--- title: "Clean Truck Check Testers in Susanville, CA (4 listed)" description: "Find 4 CARB-credentialed Clean Truck Check testers in Susanville, Lassen County: 3 offer mobile testing, 1 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/lassen-county/susanville/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Susanville, CA 4 testing businesses in Susanville (Lassen County) are on CARB's public Clean Truck Check tester list (4 credentialed testers). 3 offer mobile testing, 1 do smoke opacity tests, 3 test motorhomes. > 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. ## Testers in Susanville - **[Clayton Harkness](https://ctcfinder.com/tester/clayton-harkness-susanville/)** — Susanville, CA 96130 — (530) 260-1099. Services: OBD testing. - **[Jackson Service Center](https://ctcfinder.com/tester/jackson-service-center-susanville/)** — 2000 Main St, Susanville, CA 96130 — (530) 815-9139. Services: mobile testing, OBD testing, motorhome testing. - **[Lassen Transfer & Storage](https://ctcfinder.com/tester/lassen-transfer-and-storage-susanville/)** — 703-750 Richmond Rd E, Susanville, CA 96130 — (530) 251-7073. Services: mobile testing, OBD testing, motorhome testing. - **[Peterson cat](https://ctcfinder.com/tester/peterson-cat-susanville/)** — Susanville, CA 96130 — (530) 258-6900. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Cost Typical published prices in California: OBD test $50–$135 per vehicle; smoke opacity test $190–$200. Prices are set by each tester. ## Frequently asked questions ### How many Clean Truck Check testers are in Susanville? CTC Finder lists 4 testing businesses in Susanville from CARB's public tester list (4 credentialed testers), last checked November 1, 2026. Listing on CARB's list is optional, so the real number can be higher. ### Is there mobile Clean Truck Check testing in Susanville? Yes. 3 listed businesses in Susanville offer mobile testing, which means the tester comes to your yard. Use the Mobile filter above to see them. ### How much does a Clean Truck Check test cost in Susanville? Testers set their own prices. Published prices for an OBD test are usually $50–$135 per vehicle; smoke opacity tests for older trucks often cost more, and mobile testers may add a trip fee. See the [cost guide](https://ctcfinder.com/guide/cost/). ### How often does my truck need a Clean Truck Check test? 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/). ## Nearby cities