---
title: "Capital City Diesel Insp. — Clean Truck Check, North Highlands, CA"
description: "Capital City Diesel Insp. in North Highlands, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD)…"
url: "https://ctcfinder.com/tester/capital-city-diesel-insp-north-highlands/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Capital City Diesel Insp.

Clean Truck Check tester in North Highlands, CA (Sacramento 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 | 4031 Ward Ave, North Highlands, CA 95660 |
| County | Sacramento County |
| Phone | (916) 538-7777 |
| Website | carbdieseltest.com |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Capital City Diesel Insp. 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 Sacramento County

Capital City Diesel Insp. is one of 131 testing businesses in Sacramento County on CARB's public tester list. 118 of them offer mobile testing and 71 do smoke opacity tests. In North Highlands 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 Capital City Diesel Insp. offer mobile Clean Truck Check testing?

Yes. Capital City Diesel Insp. 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 Capital City Diesel Insp. test a 2012 or older diesel truck?

Yes. Capital City Diesel Insp. 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 Capital City Diesel Insp. charge for a Clean Truck Check?

Capital City Diesel Insp. has not published prices with us; call (916) 538-7777 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 Capital City Diesel Insp. a CARB-credentialed tester?

Capital City Diesel Insp. 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

- **[Diesel Kings LLC](https://ctcfinder.com/tester/diesel-kings-llc-north-highlands/)** — 3200 Orange Grove Ave, North Highlands, CA 95660 — (916) 862-2924 — 1 mi. Services: OBD testing, motorhome testing.
- **[Elkhorn Smog](https://ctcfinder.com/tester/elkhorn-smog-north-highlands/)** — 3245 Elkhorn Blvd Suite 9, North Highlands, CA 95660 — (916) 412-0771 — 1 mi. Services: mobile testing, OBD testing.
- **[RunOk Trans](https://ctcfinder.com/tester/runok-trans-north-highlands/)** — North Highlands, CA 95660 — (916) 272-0732 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Safe Auto Transport, Inc](https://ctcfinder.com/tester/safe-auto-transport-inc-north-highlands/)** — 6901 28th St, North Highlands, CA 95660 — (916) 346-9378 — 1 mi. Services: mobile testing, OBD testing.
- **[CHI Transportation](https://ctcfinder.com/tester/chi-transportation-mcclellan/)** — Mcclellan, CA 95652 — (530) 903-6731 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing.
- **[Diesel Emissions Service](https://ctcfinder.com/tester/diesel-emissions-service-mcclellan/)** — 4522 Parker Ave, Mcclellan, CA 95652 — (916) 473-7393 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.