--- title: "Clean Truck Check Testers in Tracy, CA (21 listed)" description: "Find 21 CARB-credentialed Clean Truck Check testers in Tracy, San Joaquin County: 20 offer mobile testing, 9 do smoke opacity tests. Phone numbers, services…" url: "https://ctcfinder.com/testers/san-joaquin-county/tracy/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Clean Truck Check testers in Tracy, CA 21 testing businesses in Tracy (San Joaquin County) are on CARB's public Clean Truck Check tester list (21 credentialed testers). 20 offer mobile testing, 9 do smoke opacity tests, 15 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 Tracy - **[Aakash Nayyar](https://ctcfinder.com/tester/aakash-nayyar-tracy/)** — Tracy, CA 95304 — (319) 471-5389. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[All star smog](https://ctcfinder.com/tester/all-star-smog-tracy/)** — 3402 Mars Ct Suite 106, Tracy, CA 95377 — (209) 640-1524. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Bihala Fleet Management Inc](https://ctcfinder.com/tester/bihala-fleet-management-inc-tracy/)** — 205 Gandy Dancer Dr, Tracy, CA 95377 — (209) 884-7258. Services: mobile testing, OBD testing, motorhome testing. - **[Bret Cryer](https://ctcfinder.com/tester/bret-cryer-tracy/)** — Tracy, CA 95377 — (925) 922-5346. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Carb Compliance Checkers](https://ctcfinder.com/tester/carb-compliance-checkers-tracy/)** — 2609 Cranston Ct, Tracy, CA 95377 — (510) 378-8058. Services: mobile testing, OBD testing, motorhome testing. - **[Christine's Mobile CTCT](https://ctcfinder.com/tester/christines-mobile-ctct-tracy/)** — 11794 Mountain View Rd, Tracy, CA 95376 — (209) 221-9575. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Diesel Air Defense](https://ctcfinder.com/tester/diesel-air-defense-tracy/)** — 201 S 3rd St, Tracy, CA 95376 — (209) 507-9103. Services: mobile testing, OBD testing, motorhome testing. - **[Have Mechanic Will Travel Inc.](https://ctcfinder.com/tester/have-mechanic-will-travel-inc-tracy/)** — 33030 S Bird Rd, Tracy, CA 95304 — (209) 362-9403. Services: mobile testing, OBD testing. - **[Jasmeet Singh](https://ctcfinder.com/tester/jasmeet-singh-tracy/)** — Tracy, CA 95378 — (209) 834-6100. Services: mobile testing, OBD testing. - **[Joe's Smog Shack Inc.](https://ctcfinder.com/tester/joes-smog-shack-inc-tracy/)** — 500 E 10th St Suite E, Tracy, CA 95376 — (209) 836-4766. Services: OBD testing, motorhome testing. - **[Kutch Mobile Service](https://ctcfinder.com/tester/kutch-mobile-service-tracy/)** — 16866 Midway Rd, Tracy, CA 95377 — (925) 922-2327. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mandhir Singh](https://ctcfinder.com/tester/mandhir-singh-tracy/)** — Tracy, CA 95304 — (209) 597-1170. Services: mobile testing, OBD testing, motorhome testing. - **[Marcelo Mendoza](https://ctcfinder.com/tester/marcelo-mendoza-tracy/)** — Tracy, CA 95391 — (925) 352-0590. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Pavan Kataria](https://ctcfinder.com/tester/pavan-kataria-tracy/)** — Tracy, CA 95377 — (510) 456-8213. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Plugnpass LLC](https://ctcfinder.com/tester/plugnpass-llc-tracy/)** — 231 E Clover Rd, Tracy, CA 95376 — (209) 831-8033. Services: mobile testing, OBD testing. - **[Rakesh reddy Boja](https://ctcfinder.com/tester/rakesh-reddy-boja-tracy/)** — Tracy, CA 95376 — (510) 857-6186. