---
title: "Sigma — Clean Truck Check, Glendale, CA | CTC Finder"
description: "Sigma in Glendale, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and nearby testers."
url: "https://ctcfinder.com/tester/sigma-glendale/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Sigma

Clean Truck Check tester in Glendale, CA (Los Angeles 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 | 701 West Harvard Street, Glendale, CA 91204 |
| County | Los Angeles County |
| Phone | (818) 415-3426 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Sigma 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 C&L studio rentals in Glendale, about 3 miles away. [See listing](https://ctcfinder.com/tester/c-and-l-studio-rentals-glendale/).

## Clean Truck Check testers in Los Angeles County

Sigma is one of 516 testing businesses in Los Angeles County on CARB's public tester list. 465 of them offer mobile testing and 190 do smoke opacity tests. In Glendale itself there are 5 listed businesses, 4 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 Sigma offer mobile Clean Truck Check testing?

Yes. Sigma 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 Sigma test a 2012 or older diesel truck?

Sigma does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [C&L studio rentals](https://ctcfinder.com/tester/c-and-l-studio-rentals-glendale/) (about 3 miles). Trucks from 2013 on get an OBD scan instead.

### How much does Sigma charge for a Clean Truck Check?

Sigma has not published prices with us; call (818) 415-3426 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 Sigma a CARB-credentialed tester?

Sigma 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

- **[AD Smog Check](https://ctcfinder.com/tester/ad-smog-check-los-angeles/)** — 3900 North Figueroa Street, Los Angeles, CA 90065 — (323) 337-5135 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Albrik's Clean Truck Check & Testing](https://ctcfinder.com/tester/albriks-clean-truck-check-and-testing-glendale/)** — Glendale, CA 91201 — (818) 209-9621 — 3 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[C&L studio rentals](https://ctcfinder.com/tester/c-and-l-studio-rentals-glendale/)** — 531 Hazel St, Glendale, CA 91201 — (818) 335-0064 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Jesse Alexander](https://ctcfinder.com/tester/jesse-alexander-glendale/)** — Glendale, CA 91201 — (714) 833-2211 — 3 mi. Services: not listed.
- **[GreenFleet Clean Truck Check](https://ctcfinder.com/tester/greenfleet-clean-truck-check-glendale/)** — 1990 Crestshire Drive, Glendale, CA 91208 — (818) 522-5562 — 4 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Mauri’s CTC](https://ctcfinder.com/tester/mauris-ctc-los-angeles/)** — Los Angeles, CA 90026 — (661) 644-5126 — 4 mi. Services: mobile testing, OBD testing, motorhome testing.