---
title: "TNT Services Inc — Clean Truck Check, Hayward, CA"
description: "TNT Services Inc in Hayward, CA is on CARB's Clean Truck Check tester list with 2 credentialed testers. Offers mobile testing, OBD testing, smoke opacity…"
url: "https://ctcfinder.com/tester/tnt-services-inc-hayward/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# TNT Services Inc

Clean Truck Check tester in Hayward, 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 | 2235 Dunn Rd, Hayward, CA 94545 |
| County | Alameda County |
| Phone | (510) 570-6257 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 2 |
| Last verified | 2026-11-01 |

## Which trucks TNT Services 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 | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Alameda County

TNT Services 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 Hayward itself there are 18 listed businesses, 17 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 TNT Services Inc offer mobile Clean Truck Check testing?

Yes. TNT Services 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 TNT Services Inc test a 2012 or older diesel truck?

Yes. TNT Services Inc 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 TNT Services Inc charge for a Clean Truck Check?

TNT Services Inc has not published prices with us; call (510) 570-6257 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 TNT Services Inc a CARB-credentialed tester?

TNT Services Inc appears on CARB's public Clean Truck Check tester list with 2 credentialed testers, 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

- **[Bay Area Mobile Fleet Services](https://ctcfinder.com/tester/bay-area-mobile-fleet-services-hayward/)** — 2283 Dunn Rd, Hayward, CA 94545 — (510) 690-3878 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[DXA Diesel](https://ctcfinder.com/tester/dxa-diesel-hayward/)** — Hayward, CA 94545 — (341) 240-8560 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Emporium Auto Center](https://ctcfinder.com/tester/emporium-auto-center-hayward/)** — 2216 American Ave, Hayward, CA 94545 — (510) 822-1032 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Imperial Truck Tire & Trailer Repair](https://ctcfinder.com/tester/imperial-truck-tire-and-trailer-repair-hayward/)** — 3138 Depot Rd, Hayward, CA 94545 — (510) 825-7820 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Joel Resplandor](https://ctcfinder.com/tester/joel-resplandor-hayward/)** — Hayward, CA 94545 — (650) 534-5983 — 1 mi. Services: mobile testing, OBD testing.
- **[Mobile Testing](https://ctcfinder.com/tester/mobile-testing-hayward/)** — 2431 Oliver Dr, Hayward, CA 94545 — (510) 210-7776 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.