---
title: "Guynes Equipment — Clean Truck Check, Wheatland, CA"
description: "Guynes Equipment in Wheatland, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby…"
url: "https://ctcfinder.com/tester/guynes-equipment-wheatland/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Guynes Equipment

Clean Truck Check tester in Wheatland, CA (Yuba 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 | 1658 Oakley Ln, Wheatland, CA 95692 |
| County | Yuba County |
| Phone | (530) 237-6427 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Guynes Equipment 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 | Yes |

For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is Capital City Diesel Inspections- TRUCK, BUS, RV in Lincoln, about 10 miles away. [See listing](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/).

## Clean Truck Check testers in Yuba County

Guynes Equipment is one of 8 testing businesses in Yuba County on CARB's public tester list. 6 of them offer mobile testing and 2 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 Guynes Equipment offer mobile Clean Truck Check testing?

Yes. Guynes Equipment 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 Guynes Equipment test a 2012 or older diesel truck?

Guynes Equipment does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Capital City Diesel Inspections- TRUCK, BUS, RV](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/) (about 10 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Guynes Equipment charge for a Clean Truck Check?

Guynes Equipment has not published prices with us; call (530) 237-6427 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 Guynes Equipment a CARB-credentialed tester?

Guynes Equipment 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

- **[Wheatland Smog and Repair](https://ctcfinder.com/tester/wheatland-smog-and-repair-wheatland/)** — 407 Main St, Wheatland, CA 95692 — (530) 308-2479 — 1 mi. Services: OBD testing, motorhome testing.
- **[Packs Water Truck Service INC](https://ctcfinder.com/tester/packs-water-truck-service-inc-sheridan/)** — 4585 Riosa Rd, Sheridan, CA 95681 — (916) 870-3740 — 4 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Affordable C.A.R.B Testing](https://ctcfinder.com/tester/affordable-c-a-r-b-testing-olivehurst/)** — 2040 Newport Ct, Olivehurst, CA 95961 — (916) 370-2379 — 8 mi. Services: mobile testing, OBD testing.
- **[Capital City Diesel Inspections- TRUCK, BUS, RV](https://ctcfinder.com/tester/capital-city-diesel-inspections-truck-bus-rv-lincoln/)** — 69 Lincoln Blvd, Lincoln, CA 95648 — (916) 538-7777 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[EcoEmissions Mobile](https://ctcfinder.com/tester/ecoemissions-mobile-lincoln/)** — 2793 Lindbergh Ln, Lincoln, CA 95648 — (916) 276-1953 — 10 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Lawrence Woo](https://ctcfinder.com/tester/lawrence-woo-lincoln/)** — Lincoln, CA 95648 — (415) 269-0884 — 10 mi. Services: OBD testing.