---
title: "Independent Fleet Services — Clean Truck Check, Modesto, CA"
description: "Independent Fleet Services in Modesto, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing…"
url: "https://ctcfinder.com/tester/independent-fleet-services-modesto/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Independent Fleet Services

Clean Truck Check tester in Modesto, CA (Stanislaus 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 | 217 Winmoore Way, Modesto, CA 95358 |
| County | Stanislaus County |
| Phone | (209) 529-8106 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Independent Fleet Services 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 Stanislaus County

Independent Fleet Services is one of 53 testing businesses in Stanislaus County on CARB's public tester list. 47 of them offer mobile testing and 22 do smoke opacity tests. In Modesto itself there are 23 listed businesses, 21 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 Independent Fleet Services offer mobile Clean Truck Check testing?

Yes. Independent Fleet Services 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 Independent Fleet Services test a 2012 or older diesel truck?

Yes. Independent Fleet Services 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 Independent Fleet Services charge for a Clean Truck Check?

Independent Fleet Services has not published prices with us; call (209) 529-8106 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 Independent Fleet Services a CARB-credentialed tester?

Independent Fleet Services 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

- **[JO Clean Truck Check](https://ctcfinder.com/tester/jo-clean-truck-check-modesto/)** — 2021 Woodland Ave, Modesto, CA 95358 — (209) 326-8839 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Matt Schleiss](https://ctcfinder.com/tester/matt-schleiss-modesto/)** — Modesto, CA 95358 — (209) 480-9556 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[A&B Truck Repair, Inc.](https://ctcfinder.com/tester/a-and-b-truck-repair-inc-modesto-2/)** — 959 S 9th St, Modesto, CA 95351 — (209) 527-6971 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[J And L Complete Automotive Repair Inc.](https://ctcfinder.com/tester/j-and-l-complete-automotive-repair-inc-modesto/)** — 711 Kansas Avenue Ext, Modesto, CA 95351 — (209) 480-0010 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Linarez Transportatoin LLC](https://ctcfinder.com/tester/linarez-transportatoin-llc-modesto/)** — 1632 Woodworth Ave, Modesto, CA 95351 — (209) 416-9298 — 6 mi. Services: OBD testing.
- **[Sousa’s Towing LLC](https://ctcfinder.com/tester/sousas-towing-llc-modesto/)** — 1743 Toto Ct, Modesto, CA 95351 — (209) 566-4696 — 6 mi. Services: mobile testing, OBD testing, motorhome testing.