--- title: "Clean Truck Check Testers in Oakdale, CA (5 listed)" description: "Find 5 CARB-credentialed Clean Truck Check testers in Oakdale, Stanislaus County: 5 offer mobile testing, 2 do smoke opacity tests. Phone numbers, services and…" url: "https://ctcfinder.com/testers/stanislaus-county/oakdale/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Oakdale, CA 5 testing businesses in Oakdale (Stanislaus County) are on CARB's public Clean Truck Check tester list (5 credentialed testers). 5 offer mobile testing, 2 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 Oakdale - **[Chris Horton](https://ctcfinder.com/tester/chris-horton-oakdale/)** — Oakdale, CA 95361 — (510) 697-9505. Services: mobile testing, OBD testing, motorhome testing. - **[John Pascale](https://ctcfinder.com/tester/john-pascale-oakdale/)** — Oakdale, CA 95361 — (209) 480-4814. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[K7 Group LLC](https://ctcfinder.com/tester/k7-group-llc-oakdale/)** — 7243 Autrey Ct, Oakdale, CA 95361 — (916) 346-6730. Services: mobile testing, OBD testing. - **[Monkey's Smog Center](https://ctcfinder.com/tester/monkeys-smog-center-oakdale/)** — 217 W F St, Oakdale, CA 95361 — (209) 595-6293. Services: mobile testing, OBD testing. - **[Steven Ingram](https://ctcfinder.com/tester/steven-ingram-oakdale/)** — Oakdale, CA 95361 — (209) 612-9844. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[Coast Machine Inc](https://ctcfinder.com/tester/coast-machine-inc-copperopolis/)** — 5615 Chuckwagon Dr, Copperopolis, CA 95228 — (650) 444-4945 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Freedom smog](https://ctcfinder.com/tester/freedom-smog-riverbank/)** — 2660 Patterson Rd, Riverbank, CA 95367 — (209) 622-9156 — 10 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Robert Mendes](https://ctcfinder.com/tester/robert-mendes-modesto/)** — Modesto, CA 95357 — (209) 585-6786 — 10 mi. Services: mobile testing, OBD testing. - **[A&B Truck repair, Inc.](https://ctcfinder.com/tester/a-and-b-truck-repair-inc-modesto/)** — 959 S 9th St, Modesto, CA 95355 — (209) 527-6971 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[CleanTruck209](https://ctcfinder.com/tester/cleantruck209-modesto/)** — 2708 Deerfield Pl, Modesto, CA 95355 — (209) 556-2254 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[JM Transportation LLC](https://ctcfinder.com/tester/jm-transportation-llc-modesto/)** — 3305 Copeland Ct, Modesto, CA 95355 — (408) 512-7925 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Smog & DMV](https://ctcfinder.com/tester/smog-and-dmv-modesto/)** — 1616 Oakdale Rd Suite 1, Modesto, CA 95355 — (209) 735-1241 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Brazil Dairy Transport](https://ctcfinder.com/tester/brazil-dairy-transport-escalon/)** — 11535 S Henry Rd, Escalon, CA 95320 — (209) 985-2410 — 12 mi. Services: mobile testing, OBD testing. - **[Dillon Dunson](https://ctcfinder.com/tester/dillon-dunson-escalon/)** — Escalon, CA 95320 — (209) 816-0119 — 12 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Dimas Sousa](https://ctcfinder.com/tester/dimas-sousa-escalon/)** — Escalon, CA 95320 — (209) 456-2252 — 12 mi. Services: mobile testing, OBD testing. - **[Elias Rodriguez](https://ctcfinder.com/tester/elias-rodriguez-escalon/)** — Escalon, CA 95320 — (916) 271-1787 — 12 mi. Services: mobile testing, OBD testing. - **[Gastelum Truck and Trailer Repair LLC](https://ctcfinder.com/tester/gastelum-truck-and-trailer-repair-llc-escalon/)** — 22323 State Highway 120, Escalon, CA 95320 — (209) 701-9838 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## Trucking in Oakdale 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 Oakdale? CTC Finder lists 5 testing businesses in Oakdale from CARB's public tester list (5 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 Oakdale? Yes. 5 listed businesses in Oakdale 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 Oakdale? 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 - [Escalon](https://ctcfinder.com/testers/san-joaquin-county/escalon/) — 10 listings, 12 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 15 mi - [Denair](https://ctcfinder.com/testers/stanislaus-county/denair/) — 4 listings, 19 mi - [Ripon](https://ctcfinder.com/testers/san-joaquin-county/ripon/) — 3 listings, 19 mi - [Ceres](https://ctcfinder.com/testers/stanislaus-county/ceres/) — 7 listings, 19 mi - [Angels Camp](https://ctcfinder.com/testers/calaveras-county/angels-camp/) — 3 listings, 21 mi - [Turlock](https://ctcfinder.com/testers/stanislaus-county/turlock/) — 7 listings, 21 mi - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 24 mi - [Valley Springs](https://ctcfinder.com/testers/calaveras-county/valley-springs/) — 3 listings, 26 mi - [Sonora](https://ctcfinder.com/testers/tuolumne-county/sonora/) — 5 listings, 27 mi