---
title: "ClearSky Heavy Truck Smog — Clean Truck Check, Brentwood, CA"
description: "ClearSky Heavy Truck Smog in Brentwood, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address…"
url: "https://ctcfinder.com/tester/clearsky-heavy-truck-smog-brentwood/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# ClearSky Heavy Truck Smog

Clean Truck Check tester in Brentwood, CA (Contra Costa 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 | 8175 Brentwood Blvd, Brentwood, CA 94513 |
| County | Contra Costa County |
| Phone | (916) 385-2299 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | No |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks ClearSky Heavy Truck Smog 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 Cruz in Smog Check in Brentwood, about 1 mile away. [See listing](https://ctcfinder.com/tester/cruz-in-smog-check-brentwood/).

## Clean Truck Check testers in Contra Costa County

ClearSky Heavy Truck Smog is one of 61 testing businesses in Contra Costa County on CARB's public tester list. 57 of them offer mobile testing and 38 do smoke opacity tests. In Brentwood itself there are 3 listed businesses, 3 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 ClearSky Heavy Truck Smog offer mobile Clean Truck Check testing?

Yes. ClearSky Heavy Truck Smog 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 ClearSky Heavy Truck Smog test a 2012 or older diesel truck?

ClearSky Heavy Truck Smog does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [Cruz in Smog Check](https://ctcfinder.com/tester/cruz-in-smog-check-brentwood/) (about 1 mile). Trucks from 2013 on get an OBD scan instead.

### How much does ClearSky Heavy Truck Smog charge for a Clean Truck Check?

ClearSky Heavy Truck Smog has not published prices with us; call (916) 385-2299 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 ClearSky Heavy Truck Smog a CARB-credentialed tester?

ClearSky Heavy Truck Smog 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

- **[Cruz in Smog Check](https://ctcfinder.com/tester/cruz-in-smog-check-brentwood/)** — 191 Pippo Ave, Brentwood, CA 94513 — (925) 382-8606 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[DavidL](https://ctcfinder.com/tester/davidl-brentwood/)** — 435 Walnut Blvd, Brentwood, CA 94513 — (925) 605-8197 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Black Diamond Clean Truck Check](https://ctcfinder.com/tester/black-diamond-clean-truck-check-oakley/)** — 3801 Daniel Dr, Oakley, CA 94561 — (925) 305-7586 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Creekside Notary & Consulting](https://ctcfinder.com/tester/creekside-notary-and-consulting-oakley/)** — 100 Heavenly Way, Oakley, CA 94561 — (925) 584-4493 — 5 mi. Services: mobile testing, OBD testing.
- **[E&J Truck and Equipment Repair](https://ctcfinder.com/tester/e-and-j-truck-and-equipment-repair-oakley/)** — Oakley, CA 94561 — (510) 393-2869 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[E&J Truck and Equipment Repair LLC](https://ctcfinder.com/tester/e-and-j-truck-and-equipment-repair-llc-oakley/)** — 115 Muir Ct, Oakley, CA 94561 — (707) 515-8539 — 5 mi. Services: mobile testing, OBD testing.