How to Become a Diesel Mechanic in California (2026)
California employs about 20,940 diesel mechanics earning a median $73,950 a year (BLS OEWS, May 2025). Training as a Diesel Mechanic here means completing a postsecondary automotive, diesel, motorcycle, marine, or collision program plus ASE or OEM credentials. This is not a default RAPIDS apprenticeship.
California employs approximately 20,940 diesel mechanics according to the Bureau of Labor Statistics, with a median annual wage of $73,950 1. Nationally, diesel mechanic employment is projected to grow 2.4% from 2024 to 2034, with about 26,500 openings per year 2. This page covers how to become a Diesel Mechanic in California, including licensing requirements, training programs, and salary data.
At a Glance
- Training paths: trade-school or community-college program in the specialty (find programs)
- Typical timeline: a postsecondary automotive, diesel, motorcycle, marine, or collision program plus ASE or OEM credentials. This is not a default RAPIDS apprenticeship
- Exam: ASE or OEM certification
- Median wage (California): $73,950 per year 1
Quick Answers About How to Become a Diesel Mechanic in California
How to become a Diesel Mechanic in California? Complete a postsecondary automotive, diesel, motorcycle, marine, or collision program plus ASE or OEM credentials. This is not a default RAPIDS apprenticeship. Confirm credential rules with the program and employer.
How long does it take? Most people finish a postsecondary automotive, diesel, motorcycle, marine, or collision program plus ASE or OEM credentials. This is not a default RAPIDS apprenticeship. Confirm current hour totals with the program and employer.
Do I need a license in California? Most states do not require a statewide occupational license. Employers typically expect ASE or OEM certification. See the licensing section below.
What do diesel mechanics earn in California? The median annual wage for diesel mechanics in California is $73,950 according to BLS data. Entry-level wages start around $47,180 and experienced professionals can earn $96,730 or more 1.
How to Become a Diesel Mechanic in California
- Meet program entry rules. Programs typically require a high school diploma or GED.
- Complete a specialty program. Finish an automotive, diesel, motorcycle, marine, or collision program. Some union shops use apprenticeships; the default national path is a certificate plus ASE, not DAS as the only option.
- Earn ASE or OEM credentials. Pass ASE tests or OEM training the employer requires. Some states add a separate smog or emissions credential; it is not the whole mechanic license.
Steps and hour totals vary by credential level; confirm current requirements with the program and employer before you enroll.
Diesel Mechanic License Requirements in California
Most states do not license auto, diesel, motorcycle, marine, or collision techs as a statewide journeyman card. Employers expect ASE or OEM credentials. Some states add a smog or emissions credential.
Typical path
Complete a specialty program.
Earn ASE or OEM credentials.
Add a state smog or emissions credential only if that state and the job require one.
Hour totals, fees, and reciprocity rules change. Confirm current requirements with the employer before you enroll.
Diesel Mechanic Apprenticeship Information in California
Apprenticeships combine paid on-the-job training with classroom instruction and typically last 3 to 5 years. California’s apprenticeship program is administered by the California Division of Apprenticeship Standards - Registered Apprenticeship 3.
Contact Information:
- Office: California Division of Apprenticeship Standards - Fresno Region
- Phone: (559) 445-5431
- Email: [email protected]
Diesel Mechanic Wages by Metro Area in California
Bus and Truck Mechanics and Diesel Engine Specialists Wages by Metro Area in California
According to the Bureau of Labor Statistics ( OES data), bus and truck mechanics and diesel engine specialists wages in California vary by metro area.
