---
title: "All star smog — Clean Truck Check, Tracy, CA | CTC Finder"
description: "All star smog in Tracy, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing…"
url: "https://ctcfinder.com/tester/all-star-smog-tracy/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# All star smog

Clean Truck Check tester in Tracy, 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 | 3402 Mars Ct Suite 106, Tracy, CA 95377 |
| County | San Joaquin County |
| Phone | (209) 640-1524 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks All star smog 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

All star smog 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 Tracy itself there are 21 listed businesses, 20 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 All star smog offer mobile Clean Truck Check testing?

Yes. All star smog 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 All star smog test a 2012 or older diesel truck?

Yes. All star smog 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 All star smog charge for a Clean Truck Check?

All star smog has not published prices with us; call (209) 640-1524 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 All star smog a CARB-credentialed tester?

All star smog 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

- **[Bihala Fleet Management Inc](https://ctcfinder.com/tester/bihala-fleet-management-inc-tracy/)** — 205 Gandy Dancer Dr, Tracy, CA 95377 — (209) 884-7258 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Bret Cryer](https://ctcfinder.com/tester/bret-cryer-tracy/)** — Tracy, CA 95377 — (925) 922-5346 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Carb Compliance Checkers](https://ctcfinder.com/tester/carb-compliance-checkers-tracy/)** — 2609 Cranston Ct, Tracy, CA 95377 — (510) 378-8058 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Kutch Mobile Service](https://ctcfinder.com/tester/kutch-mobile-service-tracy/)** — 16866 Midway Rd, Tracy, CA 95377 — (925) 922-2327 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Pavan Kataria](https://ctcfinder.com/tester/pavan-kataria-tracy/)** — Tracy, CA 95377 — (510) 456-8213 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Sarah Sahota-Dhillon](https://ctcfinder.com/tester/sarah-sahota-dhillon-tracy/)** — Tracy, CA 95377 — (925) 216-0137 — 1 mi. Services: mobile testing, OBD testing.