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Clean Truck Check Preferred Credentialed Testers List

Welcome to CTA's Clean Truck Check (CTC) Preferred Credentialed Testers List!

Please find below a list of reputable CTA members who offer CTC testing throughout the state.

The list is sorted from A-Z by Company Name.

Advanced Emission Control Solutions

Main service address: 2695 S. Fourth Street, Fresno, CA 93725

Phone number: (559) 579-1450

Mobile testing offered: Anywhere in California (depending on the amount of trucks)

Type(s) of testing service(s): SAEJ1979, SAEJ1939, & Vehicle model year 2013 and older (smoke opacity and visual inspection)

Testing price: $190.95 per vehicle, discounts apply on amount of vehicles (consulting services for testing also available upon request)


Affinity Truck Center

Main service address: 2707 S. East Ave., Fresno, CA 93725

Phone number: (559) 266-9531

Mobile testing offered: Fresno, Madera, Sanger, Clovis, Reedley, Visalia, Selma, Kingsburg, Firebaugh, & Bakersfield

Type(s) of testing service(s): SAEJ1979, SAEJ1939

Testing price: $72.04


Betts Truck Parts & Service

Main service address: 2867 South Maple Ave.

Phone number: (916) 928-3818 (Sacramento area) | (559) 498-8624 (Fresno area)

Mobile testing offered: Central California

Type(s) of testing service(s): SAEJ1939

Testing price: $125 + mobile fee if needed


Central Valley Trailer Repair, Inc.

Main service address: 2974 S. East Ave., Fresno, CA 93725

Phone number: N/A

Mobile testing offered: Central Valley

Type(s) of testing service(s): SAEJ1979, SAEJ1939

Testing price: $70


Diesel Master, Inc.

Main service address: 10830 South Harlan Road, French Camp, CA 95231

Phone number: (209) 234-7406

Mobile testing offered: Tracy, Stockton, Manteca, Lathrop

Type(s) of testing service(s): SAEJ1979, SAEJ1939, & vehicle model year 2013 and older (smoke opacity and visual inspection)

Testing price: $135 per unit, plus mobile fees if applicable


IRP Inc.

Main service address: 10010 Redwood Ave., Fontana, CA 92335

Phone number: (909) 428-2002

Mobile testing offered: Will travel anywhere, charge for travel

Type(s) of testing service(s): SAEJ1979 & SAEJ1939

Testing price: $50 per test, plus mobile fees if applicable


Titan Tank Lines

Main service address: 2525 Malaga Ave., Fresno, CA 93725

Phone number: (559) 669-3796

Mobile testing offered: Within 100-mile radius of main address

Type(s) of testing service(s): SAEJ1979, SAEJ1939

Testing price: $125

If you are a CTA member and would like your company to be listed as one of CTA's Preferred Credentialed Testers, please complete the Preferred Credentialed Tester survey here:

For any other questions, please contact Hayden Tallman at htallman@caltrux.org.

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