What Is the CARB Clean Truck Check?
The Clean Truck Check (formerly known as the HD I/M program) is a mandatory emissions compliance program by the California Air Resources Board (CARB). It affects nearly all diesel trucks over 14,000 lbs operating in California—including out-of-state vehicles.
If your fleet operates in or passes through California, your vehicles must meet specific testing and reporting requirements to stay compliant.
We Help You Stay CARB-Compliant
- Smoke Opacity Testing
- OBD Inspections for 2013+ Diesel Trucks
- Readiness Checks & Pre-Testing
- Emission System Repairs & Diagnostics
- Reporting Assistance via CARB Database
Direct Truck and Auto Repair is equipped to handle everything you need for Clean Truck Check compliance—all in one stop.
Common Questions
Who is required to comply with the Clean Truck Check?
Diesel vehicles over 14,000 lbs registered in or operating within California must comply. This includes out-of-state vehicles and fleets.
How often do trucks need to be tested?
Testing frequency depends on vehicle age and emissions performance. Most vehicles will need biannual inspections, with newer models eventually moving to annual checks.
Can I perform the test myself?
No. Tests must be performed by certified facilities or using CARB-approved methods. We’re here to help simplify that process.
Schedule Your CARB Compliance Service Today
Don't risk fines or registration holds. Let our expert team handle your Clean Truck Check requirements quickly and professionally.
Call us at (559) 281-3066 or Request an Appointment