How Long Does It Take To Become a Diesel Mechanic?

A career as a diesel mechanic can be fulfilling if you’ve got a passion for trucks, enjoy hands-on work and want to service engines that power some of the country’s most dynamic vehicles!

If you’re wondering how long it takes to train to become a diesel technician at Universal Technical Institute (UTI), the answer depends on which program you choose and how specialized the training is.¹

But if you’ve got a handy blueprint to becoming a diesel mechanic, you can reach your career goals sooner than later.

So how long does it take to become a diesel mechanic? Read on for more about training opportunities through UTI’s 45-week Diesel Technology program!⁷

Key Summary Points

• Diesel mechanics play a crucial role in maintaining and repairing diesel engines, which power some of the country's most significant vehicles and machinery. Training to become a diesel mechanic can be achieved through programs like the Universal Technical Institute's (UTI) 45-week Diesel Technology program.
• The median annual salary for bus and truck mechanics and diesel engine specialists in the U.S. was $58,970 in May 2023, according to the U.S. Bureau of Labor Statistics (BLS).²⁹ This means half of diesel technicians earned more and half earned less. Keep in mind that salary depends on several factors, including experience, employer, demand and cost of living in the area.
• To enroll in a diesel mechanic training program, you typically need a high school diploma or GED diploma. UTI's Diesel Technology program offers specialized training created with leading manufacturers and provides access to Career Services resources for students and graduates.
• Diesel mechanic training at UTI covers a wide range of topics, including diesel engine service and repair, hydraulic systems, brake systems, manual transmissions, preventative maintenance and more, with hands-on training using the same tools and technology found in the field.¹⁸
• There are more than 24,000 estimated average annual diesel technician job openings in the United States.⁴³ UTI offers Manufacturer-Specific Advanced Training (MSAT) programs for further specialization, and financial aid options are available for those who qualify.    

Responsibilities of a Diesel Mechanic

In the field, diesel mechanics are responsible for diagnosing and repairing diesel engines and vehicles. Many diesel mechanics work in shops, while others might be mobile diesel mechanics, bringing their services directly to customers. Their roles and duties include:

• Talking with clients about the problems they’re having with a diesel vehicle.
• Communicating with clients about their diesel vehicle issues.
• Creating a service strategy.
• Inspecting, repairing and replacing faulty parts.
• Performing diesel maintenance.

Diesel engines power the country’s biggest trucks, large vehicles and machinery, like farm equipment. They’re essential to keeping the country up and running, which is one of the reasons diesel mechanics are so important.

Read: How to Train to Become a Bus Mechanic

How Much Does a Diesel Mechanic Make?

According to the U.S. Bureau of Labor Statistics (BLS), the median annual salary for bus and truck mechanics and diesel engine specialists in the U.S. was $58,970 in May 2023.²⁹

This means half of diesel technicians earned more and half earned less. Keep in mind that the diesel technician salary depends on several factors, including experience, employer, demand and cost of living in the area.

Read: She’s a Full-Time Diesel Technician at Just 19 Years Old

What Are the Educational Diesel Mechanic Requirements?

To become a diesel mechanic, training applicants usually need a high school diploma or GED diploma. Some mechanics choose to learn skills on the job and work their way up, while others enroll in a formal school for diesel mechanic training. Benefits of enrolling in a formal training program like UTI’s Diesel Technology program include:

• Learning skills to become a diesel technician in just 45 weeks⁷.
• Having the opportunity to network with top employers looking to hire diesel techs.
• Completing specialized diesel training programs, which were created with leading manufacturers.
• Accessing UTI’s Career Services resources while you’re in school and after graduation.

Read: What Is a Heavy-Duty Diesel Mechanic?

What Are the Requirements To Attend School for Diesel Mechanic Training?

To apply for the core Diesel Technology program at UTI, the following diesel mechanic admissions requirements must be met:

• Being at least 16 years old at the time of application.
• Submission of at least one of the following documents, which must be accepted by UTI:

○ High school diploma.

○ State-issued GED diploma or state-authorized equivalent exam.

○ Evidence of having attended a Title IV-eligible program at a postsecondary institution under the Ability to Benefit (ATB) provision before July 1, 2012.

○ Successful completion of a degree program at the postsecondary level.

○ Successful completion of an officially recognized home-school program.

Students who are applying from outside of the United States are also required to submit foreign education documents. These documents must be confirmed as valid proof of high school completion.

