are pushing back, calling GOP efforts an “unprecedented power grab.” The diesel industry faces increasing regulatory scrutiny over defeat devices and aftermarket parts.

The Agenda: Diesel Truck Products is focusing specifically on “EPA/DOJ Enforcement Policy” under trucking issues. The company appears concerned about enforcement actions against emissions control systems. No specific legislation is mentioned, but the focus suggests concerns about Clean Air Act violations and defeat device crackdowns.

Competitive Landscape: Major players are already active on diesel emissions. Cummins Inc. spent over $500,000 in one quarter on emissions rules. Marathon Petroleum Co. LP lobbied against EPA tailpipe proposals. United Parcel Service spent $2.3 million on environmental and transportation issues.

Between The Lines: The Diesel Emissions Reduction Act offers bipartisan opportunity for industry engagement. Rep. Doris Matsui introduced the House version while Sen. Sheldon Whitehouse led in the Senate. However, no congressional hearings have focused specifically on EPA enforcement against diesel defeat devices. Rep. Troy Nehls is pushing the “Stop CARB Act” while Sen. Shelley Moore Capito leads Senate efforts against California regulations.

The Bottom Line: A first-time lobbying client entering a crowded, polarized field suggests significant regulatory pressure. The company faces established competitors with deeper pockets and longer relationships. Success will depend on finding specific niches in the broader emissions debate.

All data used in this article came from Legis1. Request a demo to learn more!

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