How Much Does a Semi Truck Mechanic Make?

Working on large diesel trucks requires a specialized set of skills. Semi-truck mechanics keep these enormous vehicles running safely and efficiently. Their work is challenging but critical for transporting goods across the country. So how much does a semi-truck mechanic make for this important job? Here’s a detailed overview of semi-truck mechanic salaries, job duties, and career outlook.

Semi Truck Mechanic Job Duties

Semi-truck mechanics are responsible for inspecting, diagnosing, repairing and maintaining semi-trucks, also known as 18-wheelers or big rigs. Their core duties include:

  • Checking engines, transmissions, brakes and other components for problems
  • Using diagnostic equipment to find issues
  • Replacing defective parts like alternators, starters, hoses, and belts
  • Performing preventative maintenance like oil changes, tire rotations and wheel alignments
  • Testing and adjusting components after repairs
  • Completing documentation for repair orders and parts purchases
  • Building rapport with semi-truck drivers to understand repair needs

It’s a hands-on role that requires technical expertise, critical thinking and customer service skills. Mechanics often specialize in specific makes of trucks or types of repairs so keep this thing in mind when someone suggest you about semi truck mechanic near me. For example, some may focus on engines, others on electrical systems, etc. They work in repair shops ranging from small independent garages to extensive fleet maintenance facilities. It’s common for semi truck mechanics to work evenings, weekends and holidays since truck downtime equals lost revenue for fleet owners.

Education and Training Requirements

Becoming a B & S Truck Repair semi-truck mechanic requires formal education and on-the-job training. Many employers want candidates with an associate’s degree or certificate in diesel technology. Standard programs cover topics like:

  • Diesel engines, transmissions and drive trains
  • Brakes, steering and suspension
  • Electrical systems
  • Preventative maintenance
  • HVAC for truck cabs

In addition to general diesel courses, some community colleges and trade schools offer specialized classes on semi-truck repair. Students get hands-on practice in school labs on engines and equipment.

Besides education, mechanics need experience working under more senior technicians to hone their skills. Entry-level positions like shop assistants and lubrication workers provide this opportunity. On-the-job training teaches the nuances of diagnosing and fixing complex issues. Certification through the National Institute for Automotive Service Excellence demonstrates a mechanic’s competency.

Average Salary for Semi Truck Mechanics

How much does the average diesel truck mechanic near me make? According to the Bureau of Labor Statistics, the median annual wage for bus, truck and diesel engine mechanics was $50,020 in 2021. The lowest 10% earned $30,880, and the highest 10% earned $76,270.

Salaries can vary substantially based on factors like:

  • Experience level – Entry-level mechanics may start around $35,000 per year, while veterans with 5+ years on the job can make over $70,000.
  • Certifications – ASE-certified technicians generally earn higher pay than non-certified. Master certification brings the highest salaries.
  • Employer – Working for a significant fleet or truck dealership usually means higher wages than a local repair shop.
  • State/city – There are regional differences in average pay. Mechanics in states like Alaska and Hawaii generally earn more.
  • OT and commissions – Many mechanics get overtime pay and may earn commissions for upsells on repairs. This can significantly increase yearly earnings.

It’s possible to reach six figures as a master technician with years of experience, top certifications and specialty skills. For example, those who can work on natural gas-powered semi trucks tend to be higher paid.

Job Outlook for Semi Truck Mechanics

The job outlook for semi truck mechanics in B & S Truck Repair is solid. The BLS projects 4% growth from 2020 to 2030 for diesel technicians, which is faster than average. More mechanics will be needed to handle rising freight trucking activity and replace retiring workers. There are already shortages in some regions.

Despite economic downturns, the need for transporting supplies, raw materials and consumer goods keeps trucking essential. Semi-trucks supply supermarkets, farms, healthcare facilities, factories and many other industries. More advanced vehicle technology should lead to demand for mechanics with the latest diagnostic and repair skills.

Opportunities may be most abundant with fleet maintenance companies, truck dealerships and independent shops near significant highways and logistics hubs. Mechanics willing to relocate often have the best job prospects and the highest earning potential.

Steps to Becoming a Semi Truck Mechanic

For those interested in this career, here are the main steps to becoming a semi-truck mechanic:

Get Formal Training

Enroll in a diesel technology program at a community college or trade school. Many offer flexible schedules with night and weekend classes. Look for an accredited school that offers hands-on learning in modern facilities. Recommended areas of study include:

  • Diesel engines
  • Drive trains
  • Brake systems
  • Vehicle electrical
  • Preventative maintenance
  • HVAC

Earning an associate’s degree or certificate shows employers that you have essential knowledge and training.

