---
title: "TriStar Smog STOCKTON InShop/Mobile WE TEST ALL — Clean Truck Check, Stockton, CA 347 S Commerce St"
description: "TriStar Smog STOCKTON InShop/Mobile WE TEST ALL in Stockton, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity…"
url: "https://ctcfinder.com/tester/tristar-smog-stockton-inshop-mobile-we-test-all-stockton/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# TriStar Smog STOCKTON InShop/Mobile WE TEST ALL

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 | 347 S Commerce St, Stockton, CA 95206 |
| County | San Joaquin County |
| Phone | (209) 565-1173 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks TriStar Smog STOCKTON InShop/Mobile WE TEST ALL 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

TriStar Smog STOCKTON InShop/Mobile WE TEST ALL 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 TriStar Smog STOCKTON InShop/Mobile WE TEST ALL offer mobile Clean Truck Check testing?

Yes. TriStar Smog STOCKTON InShop/Mobile WE TEST ALL 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 TriStar Smog STOCKTON InShop/Mobile WE TEST ALL test a 2012 or older diesel truck?

Yes. TriStar Smog STOCKTON InShop/Mobile WE TEST ALL 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 TriStar Smog STOCKTON InShop/Mobile WE TEST ALL charge for a Clean Truck Check?

TriStar Smog STOCKTON InShop/Mobile WE TEST ALL has not published prices with us; call (209) 565-1173 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 TriStar Smog STOCKTON InShop/Mobile WE TEST ALL a CARB-credentialed tester?

TriStar Smog STOCKTON InShop/Mobile WE TEST ALL appears on CARB's public Clean Truck Check tester list, 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

- **[A&T Fleet Comliance](https://ctcfinder.com/tester/a-and-t-fleet-comliance-stockton/)** — 4450 S Airport Way, Stockton, CA 95206 — (510) 557-4896 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Auto Service El Dorado](https://ctcfinder.com/tester/auto-service-el-dorado-stockton/)** — 2070 S El Dorado St, Stockton, CA 95206 — (408) 431-5360 — 1 mi. Services: OBD testing, motorhome testing.
- **[Nextgenprecisionauto](https://ctcfinder.com/tester/nextgenprecisionauto-stockton/)** — 415 W 5th St, Stockton, CA 95206 — (209) 905-9621 — 1 mi. Services: mobile testing, OBD testing.
- **[Rig master truck repair inc](https://ctcfinder.com/tester/rig-master-truck-repair-inc-stockton/)** — 820 S Pershing Ave, Stockton, CA 95206 — (209) 535-1800 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Simrandeep Singh](https://ctcfinder.com/tester/simrandeep-singh-stockton/)** — Stockton, CA 95206 — (206) 612-9109 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[T & T Mobile Truck Service INC](https://ctcfinder.com/tester/t-and-t-mobile-truck-service-inc-stockton/)** — 4302 Giselle Ln, Stockton, CA 95206 — (408) 690-2460 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.