---
title: "California Clean Truck Check — Clean Truck Check, Stockton, CA"
description: "California Clean Truck Check in Stockton, CA is on CARB's Clean Truck Check tester list with 2 credentialed testers. Offers mobile testing, OBD testing, smoke…"
url: "https://ctcfinder.com/tester/california-clean-truck-check-stockton/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# California Clean Truck Check

Clean Truck Check tester in Stockton, CA (San Joaquin County).

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | 5250 Claremont Ave, Stockton, CA 95207 |
| County | San Joaquin County |
| Phone | (209) 636-7580 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 2 |
| Last verified | 2026-11-01 |

## Which trucks California Clean Truck Check can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in San Joaquin County

California Clean Truck Check is one of 124 testing businesses in San Joaquin County on CARB's public tester list. 111 of them offer mobile testing and 53 do smoke opacity tests. In Stockton itself there are 50 listed businesses, 43 of them mobile.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does California Clean Truck Check offer mobile Clean Truck Check testing?

Yes. California Clean Truck Check says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can California Clean Truck Check test a 2012 or older diesel truck?

Yes. California Clean Truck Check lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does California Clean Truck Check charge for a Clean Truck Check?

California Clean Truck Check has not published prices with us; call (209) 636-7580 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is California Clean Truck Check a CARB-credentialed tester?

California Clean Truck Check appears on CARB's public Clean Truck Check tester list with 2 credentialed testers, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[Lecletus Griffin](https://ctcfinder.com/tester/lecletus-griffin-stockton/)** — Stockton, CA 95207 — (209) 905-9612 — 1 mi. Services: mobile testing, OBD testing.
- **[carbdieseltest.com](https://ctcfinder.com/tester/carbdieseltest-com-stockton/)** — Stockton, CA — (916) 538-7777 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Golden Star Smog](https://ctcfinder.com/tester/golden-star-smog-stockton/)** — 4049 west lane, Stockton, CA 95204 — (209) 981-5142 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Lisa Guerrero](https://ctcfinder.com/tester/lisa-guerrero-stockton/)** — Stockton, CA 95204 — (209) 905-9411 — 2 mi. Services: mobile testing, OBD testing.
- **[Julian Flores](https://ctcfinder.com/tester/julian-flores-stockton/)** — Stockton, CA 95210 — (209) 910-8422 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Khizar rehman](https://ctcfinder.com/tester/khizar-rehman-stockton/)** — Stockton, CA 95210 — (571) 474-8660 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.