---
title: "Brian Tierney — Clean Truck Check, Vacaville, CA"
description: "Brian Tierney in Vacaville, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/brian-tierney-vacaville/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Brian Tierney

Clean Truck Check tester in Vacaville, CA (Solano 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 | Vacaville, CA 95688 |
| County | Solano County |
| Phone | (707) 363-4083 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Brian Tierney 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 Solano County

Brian Tierney is one of 38 testing businesses in Solano County on CARB's public tester list. 34 of them offer mobile testing and 21 do smoke opacity tests. In Vacaville itself there are 6 listed businesses, 6 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 Brian Tierney offer mobile Clean Truck Check testing?

Yes. Brian Tierney 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 Brian Tierney test a 2012 or older diesel truck?

Yes. Brian Tierney 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 Brian Tierney charge for a Clean Truck Check?

Brian Tierney has not published prices with us; call (707) 363-4083 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 Brian Tierney a CARB-credentialed tester?

Brian Tierney 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

- **[All Sacramento/Bay Area](https://ctcfinder.com/tester/all-sacramento-bay-area-vacaville/)** — Vacaville, CA 95688 — (916) 243-5089 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Buckners Truck Check](https://ctcfinder.com/tester/buckners-truck-check-vacaville/)** — 137 Suncrest Way, Vacaville, CA 95688 — (707) 828-4016 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[C.A.R.B Credentialed Tester- MOBILE TESTING](https://ctcfinder.com/tester/c-a-r-b-credentialed-tester-mobile-testing-vacaville/)** — Vacaville, CA 95688 — (916) 538-7777 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[I505 truck and trailer repair](https://ctcfinder.com/tester/i505-truck-and-trailer-repair-vacaville/)** — 251 Crocker Dr, Vacaville, CA 95688 — (707) 815-2003 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Tommy Bowen](https://ctcfinder.com/tester/tommy-bowen-vacaville/)** — Vacaville, CA 95687 — (707) 330-2331 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Hector Kreitz](https://ctcfinder.com/tester/hector-kreitz-napa/)** — Napa, CA 94558 — (707) 704-9863 — 9 mi. Services: mobile testing, OBD testing.