---
title: "Sam Dodson — Clean Truck Check, Redding, CA | CTC Finder"
description: "Sam Dodson in Redding, CA is on CARB's Clean Truck Check tester list. Offers OBD testing, smoke opacity (non-OBD) testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/sam-dodson-redding/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Sam Dodson

Clean Truck Check tester in Redding, CA (Shasta 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 | Redding, CA 96003 |
| County | Shasta County |
| Phone | (530) 941-1989 |
| Mobile testing | No |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | No |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Sam Dodson 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 | Not listed |

If you need a tester at your yard, the nearest listed tester that offers mobile testing is The Green Earth Company (Mobile) in Redding, about 1 mile away. [See listing](https://ctcfinder.com/tester/the-green-earth-company-mobile-redding/).

## Clean Truck Check testers in Shasta County

Sam Dodson is one of 18 testing businesses in Shasta County on CARB's public tester list. 16 of them offer mobile testing and 8 do smoke opacity tests. In Redding itself there are 9 listed businesses, 8 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 Sam Dodson offer mobile Clean Truck Check testing?

Not according to CARB's tester list; plan to bring the truck to the tester. The nearest listed mobile tester is [The Green Earth Company (Mobile)](https://ctcfinder.com/tester/the-green-earth-company-mobile-redding/) (about 1 mile).

### Can Sam Dodson test a 2012 or older diesel truck?

Yes. Sam Dodson 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 Sam Dodson charge for a Clean Truck Check?

Sam Dodson has not published prices with us; call (530) 941-1989 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 Sam Dodson a CARB-credentialed tester?

Sam Dodson 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

- **[The Green Earth Company (Mobile)](https://ctcfinder.com/tester/the-green-earth-company-mobile-redding/)** — 582 Olympic St, Redding, CA 96003 — (530) 604-8562 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Gustafsons Mechanical](https://ctcfinder.com/tester/gustafsons-mechanical-shasta-lake/)** — 3548 Shasta Dam Blvd, Shasta Lake, CA 96019 — (530) 917-5509 — 4 mi. Services: mobile testing, OBD testing.
- **[Aaron Rader](https://ctcfinder.com/tester/aaron-rader-palo-cedro/)** — Palo Cedro, CA 96073 — (530) 646-9273 — 8 mi. Services: not listed.
- **[Diesel Emissions Service](https://ctcfinder.com/tester/diesel-emissions-service-redding/)** — 16435 Clear Creek Rd, Redding, CA 96001 — (530) 241-2851 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Clean Truck Check Redding](https://ctcfinder.com/tester/clean-truck-check-redding-redding/)** — 875 Hartnell Ave, Redding, CA 96002 — (530) 351-3987 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[David Duree](https://ctcfinder.com/tester/david-duree-redding/)** — Redding, CA 96002 — (530) 356-3945 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.