CA Carb Compliant Info

All diesel fueled trucks, buses, trailers and transportation refrigeration units operating in California, including those based out of state, are required by regulations to take steps to reduce air pollution. Please call the California Air Resources Board (ARB) Diesel Hotline at 866-6DIESEL (866-634-3735) for more information, or click the links below. Operators are available to answer questions in Spanish and Punjabi.

Reporting and Registration Websites

The California Air Resources Board (ARB) maintains multiple regulatory reporting systems. The need to report depends on the regulatory requirement. A list of regulatory program websites can be found on the Useful Links for Regulations Page under the program description. The regulatory program website typically contains advisories, factsheets, frequently asked questions, compliance tools and program specific contact information. This page gives a brief description of the fleet reporting systems available through the California Air Resources Board (ARB).

Diesel Vehicles

Welcome to the Diesel Vehicles page. By providing a small amount of information on your diesel vehicles we can help guide you on California's diesel vehicle requirements and assist you in finding potential funding programs available to you. The information you provide is anonymous. Use of this website does not fulfill any regulatory reporting requirements. 

See you where you stand by clicking on the link:


Trailers moving through California must meet specific ARB requirements. Trailers may be required to have aerodynamic efficiency components.

All 53-foot or longer box-type trailers (dry vans and reefer vans) that operate at least some of the time in California (no matter where they are registered), may need modifications to meet ARB requirements when operating in California.

Also, all tractors that pull 53-foot or longer box-type trailers on California highways (no matter where they are registered) may need modifications to meet ARB requirements when operating in California.

Additional information can be found at

 Transport Refrigeration Unit (TRU or Reefer)

Applies to in-use diesel-fueled Transport Refrigeration Units (TRUs) and TRU generator sets that operate in California, whether they are registered in or outside the State. This includes all carriers that transport perishable goods using diesel-powered refrigeration systems on trucks, trailers, shipping containers, and railcars that operate in California.

California-based reefers were required to register with ARB by July 31, 2009, or within 30 days of a new or used unit entering a carrier’s control. California terminal operators that operate TRUs were also required to submit Operator Reports by July 31, 2009, and provide updates within 30 days of changes to any information. Enforcement of these requirements began in August 2009.

The first deadline for in-use performance standards for 2001 and older engines was December 31, 2008. Model year 2002 engines were required to comply with in-use standards by December 31, 2009. Enforcement of in-use performance standards began in January 2010. Subsequent model year engines must comply with in-use standards by December 31st of the seventh year after the engine model year.

Additional information can be found at

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CDL Truck Solutions is conveniently located near the areas of Lodi, Stockton, Sacramento, and Elk Grove.