Diesel Mechanic Career Guide in Illinois
Explore diesel mechanic salary, licensing requirements, training pathways, apprenticeships, job outlook, and career opportunities in Illinois.
Career Guide Navigation
How to Become a Diesel Mechanic in Illinois
Diesel mechanics in Illinois commonly enter the occupation with a high school diploma and develop competency through long-term supervised on-the-job training. Employers may prefer candidates who have completed a diesel technology certificate, associate degree, manufacturer-sponsored program, or registered apprenticeship.
Training commonly covers diesel engines, fuel and electronic control systems, electrical diagnostics, air brakes, steering and suspension, transmissions, preventive maintenance, emissions and aftertreatment systems, hydraulic systems, and workplace safety. Industry certification may be required by an employer. Additional federal or state qualifications apply when a technician performs regulated commercial vehicle inspections, brake inspections, emissions testing, refrigerant service, or driving duties.
Diesel mechanics in Illinois typically enter the field through vocational schools, community colleges, or union apprenticeship programs. Training includes diesel engine systems, hydraulic systems, electrical diagnostics, emissions systems, and computerized diagnostics. Due to Illinois’ strong manufacturing and logistics industries, industrial maintenance training is highly emphasized.
Note: Training pathways vary by employer, program sponsor, and licensing category. Classroom education may provide useful technical preparation, but it does not automatically replace supervised work experience unless the applicable licensing authority specifically allows that credit.
Diesel Mechanic Salary in Illinois
The salary figure shown on this page represents the Illinois median wage for diesel mechanic workers, based on U.S. Bureau of Labor Statistics occupational wage data. A median wage is the point at which half of workers earn more and half earn less. It is not a guaranteed starting salary.
Actual earnings may vary by experience, license level, metropolitan area, employer, industry, overtime, and union agreement.
Compared with the national median of $60,640, the median wage in Illinois is approximately $2,110 higher. This comparison does not account for differences in cost of living.
Licensing Authority for Diesel Mechanics in Illinois
Note: Licensing rules, fees, examinations, exemptions, and renewal requirements may change. Applicants should verify current requirements directly with the authority listed above before beginning work, applying for an examination, or enrolling in a training program.
CAREER PREPARATIONDiesel Mechanic Training Requirements in Illinois
Illinois diesel mechanics commonly prepare through a community college, technical school, apprenticeship, manufacturer program, military training, or supervised employment. No single state training pathway applies to all diesel mechanic positions.
Technicians performing regulated annual commercial vehicle inspections or brake work must meet the applicable federal knowledge, training, and experience requirements. A CDL is required only when assigned driving duties involve operation of a vehicle that legally requires one.
Diesel Engine Diagnostics
Training includes advanced diagnostics of diesel engines using electronic systems and mechanical inspection tools.
Hydraulic Systems
Technicians learn to maintain hydraulic systems used in heavy equipment and industrial machinery.
Electrical Systems
Modern diesel engines require advanced ECU and electrical troubleshooting skills.
Emissions Systems
Training includes emissions system maintenance to meet federal and state environmental standards.
Diesel Mechanic Training Providers in Illinois
| Provider | City | Program Website |
|---|---|---|
| College of DuPage | Glen Ellyn | View Program |
| Joliet Junior College | Joliet | View Program |
| Southern Illinois University | Carbondale | View Program |
| Lincoln Tech | Melrose Park | View Program |
| Illinois Central College | East Peoria | View Program |
Note: Program availability, admission requirements, tuition, and credit toward licensing requirements may change. Verify current details directly with the provider and the applicable state licensing authority before enrolling. Listings are informational and do not constitute rankings or endorsements.
PAID TRAINING OPPORTUNITIESDiesel Mechanic Apprenticeship Programs in Illinois
Diesel Mechanic Licensing Requirements in Illinois
Illinois does not require a statewide diesel mechanic license. However, ASE certification is widely required by employers in trucking fleets, manufacturing companies, and dealership service centers. EPA Section 609 certification is required for HVAC-equipped vehicle systems. Union membership and apprenticeship completion are highly valued in Chicago and industrial regions.
Illinois does not require a general individual occupational license for diesel mechanics. Employers may establish education, experience, ASE certification, manufacturer-training, and commercial driving requirements.
Illinois passenger-vehicle emissions testing requirements should not be presented as a statewide diesel mechanic license. Federal qualifications apply when a technician performs regulated commercial vehicle annual inspections or is responsible for brake inspection, maintenance, service, or repair.
EMPLOYMENT PROJECTIONSDiesel Mechanic Job Outlook in Illinois
Illinois has strong demand for diesel mechanics driven by logistics hubs, manufacturing plants, rail freight systems, and construction activity. Chicago serves as one of the largest transportation and distribution hubs in the United States, ensuring stable long-term employment.
Illinois projects employment for bus and truck mechanics and diesel engine specialists to grow by approximately 3% from 2022 to 2032, with about 870 openings per year. Projections include both new positions and openings created when workers leave the occupation.
Note: State employment projections may use a different base period from national BLS projections. Projected growth is an estimate rather than a guarantee of employment, and local demand may vary by metropolitan area, industry, construction activity, and employer investment.
CAREER QUESTIONSFrequently Asked Questions
What is the diesel mechanic salary in Illinois?
The statewide median wage for diesel mechanics in Illinois is approximately $62,750 per year, or $30.17 per hour, based on May 2024 occupational wage data. Actual earnings vary by experience, license level, location, employer, overtime, and industry.
Does Illinois require diesel mechanic licensing?
No statewide occupational license is generally required for diesel mechanic workers in Illinois. Local jurisdictions, employers, or specific work scopes may still impose requirements, so applicants should verify current rules before beginning work.
How long does it take to become a diesel mechanic in Illinois?
The time required depends on the license pathway and training program. A typical training pathway takes approximately 1–2 Years, although licensing, apprenticeship, and employer requirements may differ.
Are diesel mechanics in demand in Illinois?
Illinois projects diesel mechanic employment to grow by approximately 3% from 2022 to 2032, with about 870 openings per year. Projections include both new positions and openings created when workers leave the occupation.
Career Data Sources
State wage, employment outlook, and licensing information is reviewed using government and official regulatory sources. Data and requirements may change after publication.
- May 2024 State Occupational Employment and Wage Estimates — U.S. Bureau of Labor Statistics. May 2024 State OEWS
- Illinois Wages for Diesel Mechanic (SOC 49-3031) — O*NET OnLine, U.S. Department of Labor. Illinois Diesel Mechanic Wages
- Illinois Diesel Mechanic Employment Trends — O*NET OnLine, U.S. Department of Labor. Illinois Diesel Mechanic Employment Trends
- Federal Motor Carrier Safety Administration (FMCSA) — Licensing authority. Federal Motor Carrier Safety Administration (FMCSA)