Owner-operated. CARB-certified. Chico-based.
NorCal Mobile HDTC exists to make heavy-duty emissions compliance simple for the fleets and operators who keep Northern California moving.
We bring the shop to your yard.
Sending a truck to a testing station means lost hours and lost revenue. As a mobile operation, we flip that around — the diagnostic equipment comes to your location, so your trucks stay where the work is.
Every inspection is performed personally by a CARB-certified HDTC technician. That means direct answers, consistent quality, and someone who understands both the regulation and the realities of running diesel equipment.
The right tools, on site.
We run professional heavy-duty diagnostics with a Noregon DLA 3.0 XBT adapter — the same class of tool used in commercial shops — to read OBD data accurately and reliably in the field.
Paired with proper Clean Truck Check procedures for qualifying trucks, it means whatever's in your fleet, we can test it correctly the first time.
- Noregon DLA 3.0 XBT heavy-duty diagnostic adapter
- Direct CARB reporting from the field
Committed to keeping your fleet compliant.
California's HD I/M rule isn't going away. We'll help you stay ahead of it — one truck, or a hundred, at a time.