Gain Hands-On Experience

Look for apprenticeship opportunities and entry-level repair jobs at dealerships, fleet companies and repair shops. While the pay may start low, it provides real-world experience with seasoned professionals. Expect duties like assisting technicians, lubricating parts, changing fluids and tires, and cleaning shop areas.

Consider Specialty Training

Some experienced mechanics get extra training on specific truck makes like Peterbilt, Volvo and Freightliner or systems like transmissions and natural gas engines. This specialty knowledge can increase your future job options and earnings.

Obtain ASE Certification

Get certified in various areas like brake repair, suspension, and electrical systems through ASE tests. Certification demonstrates your competence and professionalism to employers. Continue taking tests to reach Master Technician status for the highest recognition.

Continue Your Education

The technology in semi trucks keeps advancing, so mechanics need to stay up-to-date. Enroll in manufacturer training courses as they are released. Read industry magazines and websites to learn about the latest diagnostic tools and repair techniques. Staying current ensures your skills remain in demand.

Pros and Cons of Being a Semi Truck Mechanic


  • Strong job demand and good salaries/earnings potential, especially for experienced mechanics
  • Opportunities across the country
  • Hands-on work and a variety of repairs each day
  • Gratifying to keep essential vehicles in safe operating condition
  • Can progress from apprentice to journeyman to master technician


  • Fast-paced environment with pressure to minimize truck downtime
  • Need to stand and lift heavy parts much of the shift
  • May have to work overtime, weekends and holidays
  • Injuries are common due to the physical nature of the work
  • Keeping up with constantly changing technology can be challenging

Top Skills Needed to be a Great Mechanic

In addition to technical aptitude, there are several critical soft skills needed to about semi truck mechanic shop near me:

  • Troubleshooting Ability

Quickly diagnosing hard-to-find problems requires logic and critical analysis. Mechanics must interpret sensor data, customer complaints, and observations to zero in on faulty components.

  • Communication Skills

Building trust with customers requires clear communication about repair options and recommendations. Explaining technical details in an easy-to-understand way is valuable.

  • Collaborative Spirit

Cooperating with other technicians to solve tricky issues or complete big projects is essential in a busy shop environment. Being a team player improves productivity.

  • Adaptability

The ability to adapt to changing technologies through ongoing training is essential. Advanced vehicle electronics require an openness to learn new systems and repair techniques.

  • Time Management

Effectively prioritizing urgent repairs and managing workload is crucial to maximizing truck uptime for customers. The job requires discipline to use time wisely.

  • Problem Solving

When repairs hit unexpected snags, mechanics need perseverance and creativity to overcome challenges. Pursuing solutions from many angles is invaluable.

Semi Truck Mechanic Certifications

Various certifications show a mechanic’s expertise in different aspects of semi-truck repair:

ASE Certifications

The National Institute for Automotive Service Excellence (ASE) conducts certification tests for diesel mechanics. Some of the most relevant certifications include:

  • Truck Equipment – for repairing truck bodies, trailers, and electrical systems
  • Diesel Engines – for knowledge of diesel technology principles, troubleshooting, and repairs
  • Drive Train – for expertise in clutch, transmission, axles and drivetrain components
  • Brakes – for inspecting, troubleshooting, and servicing brake systems
  • Suspension & Steering – for repairs to steering and suspension parts like ball joints, steering gears, and wheel alignments

Earning ASE Master Technician status requires passing tests in all areas. This demonstrates comprehensive knowledge to employers. Those can take ASE tests with at least two years of experience.

Advanced Diesel Certifications

Several industry groups offer certifications for mastering the latest diesel technologies:

  • IMT – Providing classes and certs on natural gas and renewable fuel vehicles
  • NTTS – Classes on working with electronic diesel controls and diagnostic tools
  • CDX Global – Online training and certs for hybrid/electric drivetrains

These demonstrate specialized expertise for higher-paying jobs.

Project Management Certifications

Some experienced mechanics pursue certifications like Certified Associate in Project Management (CAPM) to qualify for shop supervisor or service management roles. Knowledge of workflow planning, scheduling, and coordination helps oversee teams.


Being a semi-truck mechanic in B & S Truck Repair is a challenging but rewarding career fixing big rigs traveling America’s highways. Although the work is hard, average salaries are relatively high compared to other trades. With solid job growth expected, qualified mechanics should continue finding favorable employment opportunities. Those willing to continuously build expertise in the latest truck technologies will enjoy the best prospects.

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