Read: High Pressure, High Stakes, High Rewards for UTI Avondale Diesel Program Graduate

What To Expect When You Attend a School for Diesel Mechanic Training

What is one of the big differences between a trade school and a traditional college? In a diesel program at a trade school, attendees are surrounded by other students who are passionate about and interested in the same thing they’re studying: diesel engines.    

There are also no general education requirements, which means that you don’t need to take   classes teaching topics you didn’t enroll for, like many traditional colleges require. Instead, you can use your time studying the subjects that actually interest you.

Attending a school for diesel mechanic training gives students hands-on training in state-of-the-industry labs. With diesel mechanic schooling, aspiring techs train on diesel equipment encountered in the real world.

You also get the opportunity to practice and make mistakes so you can learn. UTI instructors have experience working in the diesel industry, so they’ll be able to tell you what graduates can expect in the field.

At some colleges and universities, professors graduate then go right back to school to teach. At UTI, our instructors come directly from the field.

Trade school might feature a mix of instruction, too. Students might view lectures online and then practice those concepts in the lab.

This type of instruction is different from traditional colleges, which might have lectures with hundreds of people in them, with little other option but to listen to a professor. If you’re a hands-on or visual learner, lecture-only classes at traditional colleges can be tough to get through.

Speaking of class sizes, that’s another difference between trade schools and traditional colleges. While traditional colleges might have large classes, trade schools deliberately have small class sizes, allowing students to receive one-on-one attention from instructors and get hands-on learning opportunities.

Another benefit of trade schools is that extracurricular events tend to be focused on what students are interested in, like cars and other vehicles. At UTI, events like car shows and drag races give students a way to bond and have fun outside of the classroom.

Read: What Is a Locomotive Mechanic?

What Can You Do With a Diesel Mechanic Degree or Certificate?

By earning a diesel mechanic degree or diesel mechanic certificate, graduates can use the credential when applying for jobs in the diesel field.

Diesel mechanics consult with customers and strategize repairs. They plan service procedures, inspect vehicle parts, run diagnostic tests and repair broken diesel equipment. These professionals typically use both computers and hand tools to diagnose and repair diesel components.

According to the BLS, the industries that were the largest employers of diesel mechanics in 2023 were:

• Truck transportation
• Local government, excluding schools and hospitals
• Automotive repair and maintenance
• Motor vehicle and motor vehicle parts and supplies merchant wholesalers
• Automotive equipment rental and leasing

Diesel mechanics often work in repair shops, but some work as mobile mechanics and repair vehicles at worksites or on the road. Some diesel mechanics go on to become shop managers or open their own diesel repair businesses.

Read: After 35+ Years in the Industry, Diesel Pro Turns to Teaching.

Diesel Mechanic Course Topics

At UTI, diesel mechanic students take a variety of diesel courses, covering topics that include:

• Automotive climate control systems and repair: types of refrigerants and oils, as well as different systems vehicle manufacturers use.
• Diesel engines service and repair: fundamentals of engine repair and operation.
• Diesel hydraulic systems: fundamentals of hydraulic theory and hydraulic system operation, troubleshooting and repair.
• Diesel truck brake systems and chassis: brake foundation and theory, air-supply system fundamentals, types of brakes.
• Diesel truck manual transmissions: theories and principles of diesel transmissions.
• Diesel truck preventative maintenance: how to perform Department of Transportation inspections based on Federal Motor Carrier Safety Administration guidelines.
• Diesel truck steering and suspension systems: diagnosis and service of power steering pumps, front hub assemblies, steering linkage, wheels and tires, gearboxes, steering columns, rear suspension systems and more.
• Diesel truck transport refrigeration: fundamentals of industrial refrigeration and applications in the trucking industry.
• Vehicle electronic systems and technology: science of electrical principles and electricity and how they’re related to automotive technology.

Each course features hands-on components using industry-aligned tools and technology that technicians encounter in the professional world. Tests and final assessments are provided to help students grasp the curriculum.

Read: What Is a Mobile Diesel Mechanic?

Choosing the Right Diesel Mechanic School

Students who attend UTI's Diesel Technology program can learn the skills they need to succeed in an entry-level position as a diesel mechanic. While enrolled, aspiring techs will learn how to diagnose, repair and replace a variety of diesel engines, using real diesel machinery in lab environments.

