---
title: "HMSM group inc — Clean Truck Check, Fremont, CA | CTC Finder"
description: "HMSM group inc in Fremont, 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/hmsm-group-inc-fremont/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# HMSM group inc

Clean Truck Check tester in Fremont, CA (Alameda 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 | 43560 Bryant St, Fremont, CA 94539 |
| County | Alameda County |
| Phone | (831) 578-5663 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks HMSM group inc 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 Dora Lopez in Fremont, about 5 miles away. [See listing](https://ctcfinder.com/tester/dora-lopez-fremont/).

## Clean Truck Check testers in Alameda County

HMSM group inc is one of 85 testing businesses in Alameda County on CARB's public tester list. 79 of them offer mobile testing and 37 do smoke opacity tests. In Fremont itself there are 12 listed businesses, 12 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 HMSM group inc offer mobile Clean Truck Check testing?

Yes. HMSM group inc 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 HMSM group inc test a 2012 or older diesel truck?

HMSM group inc does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Dora Lopez](https://ctcfinder.com/tester/dora-lopez-fremont/) (about 5 miles). Trucks from 2013 on get an OBD scan instead.

### How much does HMSM group inc charge for a Clean Truck Check?

HMSM group inc has not published prices with us; call (831) 578-5663 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 HMSM group inc a CARB-credentialed tester?

HMSM group inc 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

- **[Auto Mall Smog Test & Repair](https://ctcfinder.com/tester/auto-mall-smog-test-and-repair-fremont/)** — 43026 Christy St, Fremont, CA 94538 — (510) 493-1865 — 3 mi. Services: mobile testing, OBD testing.
- **[Continental Truck Repair](https://ctcfinder.com/tester/continental-truck-repair-fremont/)** — Fremont, CA 94538 — (510) 709-7512 — 3 mi. Services: mobile testing, OBD testing.
- **[Continental Truck Tire & Trailer Repair](https://ctcfinder.com/tester/continental-truck-tire-and-trailer-repair-fremont/)** — 42400 Boyce Rd, Fremont, CA 94538 — (510) 766-5932 — 3 mi. Services: mobile testing, OBD testing.
- **[Fremont Quick Smog](https://ctcfinder.com/tester/fremont-quick-smog-fremont/)** — 43248 Grimmer Blvd, Fremont, CA 94538 — (510) 270-8555 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Autotek CNG Services](https://ctcfinder.com/tester/autotek-cng-services-fremont/)** — 4299 Peralta Blvd Suite A, Fremont, CA 94536 — (510) 445-3055 — 5 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Dora Lopez](https://ctcfinder.com/tester/dora-lopez-fremont/)** — Fremont, CA 94536 — (650) 208-9960 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.