Clean Truck Check Program – Smog Testing in Concord, CA

76 | Concord, CA | Four Corners Union 76

If you're a truck owner or operator in California, you're likely aware of the Clean Truck Check (CTC) program — formerly known as the Heavy-Duty Inspection and Maintenance (HD I/M) Program. At Four Corners Union 76 in Concord, we're a certified smog check station and ready to help you meet your compliance requirements.

A man wearing blue gloves is working on a car

What is the Clean Truck Check Program?

The California Air Resources Board (CARB) established the Clean Truck Check Program to reduce pollution from heavy-duty vehicles operating in the state. The program requires periodic emissions testing and compliance reporting for:

  • Diesel and alternative-fueled trucks
  • Buses
  • Box trucks
  • Tractor-trailers
  • Other vehicles over 14,000 lbs GVWR

All affected vehicles — whether based in California or out-of-state — must be tested regularly to remain compliant when operating in California.

Is Your Vehicle Covered?

If you drive or manage a heavy-duty vehicle 2008 model year or newer, and it operates in California, it is likely subject to this regulation. Four Corners Union 76 offers Clean Truck Check testing for both diesel and gasoline-powered vehicles over 14,000 lbs.

Your Local Clean Truck Check Station in Concord

At Four Corners Union 76, we provide:

  • CARB-approved Clean Truck Check testing
  • Quick and accurate smog inspections
  • Diesel and heavy-duty smog checks
  • Electronic data reporting to CARB

We use certified testing equipment and stay updated on the latest CARB regulations so your vehicle stays compliant — and on the road.

Why Choose Us?

✔ Convenient location near the Four Corners area of Concord
✔ Licensed STAR-certified smog check station
✔ Fast turnaround for truckers and fleet vehicles
✔ Experienced, professional staff
✔ Competitive pricing

Whether you're an owner-operator or manage a fleet, we make compliance simple and hassle-free.

What to Bring

To complete your Clean Truck Check, be prepared with:

  • VIN and license plate number
  • Current odometer reading
  • Your CARB certificate number (if applicable)

Our team can guide you through the process and answer any questions about registration or reporting.

Schedule Your Test Today

Don't wait for a compliance deadline to sneak up. Stop by Four Corners Union 76 or call us to schedule your Clean Truck Check or smog test. We're committed to helping you stay in compliance and keep California’s air clean.