After students complete the core diesel training program, they can apply to one of UTI’s  Manufacturer-Specific Advanced Training programs featuring Cummins,⁴⁶Daimler Truck and Peterbilt.¹⁵ These specialized courses go deeper into each brand, teaching students manufacturer-specific topics like engines, fuel systems, brakes and chassis, climate control, hydraulic applications, electronic technology, refrigeration and preventative maintenance.

Read: What Is a Diesel Generator Technician?

Job Outlook for Diesel Mechanics

Skilled diesel technicians are in demand. In fact, the BLS predicts there are more than 24,000 estimated average annual diesel technician job openings in the United States.⁴³ Most of our grads start out working as entry-level technicians or in other entry-level roles. As with any industry, over time and with hard work, you may be able to advance in your career into roles such as:⁷⁷

Entry-level

• Heavy equipment repair technician
• Power generation technician
• Agriculture technician

Advanced

• Mobile diesel mechanic
• Master technician
• Fleet manager
• Shop foreman
• Service manager
• Shop owner

Read: UTI Grad Nestor Martinez: Our World Relies on Diesel Technicians

UTI Campuses That Offer Diesel Mechanic Training

UTI’s diesel mechanic schools are located throughout the country, making it easy for students to find a location close to where they live or where they want to work. Our diesel mechanic school locations are:

• Avondale, Arizona
• Long Beach, California
• Rancho Cucamonga, California
• Sacramento, California
• Miramar, Florida
• Orlando, Florida
• Lisle, Illinois
• Bloomfield, New Jersey
• Exton, Pennsylvania
• Austin, Texas
• Dallas/Fort Worth, Texas
• Houston, Texas

Classes start every three weeks. You can view our diesel school calendar here.

Read: Light-Duty vs. Heavy-Duty Diesel Training: Which Is Right for Me?

Are There Scholarships Available for Diesel Mechanic School?

Yes. Sites like Scholarships.com and Fastweb offer thousands of scholarships for all types of students, including soon-to-be high school graduates, military veterans and minorities. It’s possible to apply for scholarships based on your volunteer work, your unique experiences and interests and how you intend to use your diesel education.

UTI has also compiled a list of scholarships and grants available for students who qualify.¹⁰ To apply for scholarships, read the directions thoroughly.

Gather all required materials and make sure you turn in your application and required documents in time to meet the due date. Get more tips on how to apply for scholarships for diesel mechanic school.

Read: Meet Jazmin Rivera: UTI Grad, Diesel Technician and Business Owner

Becoming a Diesel Mechanic FAQs

1. How long is diesel mechanic school?

A typical diesel mechanic training program to complete. The duration varies based on the depth of the curriculum and the individual student's learning pace. At Universal Technical Institute, diesel technology training takes just 45 weeks! ⁷

2. Are there any specialized diesel mechanic education programs?

Yes, some trade schools and community colleges offer specialized diesel mechanic training programs. At UTI, these programs include the Cummins Engines, Cummins Power Generation,⁴⁶ Daimler Truck North America (DTNA) Finish First and Peterbilt Technician Institute¹⁵ training programs!

3. Are there any prerequisites or requirements for obtaining a diesel mechanic education?

Most diesel mechanic schools require a high school diploma or GED diploma to sign up. Some may also require a basic understanding of diesel mechanics. At UTI, experienced instructors will teach students from the ground up, even if they have neither prior knowledge of nor experience with the industry’s technologies.

4. Can I become a certified diesel mechanic without attending a formal school?

While it's possible to become a diesel mechanic through on-the-job training, getting a job without a formal diesel mechanic education can be difficult. Completing UTI’s diesel training counts toward eligibility for ASE certification testing.

5. Are there any financial aid options available for diesel mechanic schooling?

Yes! For those interested in diesel mechanic schooling at UTI, there are several financial aid options available to those who qualify. These options include federal student loans, scholarships and grants.¹⁰

Our Career Services advisors may also help students pursue part-time work-study options while enrolled. Part-time work opportunities may also be available through the Early Employment Program, which helps connect potential employers with eligible students so they can find industry work while taking courses.³⁶

Get a Diesel Mechanic Education in Less Than a Year!⁷

Diesel mechanics are in high demand, and employers are looking for trained technicians who can service the industry's latest systems. Help meet the demand by learning techniques used by today’s diesel pros!

If you’d like to learn more about attending a trade school for a diesel mechanic education, contact UTI online or by calling us at 1-800-834-7308. Our Admissions Representatives can answer any questions you might have and help you learn more by providing more information about our program.