Pursue a Career in Diesel Mechanics & Heavy Truck Maintenance

The online Diesel Mechanics & Heavy Truck Maintenance program covers basic diesel engine operations, troubleshooting and repair and more. The program helps you to prepare for the National Institute for Automotive Service Excellence (ASE) Certification Medium-Heavy Truck Tests. You can complete this program in as little as seven months, training online — at home or on the go — at a pace that’s right for you.

Prepare to Take the ASE Certification Exam

Penn Foster College's Diesel Mechanics & Heavy Truck Maintenance program's up-to-date content helps you to prepare for the National Institute for Automotive Service Excellence (ASE) Certification Medium-Heavy Truck Test. The ASE certification is a respected industry certification that can strengthen students' resumes as they explore career opportunities.
Automotive Service Excellence Certification
Heavy Truck/Diesel Mechanic

Why Become a Diesel Mechanic?

Diesel mechanics work on engine operations and computerized management systems for trucks and other diesel vehicles. There are a lot of opportunities for diesel mechanics, including automobile, truck, and bus servicing, industrial or government fleet servicing, manufacturers, and repair shops or service stations, or even starting your own business. This program is beneficial to students with no previous diesel mechanic experience or students who have previous jobs in the industry. According to the U.S. Bureau of Labor Statistics’ Occupational Outlook Handbook, the average annual diesel mechanic salary was $48,500 in 2019.¹
Why Choose Penn Foster College?
Start and Study When You Want
Learn at home or on the go through our custom-designed, mobile-friendly student portal, available 24/7.
Dedicated Success Coaches
A Committed Support System
While you can study at home, you're not alone! Our dedicated Student Services Department, Student Community, and instructors are just a call or email away.
Curriculum for Success
Curriculum for Success
Get the skills and knowledge you need to help you prepare for a job in the Diesel Mechanics/Heavy Truck Maintenance field.​
Self paced
Set Your Goals and Pace
Customize your study and exam schedule with progress-tracking and goal-setting tools that keep you moving forward.​
Proven Reputation
With 58,000 + graduates in 2019 from our accredited high school, career school, and college, you're in good hands!
Connect with Other Students
Connect in real-time with other Diesel Mechanics/Heavy Truck Maintenance students as part of the Penn Foster Community.
Student Experience

A Customized Learning Experience

With mobile-friendly coursework, progress-tracking and goal-setting tools, virtual simulations, and informative videos to help you succeed, the Penn Foster Experience (PFx) is online learning like no other.

Diesel Mechanics Course Details

The Penn Foster Diesel Mechanics Career Diploma program is designed to help students learn how to become a diesel mechanic and prepare to sit for the Medium/Heavy Duty Trucks ASE certification exam upon completion of the program. The course outline includes lessons on repairing diesel engines, brake systems, shop safety practices, and more.
Penn Foster Curriculum
Snap-on Student Excellence Program

Snap-on Student Excellence Program

Students enrolled in the Diesel Mechanics/Heavy Truck Maintenance training program are eligible to participate in the Snap-on Student Excellence Program. This program allows students in trades and technology education programs to purchase high-quality Snap-on tools at a preferred student discount.

Important State Requirements: Be sure to check here for the requirements in your state.

Diesel Mechanic Tuition

With flexible, affordable payment options, you can get started on your Diesel Mechanics/Heavy Truck Maintenance training online today.
Penn Foster gave me a well rounded understanding of my duties, even some that I haven't performed yet.
Bruce M.
Diesel Mechanics/Heavy Truck Maintenance Graduate
Diesel Mechanics Student


Q. What are the duties of a diesel mechanic?

A. Diesel mechanics inspect, repair, or overhaul large vehicles like buses and trucks, and maintain and repair any type of diesel engine. Most will consult with customers about repairs, examine critical parts, and discuss basic care and maintenance of diesel vehicles.

Q. How do I become a diesel mechanic?

A. Becoming a diesel mechanic can require academic and hands-on training, through a skilled trades-focused school or apprenticeship program. Certification from the National Institute for Automotive Service Excellence (ASE) is also standard for those working in the field.

Q. How long does it take to become a diesel mechanic?

A. With Penn Foster’s online diesel mechanic classes, you can take the next steps toward working in the field in as little as 7 months. You can learn more by reading the diesel mechanic course outline.

Q. How much do diesel mechanics make?

A. Depending on the area you live in, your experience, and the company you work for, the salary for diesel mechanics can vary. However, the average national salary for entry-level jobs in the field is $48,500 per year or $23.32 per hour.¹

Q. What are some must-have diesel mechanic tools?

A. While many shops will have tools available, some must-have items diesel mechanics should always have on them include things like measuring tapes, drive sockets, screwdrivers, plyers, screwdrivers, wrenches, and multimeters.

Q. How Much Does a Diesel Mechanic course cost on average?

A. On average, a diesel mechanic training course can cost anywhere from $1,000 to $5,000² for a certificate program. With Penn Foster's affordable tuition, you can pay as little as $49 per month toward the total tuition of $829.³

Ready To Enroll?

Get started today on your path towards a career as a Diesel Mechanic with Penn Foster College’s accredited, online program.

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Hundreds of leading employers and workforce organizations partner with Penn Foster to attract, develop, and retain talent for today’s in-demand middle skilled occupations.

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¹ Bureau of Labor Statistics, U.S. Department of Labor, Occupational Outlook Handbook, Diesel Service Technicians and Mechanics, on the Internet here (visited June 15, 2020). Statements found in the United States Department of Labor Occupational Outlook Handbook are not a guarantee of any post-graduation salary, in part because the data used to create the Occupational Outlook Handbook includes workers from differing educational backgrounds, levels of experience, and geographic areas of the country.

² https://www.vocationaltraininghq.com/cost/diesel-mechanic-school/

³ Total tuition cost based on an automatic payment plan.