Clean Truck Check Credentialed Testers

Is Your Heavy-Duty Vehicle Ready for California's Clean Truck Check?

California requires most heavy-duty vehicles to pass an annual Clean Truck Check emissions test to ensure their emissions control systems are working properly.

This program applies to diesel and alternative fuel vehicles with a Gross Vehicle Weight Rating (GVWR) over 14,000 pounds that operate on California roads and highways—even if the vehicle is registered in another state.

Vehicles that may require testing include:

• Commercial trucks

• Public agency vehicles (federal, state, and local government)

• Motorcoaches

• Transit, shuttle, and school buses

• Hybrid heavy-duty vehicles

• Personal heavy-duty vehicles

• California-registered motorhomes

• Single-vehicle fleets

• Out-of-state vehicles operating in California (excluding motorhomes)

  
  

Important Information

Beginning January 1, 2025, all compliance deadlines require a passing emissions test as part of the Clean Truck Check program.

• Testing must be performed by a CARB Credentialed Tester.

• Passing test results can be submitted up to 90 days before your compliance deadline.

• Early testing allows time to complete any needed repairs before your deadline.

  
  

Failure to comply may result in:

• DMV registration holds

• Enforcement actions

• Potential penalties

  
  

Need Your Clean Truck Check Completed?

We are CARB Credentialed Testers and can help you stay compliant and avoid costly delays. Serving the High Desert Area.

https://ww2.arb.ca.gov/our-work/programs/inspection-and-maintenance-program/credentialed-hd-im-tester-public-list