---
title: "Chad Swearingen — Clean Truck Check, Riverdale, CA"
description: "Chad Swearingen in Riverdale, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/chad-swearingen-riverdale/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Chad Swearingen

Clean Truck Check tester in Riverdale, CA (Fresno 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 | Riverdale, CA 93656 |
| County | Fresno County |
| Phone | (559) 281-4504 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Chad Swearingen 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 | Not listed |
| California-registered motorhome | Same test as above by engine year, once a year | Not listed |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Sanson’s Smoke Testing in Lemoore, about 13 miles away. [See listing](https://ctcfinder.com/tester/sansons-smoke-testing-lemoore/).

## Clean Truck Check testers in Fresno County

Chad Swearingen is one of 123 testing businesses in Fresno County on CARB's public tester list. 102 of them offer mobile testing and 47 do smoke opacity tests.

## 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 Chad Swearingen offer mobile Clean Truck Check testing?

Yes. Chad Swearingen 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 Chad Swearingen test a 2012 or older diesel truck?

Chad Swearingen does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Sanson’s Smoke Testing](https://ctcfinder.com/tester/sansons-smoke-testing-lemoore/) (about 13 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Chad Swearingen charge for a Clean Truck Check?

Chad Swearingen has not published prices with us; call (559) 281-4504 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 Chad Swearingen a CARB-credentialed tester?

Chad Swearingen 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

- **[Kyle Dewey](https://ctcfinder.com/tester/kyle-dewey-riverdale/)** — Riverdale, CA 93656 — (559) 632-3780 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Fresno Equipment](https://ctcfinder.com/tester/fresno-equipment-five-points/)** — 21350 S Lassen Ave, Five Points, CA 93624 — (559) 246-6056 — 12 mi. Services: mobile testing, OBD testing.
- **[Clean Air Services](https://ctcfinder.com/tester/clean-air-services-lemoore/)** — 491 Avalon Dr, Lemoore, CA 93245 — (559) 476-7467 — 13 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Harris Trucking LLC](https://ctcfinder.com/tester/harris-trucking-llc-lemoore/)** — 1315 Chimney Way, Lemoore, CA 93245 — (559) 994-8236 — 13 mi. Services: mobile testing, OBD testing.
- **[Justin Billingsley](https://ctcfinder.com/tester/justin-billingsley-lemoore/)** — Lemoore, CA 93245 — (559) 998-9101 — 13 mi. Services: mobile testing, OBD testing.
- **[Sanson’s Smoke Testing](https://ctcfinder.com/tester/sansons-smoke-testing-lemoore/)** — 862 Bristol Cir, Lemoore, CA 93245 — (559) 864-2644 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.