| Metro Area | Employment | Median Annual Wage | Avg. Annual Wage | Entry Level (10th pctile) | Experienced (90th pctile) |
|---|---|---|---|---|---|
| Los Angeles-Long Beach-Anaheim | 6,520 | $77,380 | $74,620 | $48,550 | $95,760 |
| Riverside-San Bernardino-Ontario | 3,400 | $71,300 | $68,590 | $46,890 | $89,570 |
| San Francisco-Oakland-Fremont | 1,730 | $82,100 | $81,180 | $48,900 | $105,550 |
| San Diego-Chula Vista-Carlsbad | 1,430 | $75,070 | $74,200 | $51,370 | $95,520 |
| Sacramento-Roseville-Folsom | 1,190 | $72,660 | $72,520 | $48,710 | $94,410 |
| Bakersfield-Delano | 860 | $63,520 | $64,010 | $39,120 | $85,870 |
| Stockton-Lodi | 760 | $70,410 | $68,590 | $46,990 | $90,170 |
| Fresno | 720 | $65,210 | $67,200 | $44,510 | $96,210 |
| San Jose-Sunnyvale-Santa Clara | 720 | $88,980 | $85,960 | $56,550 | $113,440 |
| Modesto | 420 | $76,640 | $74,740 | $47,740 | $97,980 |
| Oxnard-Thousand Oaks-Ventura | 350 | $74,730 | $72,340 | $51,440 | $97,160 |
| Santa Rosa-Petaluma | 240 | $68,410 | $72,480 | $48,220 | $99,700 |
| Visalia | 240 | $66,610 | $65,330 | $44,210 | $82,090 |
| Santa Maria-Santa Barbara | 210 | $70,060 | $67,520 | $38,360 | $93,040 |
| Salinas | 200 | $63,840 | $65,720 | $38,730 | $93,770 |
| Vallejo | 200 | $75,500 | $75,080 | $49,490 | $100,300 |
| El Centro | 140 | $70,360 | $66,580 | $36,480 | $97,650 |
| Merced | 120 | $62,970 | $68,770 | $45,930 | $89,880 |
| San Luis Obispo-Paso Robles | 120 | $74,620 | $72,260 | $47,090 | $91,320 |
| Hanford-Corcoran | 110 | $60,940 | $61,200 | $35,620 | $91,000 |
| Chico | 100 | $55,770 | $60,450 | $45,790 | $87,220 |
| Redding | 100 | $65,710 | $66,980 | $36,220 | $90,890 |
| Yuba City | 100 | $62,080 | $63,160 | $45,860 | $81,310 |
| Santa Cruz-Watsonville | 90 | $75,670 | $76,790 | $56,510 | $99,330 |
| Napa | 60 | $78,070 | $79,120 | $51,160 | $103,950 |
Wages reflect survey data and vary based on experience, credentials, employer, and local market conditions. Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May .
Frequently Asked Questions
What is the job outlook for diesel mechanics in California? California currently employs approximately 20,940 diesel mechanics 1. Nationally, diesel mechanic employment is projected to grow 2.4% from 2024 to 2034 2.
What training programs are available in California? Options include trade schools, community colleges, and apprenticeship programs. Use the school finder above to search for programs in California. You can also contact the California Division of Apprenticeship Standards - Registered Apprenticeship for apprenticeship opportunities.
How much do diesel mechanics earn in California compared to the national average? The median annual wage for diesel mechanics in California is $73,950, which is $13,310 above the national median of $60,640 according to BLS data 1.
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Citations
About this guide: Researched and written by the TradeCareerPath Editorial Team. Our editorial team researches and sources every trade school and career guide using federal labor and education data, including BLS OEWS and Employment Projections, DOL apprenticeship records, IPEDS, College Scorecard, and state licensing boards. We follow the editorial standards documented at /editorial-policy/.
References
Bureau of Labor Statistics - Occupational Employment and Wage Statistics: https://www.bls.gov/oes/ ↩︎ ↩︎ ↩︎ ↩︎ ↩︎
Bureau of Labor Statistics - Employment Projections: https://www.bls.gov/emp/ ↩︎ ↩︎
California Division of Apprenticeship Standards - Registered Apprenticeship: https://www.dir.ca.gov/databases/das/aigstart.asp ↩︎
Data sources
Figures on this page are sourced from the federal and state datasets below. Methodology: how we rank and source data.
| Data | Provider | Vintage |
|---|---|---|
| Occupational Employment and Wage Statistics (OEWS) | U.S. Bureau of Labor Statistics | May 2025 |
| Employment Projections | U.S. Bureau of Labor Statistics | 2024-2034 |
| Integrated Postsecondary Education Data System | National Center for Education Statistics (IPEDS) | 2024 |
| College Scorecard (school-level outcomes) | U.S. Department of Education | latest release |
| College Scorecard (field-of-study earnings) | U.S. Department of Education | latest release (updated 2026-06-12) |
| Occupational licensing requirements | CareerOneStop (U.S. Department of Labor) | latest release (updated 2026-02-22) |
| Registered apprenticeship programs | CareerOneStop / Apprenticeship.gov (U.S. Department of Labor) | latest release (updated 2025-10-25) |
| O*NET occupation profiles (skills, tasks, tools, job zones) | U.S. Department of Labor (O*NET / Employment & Training Admin.) | O*NET 29.1 (updated 2026-06-13) |