--- title: "Clean Truck Check Testers in Turlock, CA (7 listed)" description: "Find 7 CARB-credentialed Clean Truck Check testers in Turlock, Stanislaus County: 6 offer mobile testing, 3 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/stanislaus-county/turlock/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Turlock, CA 7 testing businesses in Turlock (Stanislaus County) are on CARB's public Clean Truck Check tester list (7 credentialed testers). 6 offer mobile testing, 3 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 Turlock - **[AC AG Services, INC.](https://ctcfinder.com/tester/ac-ag-services-inc-turlock/)** — 605 W Clausen Rd, Turlock, CA 95380 — (209) 678-6867. Services: mobile testing, OBD testing. - **[Balswick Quick Smog](https://ctcfinder.com/tester/balswick-quick-smog-turlock/)** — 379 N Golden State Blvd, Turlock, CA 95380 — (209) 216-7132. Services: OBD testing. - **[J Jesus Mendoza Avila](https://ctcfinder.com/tester/j-jesus-mendoza-avila-turlock/)** — Turlock, CA 95380 — (209) 850-5550. Services: mobile testing, OBD testing. - **[Mobile Truck Check Services](https://ctcfinder.com/tester/mobile-truck-check-services-turlock/)** — 2760 Dels Ln, Turlock, CA 95382 — (209) 485-8320. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile Vehicle Inspections](https://ctcfinder.com/tester/mobile-vehicle-inspections-turlock/)** — 3116 Silver Oak Ct, Turlock, CA 95382 — (209) 678-7500. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[No limit hauling & demolition](https://ctcfinder.com/tester/no-limit-hauling-and-demolition-turlock/)** — 2801 Andre Ln, Turlock, CA 95382 — (209) 818-8979. Services: mobile testing, OBD testing. - **[Nolan krasko's diesel smog monsters](https://ctcfinder.com/tester/nolan-kraskos-diesel-smog-monsters-turlock/)** — 120 H St, Turlock, CA 95380 — (305) 260-8458. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[Diesel Pollution Solutions](https://ctcfinder.com/tester/diesel-pollution-solutions-keyes/)** — 4928 Audra Ct, Keyes, CA 95328 — (760) 525-9435 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Ace smog](https://ctcfinder.com/tester/ace-smog-ceres/)** — 2500 Mary Ave, Ceres, CA 95307 — (209) 531-6823 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[All Star Auto Smog](https://ctcfinder.com/tester/all-star-auto-smog-ceres/)** — 1561 E Whitmore Ave, Ceres, CA 95307 — (209) 568-7833 — 6 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Guriqbal Chahal](https://ctcfinder.com/tester/guriqbal-chahal-ceres/)** — Ceres, CA 95307 — (209) 222-0705 — 6 mi. Services: mobile testing, OBD testing. - **[ProMobile Fleet](https://ctcfinder.com/tester/promobile-fleet-ceres/)** — 991 Premier Dr, Ceres, CA 95307 — (209) 769-7925 — 6 mi. Services: mobile testing, OBD testing. - **[Rangi Registration](https://ctcfinder.com/tester/rangi-registration-ceres/)** — 2904 4th St, Ceres, CA 95307 — (209) 480-6516 — 6 mi. Services: OBD testing. - **[Solis Clean Truck Checks](https://ctcfinder.com/tester/solis-clean-truck-checks-ceres/)** — 4467 Faith Home Rd, Ceres, CA 95307 — (209) 996-3687 — 6 mi. Services: mobile testing, OBD testing. - **[Stop Truck Permits](https://ctcfinder.com/tester/stop-truck-permits-ceres/)** — 1320 Tomba Dr, Ceres, CA 95307 — (209) 733-3030 — 6 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Hargreaves Ranches LLC](https://ctcfinder.com/tester/hargreaves-ranches-llc-delhi/)** — 17736 Swanson Rd, Delhi, CA 95315 — (209) 988-7214 — 7 mi. Services: mobile testing, OBD testing. - **[Adrian Martinez](https://ctcfinder.com/tester/adrian-martinez-denair/)** — Denair, CA 95316 — (209) 535-8834 — 11 mi. Services: mobile testing, OBD testing. - **[Andy Rutherford](https://ctcfinder.com/tester/andy-rutherford-denair/)** — Denair, CA 95316 — (209) 605-0970 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Darrell Purdy](https://ctcfinder.com/tester/darrell-purdy-denair/)** — Denair, CA 95316 — (209) 968-5630 — 11 mi. Services: mobile testing, OBD testing. ## Trucking in Turlock Stanislaus County (Modesto, Turlock, Ceres) has many food-processing and agricultural fleets on SR-99. ## 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 Turlock? CTC Finder lists 7 testing businesses in Turlock from CARB's public tester list (7 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 Turlock? Yes. 6 listed businesses in Turlock 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 Turlock? 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 - [Ceres](https://ctcfinder.com/testers/stanislaus-county/ceres/) — 7 listings, 6 mi - [Denair](https://ctcfinder.com/testers/stanislaus-county/denair/) — 4 listings, 11 mi - [Livingston](https://ctcfinder.com/testers/merced-county/livingston/) — 3 listings, 12 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 13 mi - [Atwater](https://ctcfinder.com/testers/merced-county/atwater/) — 5 listings, 17 mi - [Oakdale](https://ctcfinder.com/testers/stanislaus-county/oakdale/) — 5 listings, 21 mi - [Ripon](https://ctcfinder.com/testers/san-joaquin-county/ripon/) — 3 listings, 23 mi - [Escalon](https://ctcfinder.com/testers/san-joaquin-county/escalon/) — 10 listings, 24 mi - [Merced](https://ctcfinder.com/testers/merced-county/merced/) — 13 listings, 25 mi - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 28 mi