--- title: "Clean Truck Check Testers in Stockton, CA (50 listed)" description: "Find 50 CARB-credentialed Clean Truck Check testers in Stockton, San Joaquin County: 43 offer mobile testing, 26 do smoke opacity tests. Phone numbers…" url: "https://ctcfinder.com/testers/san-joaquin-county/stockton/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Stockton, CA 50 testing businesses in Stockton (San Joaquin County) are on CARB's public Clean Truck Check tester list (51 credentialed testers). 43 offer mobile testing, 26 do smoke opacity tests, 33 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 Stockton - **[California Clean Truck Check](https://ctcfinder.com/tester/california-clean-truck-check-stockton/)** — 5250 Claremont Ave, Stockton, CA 95207 — (209) 636-7580. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[A&A Tow Services Inc](https://ctcfinder.com/tester/a-and-a-tow-services-inc-stockton/)** — 1011 N Broadway Ave, Ste AA, Stockton, CA 95205 — (209) 339-2331. Services: mobile testing, OBD testing. - **[A&G Truck Maintenance](https://ctcfinder.com/tester/a-and-g-truck-maintenance-stockton/)** — 10565 Dnieper Ln, Stockton, CA 95219 — (209) 910-7153. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[A&T Fleet Comliance](https://ctcfinder.com/tester/a-and-t-fleet-comliance-stockton/)** — 4450 S Airport Way, Stockton, CA 95206 — (510) 557-4896. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[A+ Auto Repair](https://ctcfinder.com/tester/a-auto-repair-stockton/)** — 9170 Thornton Rd, Stockton, CA 95209 — (916) 932-3372. Services: mobile testing, OBD testing, motorhome testing. - **[Auto Service El Dorado](https://ctcfinder.com/tester/auto-service-el-dorado-stockton/)** — 2070 S El Dorado St, Stockton, CA 95206 — (408) 431-5360. Services: OBD testing, motorhome testing. - **[Brannon Tire](https://ctcfinder.com/tester/brannon-tire-stockton/)** — 3730 N Wilson Way, Stockton, CA 95205 — (209) 570-9306. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[California's Diesel Mobile Testing LLC.](https://ctcfinder.com/tester/californias-diesel-mobile-testing-llc-stockton/)** — 2245 Learned Ave, Stockton, CA 95205 — (209) 649-1083. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[carbdieseltest.com](https://ctcfinder.com/tester/carbdieseltest-com-stockton/)** — Stockton, CA — (916) 538-7777. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Central California Mobile Repair](https://ctcfinder.com/tester/central-california-mobile-repair-stockton/)** — 2819 W March Ln Suite B6 #162, Stockton, CA 95219 — (209) 438-4689. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Clean Truck Test Near Me](https://ctcfinder.com/tester/clean-truck-test-near-me-stockton/)** — 4255 E Morada Ln, Stockton, CA 95212 — (209) 687-3383. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Convenient Truck and Trailer Repair](https://ctcfinder.com/tester/convenient-truck-and-trailer-repair-stockton/)** — 1684 E Alpine Ave, Stockton, CA 95205 — (209) 715-9053. Services: mobile testing, OBD testing, motorhome testing. - **[Dave's Mobile Truck and Trailer Repair](https://ctcfinder.com/tester/daves-mobile-truck-and-trailer-repair-stockton/)** — 1872 Shimizu Dr, Stockton, CA 95203 — (209) 922-5558. Services: mobile testing, OBD testing, motorhome testing. - **[Diesel Performance INC](https://ctcfinder.com/tester/diesel-performance-inc-stockton/)** — 2804 E Fremont St, Stockton, CA 95205 — (209) 946-0233. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Fateh Truck Repair](https://ctcfinder.com/tester/fateh-truck-repair-stockton/)** — 2915 Munford Ave, Stockton, CA 95205 — (916) 839-8888. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Felipe Chavez](https://ctcfinder.com/tester/felipe-chavez-stockton/)** — Stockton, CA 95215 — (209) 663-5542. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Five Rivers Smog (Clean Truck Check)](https://ctcfinder.com/tester/five-rivers-smog-clean-truck-check-stockton/)** — 3739 Silvana Ln, Stockton, CA 95212 — (209) 407-7417. Services: mobile testing, OBD testing. - **[Gabriel Galvan](https://ctcfinder.com/tester/gabriel-galvan-stockton/)** — Stockton, CA 95219 — (209) 636-9091. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Golden Star Smog](https://ctcfinder.com/tester/golden-star-smog-stockton/)** — 4049 west lane, Stockton, CA 95204 — (209) 981-5142. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Harps Mobile Servcies](https://ctcfinder.com/tester/harps-mobile-servcies-stockton/)** — 3412 E Miner Ave, Stockton, CA 95205 — (209) 423-4632. Services: mobile testing, OBD testing, motorhome testing. - **[Isaias Morfin](https://ctcfinder.com/tester/isaias-morfin-stockton/)** — Stockton, CA 95203 — (209) 623-5336. Services: OBD testing, smoke opacity (non-OBD) testing. - **[Jarvis kustoms](https://ctcfinder.com/tester/jarvis-kustoms-stockton/)** — Stockton, CA 95205 — (209) 992-7503. Services: OBD testing. - **[Julian Flores](https://ctcfinder.com/tester/julian-flores-stockton/)** — Stockton, CA 95210 — (209) 910-8422. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Khizar rehman](https://ctcfinder.com/tester/khizar-rehman-stockton/)** — Stockton, CA 95210 — (571) 474-8660. Services: mobile testing, OBD testing, motorhome testing. - **[Lecletus Griffin](https://ctcfinder.com/tester/lecletus-griffin-stockton/)** — Stockton, CA 95207 — (209) 905-9612. Services: mobile testing, OBD testing. - **[Lisa Guerrero](https://ctcfinder.com/tester/lisa-guerrero-stockton/)** — Stockton, CA 95204 — (209) 905-9411. Services: mobile testing, OBD testing. - **[Lucian Rosselli](https://ctcfinder.com/tester/lucian-rosselli-stockton/)** — Stockton, CA 95203 — (209) 696-0199. Services: not listed. - **[Mad Dog](https://ctcfinder.com/tester/mad-dog-stockton/)** — Stockton, CA 95212 — (559) 806-4244. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Maxim crane](https://ctcfinder.com/tester/maxim-crane-stockton/)** — Stockton, CA 95205 — (209) 418-8251. Services: mobile testing, OBD testing. - **[Mj's Mobile Fleet LLC](https://ctcfinder.com/tester/mjs-mobile-fleet-llc-stockton/)** — 2650 Wigwam Dr Suite J, Stockton, CA 95205 — (408) 661-1489. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Mobile Diesel Doctors INC](https://ctcfinder.com/tester/mobile-diesel-doctors-inc-stockton/)** — 265 S Hinkley Ave, Stockton, CA 95215 — (888) 734-3735. Services: mobile testing, OBD testing, motorhome testing. - **[Mohammad Arshadi](https://ctcfinder.com/tester/mohammad-arshadi-stockton/)** — Stockton, CA 95203 — (916) 280-8902. Services: mobile testing, OBD testing. - **[Mohammad Waseem](https://ctcfinder.com/tester/mohammad-waseem-stockton/)** — Stockton, CA 95212 — (209) 712-3087. Services: mobile testing, OBD testing, motorhome testing. - **[Nextgenprecisionauto](https://ctcfinder.com/tester/nextgenprecisionauto-stockton/)** — 415 W 5th St, Stockton, CA 95206 — (209) 905-9621. Services: mobile testing, OBD testing. - **[Nick Payne](https://ctcfinder.com/tester/nick-payne-stockton/)** — Stockton, CA 95203 — (209) 981-7923. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Noe Rivera](https://ctcfinder.com/tester/noe-rivera-stockton/)** — Stockton, CA 95215 — (209) 337-8506. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Prabhnoor Brar](https://ctcfinder.com/tester/prabhnoor-brar-stockton/)** — Stockton, CA 95212 — (209) 981-1946. Services: OBD testing. - **[Push-N-Weight Transportation llc](https://ctcfinder.com/tester/push-n-weight-transportation-llc-stockton/)** — 2103 E Lafayette St, Stockton, CA 95205 — (209) 598-4145. Services: mobile testing, OBD testing. - **[Ready Set Clean Truck](https://ctcfinder.com/tester/ready-set-clean-truck-stockton/)** — 2244 Totten Ave, Stockton, CA 95205 — (209) 905-6179. Services: mobile testing, OBD testing. - **[Rig master truck repair inc](https://ctcfinder.com/tester/rig-master-truck-repair-inc-stockton/)** — 820 S Pershing Ave, Stockton, CA 95206 — (209) 535-1800. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Ryan Truck Trailer Mobile Service](https://ctcfinder.com/tester/ryan-truck-trailer-mobile-service-stockton/)** — 3612 Farmington Rd, Stockton, CA 95215 — (209) 518-3124. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Simrandeep Singh](https://ctcfinder.com/tester/simrandeep-singh-stockton/)** — Stockton, CA 95206 — (206) 612-9109. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Specialized Service & Repair](https://ctcfinder.com/tester/specialized-service-and-repair-stockton/)** — 4283 N Wilson Way, Stockton, CA 95205 — (209) 628-5674. Services: OBD testing, motorhome testing. - **[T & T Mobile Truck Service INC](https://ctcfinder.com/tester/t-and-t-mobile-truck-service-inc-stockton/)** — 4302 Giselle Ln, Stockton, CA 95206 — (408) 690-2460. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[The Uglymechanic LLC](https://ctcfinder.com/tester/the-uglymechanic-llc-stockton/)** — 7010 Morton Ct, Stockton, CA 95219 — (209) 471-0945. Services: mobile testing, OBD testing. - **[Trevor Nichols](https://ctcfinder.com/tester/trevor-nichols-stockton/)** — Stockton, CA 95215 — (209) 620-7066. Services: mobile testing, OBD testing, motorhome testing. - **[TriStar Smog STOCKTON InShop/Mobile WE TEST ALL](https://ctcfinder.com/tester/tristar-smog-stockton-inshop-mobile-we-test-all-stockton/)** — 347 S Commerce St, Stockton, CA 95206 — (209) 565-1173. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[TriStar Smog STOCKTON InShop/Mobile WE TEST ALL](https://ctcfinder.com/tester/tristar-smog-stockton-inshop-mobile-we-test-all-stockton-2/)** — 347 S Commerce St, Stockton, CA 95203 — (209) 565-1173. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Western Truck](https://ctcfinder.com/tester/western-truck-stockton/)** — 3333 S 99 Frontage Rd, Stockton, CA 95215 — (209) 323-7300. Services: mobile testing. - **[zz TriStar Smog STOCKTON InShop/Mobile WE TEST ALL](https://ctcfinder.com/tester/zz-tristar-smog-stockton-inshop-mobile-we-test-all-stockton/)** — 347 S Commerce Street, Stockton, CA 95205 — (209) 565-1173. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[First Class Service Trucking](https://ctcfinder.com/tester/first-class-service-trucking-french-camp/)** — 161 Transportation Ct, French Camp, CA 95231 — (209) 625-5700 — 7 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Jose Meneses](https://ctcfinder.com/tester/jose-meneses-french-camp/)** — French Camp, CA 95231 — (209) 640-4682 — 7 mi. Services: mobile testing, OBD testing. - **[Leonel Acosta Jaime](https://ctcfinder.com/tester/leonel-acosta-jaime-french-camp/)** — French Camp, CA 95231 — (209) 623-5819 — 7 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Manvir Bhaura](https://ctcfinder.com/tester/manvir-bhaura-lathrop/)** — Lathrop, CA 95330 — (510) 695-4836 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Priscila Vasquez](https://ctcfinder.com/tester/priscila-vasquez-lathrop/)** — Lathrop, CA 95330 — (650) 315-2445 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Rajinder Singh](https://ctcfinder.com/tester/rajinder-singh-lathrop/)** — Lathrop, CA 95330 — (510) 557-6988 — 11 mi. Services: mobile testing, OBD testing. - **[Reliable Registration Svcs INC](https://ctcfinder.com/tester/reliable-registration-svcs-inc-lathrop/)** — 97 Darcy Pkwy, Lathrop, CA 95330 — (209) 670-5264 — 11 mi. Services: not listed. - **[Swift Transportation](https://ctcfinder.com/tester/swift-transportation-lathrop/)** — Lathrop, CA 95330 — (209) 910-7153 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Aaron Stagno](https://ctcfinder.com/tester/aaron-stagno-manteca/)** — Manteca, CA 95336 — (209) 595-6971 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Apex Mobile Truck & RV Check](https://ctcfinder.com/tester/apex-mobile-truck-and-rv-check-manteca/)** — 1230 Higton St, Manteca, CA 95336 — (925) 216-5330 — 11 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[ASR Truck Trailer Repair](https://ctcfinder.com/tester/asr-truck-trailer-repair-manteca/)** — 11151 Venture Way, Manteca, CA 95336 — (209) 905-4427 — 11 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Best Fleet Care INC](https://ctcfinder.com/tester/best-fleet-care-inc-manteca/)** — 578 Commerce Ct, Manteca, CA 95336 — (209) 414-1817 — 11 mi. Services: not listed. ## Trucking in Stockton Stockton combines the Port of Stockton, I-5 and SR-99, and a growing cluster of distribution centers. Many Northern California fleets are based here. San Joaquin County (Stockton, Tracy, Manteca, Lathrop) is a major Northern California distribution-center region, with the Port of Stockton on the San Joaquin River. ## 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 Stockton? CTC Finder lists 50 testing businesses in Stockton from CARB's public tester list (51 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 Stockton? Yes. 43 listed businesses in Stockton 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 Stockton? 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 - [French Camp](https://ctcfinder.com/testers/san-joaquin-county/french-camp/) — 3 listings, 7 mi - [Lathrop](https://ctcfinder.com/testers/san-joaquin-county/lathrop/) — 5 listings, 11 mi - [Lodi](https://ctcfinder.com/testers/san-joaquin-county/lodi/) — 12 listings, 12 mi - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 14 mi - [Ripon](https://ctcfinder.com/testers/san-joaquin-county/ripon/) — 3 listings, 18 mi - [Escalon](https://ctcfinder.com/testers/san-joaquin-county/escalon/) — 10 listings, 19 mi - [Tracy](https://ctcfinder.com/testers/san-joaquin-county/tracy/) — 21 listings, 21 mi - [Galt](https://ctcfinder.com/testers/sacramento-county/galt/) — 7 listings, 21 mi - [Oakley](https://ctcfinder.com/testers/contra-costa-county/oakley/) — 9 listings, 21 mi - [Brentwood](https://ctcfinder.com/testers/contra-costa-county/brentwood/) — 3 listings, 21 mi