--- title: "Sierra Services — Clean Truck Check, Valley Springs, CA" description: "Sierra Services in Valley Springs, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, motorhome testing. Phone, address and…" url: "https://ctcfinder.com/tester/sierra-services-valley-springs/" updated: "2026-11-01" publisher: "CTC Finder (independent directory, not affiliated with CARB)" --- # Sierra Services Clean Truck Check tester in Valley Springs, CA (Calaveras County). > 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. | Field | Value | |---|---| | Location | 5010 Olive Orchard Road, Valley Springs, CA 95252 | | County | Calaveras County | | Phone | (209) 914-0388 | | Mobile testing | Yes | | OBD testing | Yes | | Smoke opacity (non-OBD) | No | | Motorhomes | Yes | | Credentialed testers | 1 | | Last verified | 2026-11-01 | ## Which trucks Sierra Services can test | Your vehicle | Test required | This tester | |---|---|---| | Diesel, model year 2013 or newer | OBD scan | Yes | | Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes | | Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Not listed | | California-registered motorhome | Same test as above by engine year, once a year | Yes | For a 2012 or older diesel, the nearest listed tester with smoke opacity testing is A&T Mobile Vin Verification in Valley Springs, about 1 mile away. [See listing](https://ctcfinder.com/tester/a-and-t-mobile-vin-verification-valley-springs/). ## Clean Truck Check testers in Calaveras County Sierra Services is one of 8 testing businesses in Calaveras County on CARB's public tester list. 8 of them offer mobile testing and 4 do smoke opacity tests. In Valley Springs itself there are 3 listed businesses, 3 of them mobile. ## When your truck is due 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/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/ ## Frequently asked questions ### Does Sierra Services offer mobile Clean Truck Check testing? Yes. Sierra Services says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call. ### Can Sierra Services test a 2012 or older diesel truck? Sierra Services does not list smoke opacity testing, which older non-OBD diesel trucks need. The nearest listed tester that does is [A&T Mobile Vin Verification](https://ctcfinder.com/tester/a-and-t-mobile-vin-verification-valley-springs/) (about 1 mile). Trucks from 2013 on get an OBD scan instead. ### How much does Sierra Services charge for a Clean Truck Check? Sierra Services has not published prices with us; call (209) 914-0388 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/). ### Is Sierra Services a CARB-credentialed tester? Sierra Services appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS. ## Other testers nearby - **[A&T Mobile Vin Verification](https://ctcfinder.com/tester/a-and-t-mobile-vin-verification-valley-springs/)** — Valley Springs, CA 95252 — (209) 810-2882 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Hunter Moody](https://ctcfinder.com/tester/hunter-moody-valley-springs/)** — Valley Springs, CA 95252 — (209) 217-2691 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Johnson Enterprises](https://ctcfinder.com/tester/johnson-enterprises-san-andreas/)** — 1801 Leonard Ct, San Andreas, CA 95249 — (209) 890-0369 — 12 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Lynchsauto](https://ctcfinder.com/tester/lynchsauto-jackson/)** — 12568 Jackson Gate Rd, Jackson, CA 95642 — (209) 304-0399 — 13 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing. - **[Mobile CARB Testing & Repair](https://ctcfinder.com/tester/mobile-carb-testing-and-repair-jackson/)** — 409 Anita St, Jackson, CA 95642 — (209) 256-4627 — 13 mi. Services: mobile testing, OBD testing, motorhome testing. - **[S&J Auto Service](https://ctcfinder.com/tester/s-and-j-auto-service-jackson/)** — 220 Scottsville Blvd Suite A, Jackson, CA 95642 — (209) 217-8150 — 13 mi. Services: OBD testing, smoke opacity (non-OBD) testing, motorhome testing.