---
title: "White Diamond Tester — Clean Truck Check, San Jose, CA"
description: "White Diamond Tester in San Jose, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…"
url: "https://ctcfinder.com/tester/white-diamond-tester-san-jose/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# White Diamond Tester

Clean Truck Check tester in San Jose, CA (Santa Clara 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 | 63 Grandwell Way, San Jose, CA 95138 |
| County | Santa Clara County |
| Phone | (408) 603-9715 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks White Diamond Tester 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 Raul Rivas in San Jose, about 5 miles away. [See listing](https://ctcfinder.com/tester/raul-rivas-san-jose/).

## Clean Truck Check testers in Santa Clara County

White Diamond Tester is one of 79 testing businesses in Santa Clara County on CARB's public tester list. 67 of them offer mobile testing and 27 do smoke opacity tests. In San Jose itself there are 41 listed businesses, 36 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 White Diamond Tester offer mobile Clean Truck Check testing?

Yes. White Diamond Tester 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 White Diamond Tester test a 2012 or older diesel truck?

White Diamond Tester does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Raul Rivas](https://ctcfinder.com/tester/raul-rivas-san-jose/) (about 5 miles). Trucks from 2013 on get an OBD scan instead.

### How much does White Diamond Tester charge for a Clean Truck Check?

White Diamond Tester has not published prices with us; call (408) 603-9715 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 White Diamond Tester a CARB-credentialed tester?

White Diamond Tester 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

- **[San Jose clean truck check](https://ctcfinder.com/tester/san-jose-clean-truck-check-san-jose/)** — 5564 Monterey Rd, San Jose, CA 95138 — (209) 996-5923 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[James Risher](https://ctcfinder.com/tester/james-risher-san-jose/)** — San Jose, CA 95123 — (775) 781-0679 — 5 mi. Services: mobile testing, OBD testing.
- **[Reo Inc-Stchevron](https://ctcfinder.com/tester/reo-inc-stchevron-san-jose/)** — 6096 Cottle Rd, San Jose, CA 95123 — (408) 226-7414 — 5 mi. Services: OBD testing, motorhome testing.
- **[Roberto Garcia](https://ctcfinder.com/tester/roberto-garcia-san-jose/)** — San Jose, CA 95123 — (669) 286-6463 — 5 mi. Services: mobile testing, OBD testing.
- **[Raul Rivas](https://ctcfinder.com/tester/raul-rivas-san-jose/)** — San Jose, CA 95111 — (408) 422-3861 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Andrew Le](https://ctcfinder.com/tester/andrew-le-san-jose/)** — San Jose, CA 95121 — (408) 805-9671 — 5 mi. Services: mobile testing, OBD testing, motorhome testing.