Aug 12 (Reuters) - Four major truckmakers, including

Daimler and Volvo, sued California to block the state

from enforcing strict emissions standards that U.S. President

Donald Trump declared void in June.

Daimler, Volvo, Paccar ( PCAR ), and International Motors

, formerly Navistar, said they have been "caught in the

crossfire" after Trump reversed waivers issued during the Biden

administration that let California set its own standards.

In a complaint filed on Monday, the truckmakers said Trump's

rescinding U.S. Environmental Protection Agency approval of

California's plan to boost zero-emission heavy-duty truck sales

and reduce nitrogen oxide emissions preempted the state's

enforcement.

They said this included enforcing the Clean Truck Partnership, a

2023 program giving the truckmaking industry flexibility to meet

emissions requirements while advancing California's goal of

lowering emissions.

The truckmakers said the regulatory uncertainty has caused

irreparable harm because they cannot plan production in advance

without knowing which vehicles they will be permitted to sell.

Monday's complaint names the California Air Resources Board

and Democratic Governor Gavin Newsom as defendants, and was

filed in the federal court in Sacramento, the state's capital.

Newsom's office and the board did not immediately respond on

Tuesday to requests for comment.

Trump's action was part of the Republicans' effort to curb

California's power under the federal Clean Air Act to set

tighter pollution limits than federal law requires, and Newsom's

desire to promote electric vehicles as he fights climate change.

California has received more than 100 waivers under the

Clean Air Act since 1970.

During his June signing of joint congressional resolutions,

Trump also blocked California's effort to end sales of

gasoline-only vehicles by 2035.

The state is also suing to undo Trump's actions.

The case is Daimler Truck North America LLC et al v.

California Air Resources Board et al, U.S. District Court,

Eastern District of California, No. 25-02255.