The Diesel Hotline is experiencing longer than normal wait times. Please contact us for all of your on-road heavy-duty vehicle compliance assistance needs.
Due to current events, processing of compliance documentation mailed in by hard copy may take longer than usual. For quicker service processing of your compliance documentation, please email a scanned copy of your documents to TRUCRS@arb.ca.gov. Include your TRUCRS ID number, detailed description of request, any applicable VIN(s) and your call-back information. Faxing of documentation is currently not available. You can also email your compliance questions to the Diesel Hotline at 8666DIESEL@arb.ca.gov and include a detailed description of your situation and any applicable VIN(s).
Thank you for your patience as we work diligently to keep things running smoothly during these challenging times.