Clean Truck Check Testing in Stockton & the Central Valley
We bring certified OBD and OVI smoke opacity testing to your yard in Stockton, Lodi, Manteca, Tracy, Fairfield, and Vacaville.
Built for Valley fleets
- Agricultural haulers
- Port of Stockton and distribution fleets
- Interstate carriers staging in Fairfield and Vacaville
- Owner-operators who can't afford a day off the road
Stockton & Central Valley pricing
Flat pricing across our Valley coverage area — no travel surcharges. Every test includes same-day CARB CTC-VIS submission.
Stockton services & pricing
Mobile testing at your location for fleets, agricultural operations, and RVs.
HD-OBD Periodic Test
2013+ diesel & 2018+ alt-fuel vehicles.
OVI Smoke Opacity Test
Pre-2013 & non-OBD engines.
Motorhome & RV Testing
Diesel Class A, B, and C.
Full Care Management
Compliance and deadline tracking.
Local crew, local knowledge
Our testers run the Valley routes every week and know the difference between a Lodi vineyard yard and a Tracy cross-dock.
Stockton FAQ
Q: My trucks only run seasonally for harvest. Do they still need testing?
A: If they operate on California public roads over 14,000 lbs GVWR, yes — Clean Truck Check applies.
Q: Can you test multiple trucks in one visit?
A: Yes — fleet visits are our core business.