--- title: "Clean Truck Check Testers in San Lorenzo, CA (3 listed)" description: "Find 3 CARB-credentialed Clean Truck Check testers in San Lorenzo, Alameda County: 3 offer mobile testing, 2 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/alameda-county/san-lorenzo/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in San Lorenzo, CA 3 testing businesses in San Lorenzo (Alameda County) are on CARB's public Clean Truck Check tester list (3 credentialed testers). 3 offer mobile testing, 2 do smoke opacity tests, 0 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 San Lorenzo - **[Clean Air Pro](https://ctcfinder.com/tester/clean-air-pro-san-lorenzo/)** — 17020 Via Chiquita, San Lorenzo, CA 94580 — (510) 314-3969. Services: mobile testing, OBD testing. - **[Doc Bailey Construction](https://ctcfinder.com/tester/doc-bailey-construction-san-lorenzo/)** — 2584 Grant Ave, San Lorenzo, CA 94580 — (510) 935-1290. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Doc Bailey construction equipment, inc](https://ctcfinder.com/tester/doc-bailey-construction-equipment-inc-san-lorenzo/)** — 2584 Grant Ave, San Lorenzo, CA 94580 — (646) 707-1919. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. ## More testers within 20 miles - **[Jaime Morales](https://ctcfinder.com/tester/jaime-morales-san-leandro/)** — San Leandro, CA 94578 — (650) 219-2225 — 2 mi. Services: mobile testing, OBD testing. - **[Mobile Golden State Emissions San Leandro](https://ctcfinder.com/tester/mobile-golden-state-emissions-san-leandro-san-leandro/)** — 15267 Hesperian Blvd., San Leandro, CA 94578 — (925) 818-1831 — 2 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Roadway mobile truck services](https://ctcfinder.com/tester/roadway-mobile-truck-services-san-leandro/)** — 1516 162nd Ave, San Leandro, CA 94578 — (510) 213-2967 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Yazid Kahil](https://ctcfinder.com/tester/yazid-kahil-san-leandro/)** — San Leandro, CA 94578 — (510) 520-3051 — 2 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Anthony Alduncin](https://ctcfinder.com/tester/anthony-alduncin-cherryland/)** — Cherryland, CA 94541 — (650) 921-6363 — 3 mi. Services: mobile testing, OBD testing. - **[VICTOR'S Mobile service](https://ctcfinder.com/tester/victors-mobile-service-hayward/)** — 19451 Waverly Ave, Hayward, CA 94541 — (510) 677-3409 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Bigge Crane & Rigging](https://ctcfinder.com/tester/bigge-crane-and-rigging-san-leandro/)** — 10700 Bigge St, San Leandro, CA 94577 — (510) 330-3372 — 3 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Gan-Trans LTD](https://ctcfinder.com/tester/gan-trans-ltd-san-leandro/)** — San Leandro, CA 94577 — (510) 357-3100 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Pape Kenworth.](https://ctcfinder.com/tester/pape-kenworth-san-leandro/)** — San Leandro, CA 94577 — (510) 335-5085 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[UpTime Direct LLC](https://ctcfinder.com/tester/uptime-direct-llc-san-leandro/)** — 1515 Aurora Dr 203F, San Leandro, CA 94577 — (510) 207-8575 — 3 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Bay Area Mobile Fleet Services](https://ctcfinder.com/tester/bay-area-mobile-fleet-services-hayward/)** — 2283 Dunn Rd, Hayward, CA 94545 — (510) 690-3878 — 3 mi. Services: mobile testing, OBD testing, motorhome testing. - **[DXA Diesel](https://ctcfinder.com/tester/dxa-diesel-hayward/)** — Hayward, CA 94545 — (341) 240-8560 — 3 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in San Lorenzo Alameda County includes the Port of Oakland and the I-880 industrial corridor (Hayward, San Leandro, Fremont). ## 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 San Lorenzo? CTC Finder lists 3 testing businesses in San Lorenzo from CARB's public tester list (3 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 San Lorenzo? Yes. 3 listed businesses in San Lorenzo 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 San Lorenzo? 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 - [San Leandro](https://ctcfinder.com/testers/alameda-county/san-leandro/) — 8 listings, 2 mi - [Hayward](https://ctcfinder.com/testers/alameda-county/hayward/) — 18 listings, 4 mi - [Union City](https://ctcfinder.com/testers/alameda-county/union-city/) — 6 listings, 7 mi - [Oakland](https://ctcfinder.com/testers/alameda-county/oakland/) — 15 listings, 9 mi - [Dublin](https://ctcfinder.com/testers/alameda-county/dublin/) — 4 listings, 13 mi - [Fremont](https://ctcfinder.com/testers/alameda-county/fremont/) — 12 listings, 13 mi - [Newark](https://ctcfinder.com/testers/alameda-county/newark/) — 4 listings, 13 mi - [San Mateo](https://ctcfinder.com/testers/san-mateo-county/san-mateo/) — 4 listings, 13 mi - [Redwood City](https://ctcfinder.com/testers/san-mateo-county/redwood-city/) — 3 listings, 15 mi - [San Francisco](https://ctcfinder.com/testers/san-francisco-county/san-francisco/) — 7 listings, 16 mi