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Sandhu Truck Services](https://ctcfinder.com/tester/sandhu-truck-services-tracy/)** — 1747 Groveview Way, Tracy, CA 95376 — (817) 210-5550. Services: mobile testing, OBD testing, motorhome testing. - **[Sarah Sahota-Dhillon](https://ctcfinder.com/tester/sarah-sahota-dhillon-tracy/)** — Tracy, CA 95377 — (925) 216-0137. Services: mobile testing, OBD testing. - **[Shivali Sharma](https://ctcfinder.com/tester/shivali-sharma-tracy/)** — Tracy, CA 95377 — (209) 666-5889. Services: mobile testing, OBD testing. - **[Speedee Oil Change](https://ctcfinder.com/tester/speedee-oil-change-tracy/)** — Tracy, CA 95376 — (209) 836-1557. Services: mobile testing, OBD testing, motorhome testing. - **[Sunny Nayyar](https://ctcfinder.com/tester/sunny-nayyar-tracy/)** — Tracy, CA 95376 — (209) 221-1435. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. ## More testers within 20 miles - **[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. - **[Apple Xpress](https://ctcfinder.com/tester/apple-xpress-manteca/)** — Manteca, CA 95337 — (209) 629-9196 — 13 mi. Services: mobile testing, OBD testing. - **[Baaz truck and trailer repair](https://ctcfinder.com/tester/baaz-truck-and-trailer-repair-manteca/)** — 1698 Chateau Ln, Manteca, CA 95337 — (510) 363-6007 — 13 mi. Services: mobile testing, OBD testing, motorhome testing. - **[CARB Quick Check](https://ctcfinder.com/tester/carb-quick-check-manteca/)** — 3563 Levanto Way, Manteca, CA 95337 — (510) 786-8378 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Diego Casillas](https://ctcfinder.com/tester/diego-casillas-manteca/)** — Manteca, CA 95337 — (209) 699-0461 — 13 mi. Services: mobile testing, OBD testing, motorhome testing. - **[Imperial Truck Repair](https://ctcfinder.com/tester/imperial-truck-repair-manteca/)** — 2142 W Yosemite Ave, Manteca, CA 95337 — (209) 456-2383 — 13 mi. Services: OBD testing, smoke opacity (non-OBD) testing. - **[Kristy Bui](https://ctcfinder.com/tester/kristy-bui-manteca/)** — Manteca, CA 95337 — (510) 935-6600 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. - **[Nguyen Nguyen](https://ctcfinder.com/tester/nguyen-nguyen-manteca/)** — Manteca, CA 95337 — (408) 874-5500 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing. ## Trucking in Tracy Tracy's distribution centers along I-205 and I-580 serve the Bay Area and Central Valley, so fleet testing at the yard is common. 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 Tracy? CTC Finder lists 21 testing businesses in Tracy from CARB's public tester list (21 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 Tracy? Yes. 20 listed businesses in Tracy 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 Tracy? 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 - [Lathrop](https://ctcfinder.com/testers/san-joaquin-county/lathrop/) — 5 listings, 11 mi - [Livermore](https://ctcfinder.com/testers/alameda-county/livermore/) — 8 listings, 13 mi - [Manteca](https://ctcfinder.com/testers/san-joaquin-county/manteca/) — 19 listings, 15 mi - [French Camp](https://ctcfinder.com/testers/san-joaquin-county/french-camp/) — 3 listings, 15 mi - [Ripon](https://ctcfinder.com/testers/san-joaquin-county/ripon/) — 3 listings, 19 mi - [Brentwood](https://ctcfinder.com/testers/contra-costa-county/brentwood/) — 3 listings, 19 mi - [Stockton](https://ctcfinder.com/testers/san-joaquin-county/stockton/) — 50 listings, 21 mi - [Oakley](https://ctcfinder.com/testers/contra-costa-county/oakley/) — 9 listings, 23 mi - [Dublin](https://ctcfinder.com/testers/alameda-county/dublin/) — 4 listings, 24 mi - [Modesto](https://ctcfinder.com/testers/stanislaus-county/modesto/) — 23 listings, 26 mi