Bus and Truck Mechanics and Diesel Engine Specialists

AI & job outlook

What today's research says about this occupation's exposure to AI, how AI is actually being used in it, and where employment is headed. These are positions within published studies — measures of exposure and usage, not predictions that this job will disappear.

Exposure to current AI

Each study uses its own scale, so the raw scores are not comparable across rows — the percentile (this job's rank among all U.S. occupations with data) is the comparable figure, and sizes the bars.

OpenAI's exposure study scores tasks three ways: with a language model alone (α 0.0), with simple added tooling (β 0.0), and including AI-powered software (γ 0.0). Higher means more of the job's tasks could be done at least twice as fast — not that they will be automated away.

This job mostly cannot be done remotely (Dingel–Neiman) — its hands-on tasks sit outside what software-based AI reaches.

How AI is actually used in this job

Among measured AI assistant conversations mapped to this occupation (Anthropic Economic Index, 2026-01-15), these task types came up most. These are shares of observed AI conversations — not shares of the job, of worker time, or of what could be automated.

Job outlook

Independent U.S. Bureau of Labor Statistics employment projection for 2024–2034 — a labor-market forecast, not an AI-impact forecast.

“Annual openings” counts new jobs plus replacements for workers who leave the occupation, so it can be large even when growth is modest.

Where this work sits on the global GenAI gradient

The ILO's 2025 global study scores generative-AI exposure on the international ISCO-08 occupation system, not US SOC. Bridged through the published (and approximate, many-to-many) IBS O*NET-SOC ↔ ISCO-08 crosswalk, this US occupation corresponds to the international occupation below. Exposure here means how much of the work's tasks today's AI can attempt — task overlap, not automation, adoption, or jobs lost.

Read the whole six-band gradient on the GenAI exposure gradient page. The crosswalk is approximate: a US occupation can map to several international ones, and the ILO scores describe the international occupation, not this exact US role.

Tasks

All 26 tasks O*NET lists for this occupation, ordered by importance. Each links to its own page with AI-exposure and observed-use detail.

• Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists. Core · importance 4.5
• Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition. Core · importance 4.3
• Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists. Core · importance 4.2
• Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment. Core · importance 4.2
• Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions. Core · importance 4.2
• Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery. Core · importance 4.2
• Examine and adjust protective guards, loose bolts, and specified safety devices. Core · importance 4.1
• Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges. Core · importance 4.1
• Rewire ignition systems, lights, and instrument panels. Core · importance 4.0
• Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly. Core · importance 4.0
• Diagnose and repair vehicle heating and cooling systems. Core · importance 4.0
• Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors. Core · importance 4.0
• Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications. Core · importance 4.0
• Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units. Core · importance 3.9
• Adjust or repair computer controlled exhaust emissions devices. Core · importance 3.9
• Rebuild gas or diesel engines. Core · importance 3.9
• Specialize in repairing and maintaining parts of the engine, such as fuel injection systems. Core · importance 3.9
• Measure vehicle emissions to determine whether they are within acceptable limits. Supplemental · importance 3.9
• Follow green operational practices involving conservation of water or energy or reduction of solid waste. Supplemental · importance 3.8
• Recondition and replace parts, pistons, bearings, gears, and valves. Core · importance 3.8
• Install or repair accessories. Core · importance 3.8
• Repair or adjust seats, doors, or windows. Core · importance 3.7
• Dismount, mount, and repair or replace tires. Core · importance 3.7
• Align front ends and suspension systems. Core · importance 3.6
• Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles. Core · importance 3.4
• Operate valve-grinding machines to grind and reset valves. Supplemental · importance 3.1

Work activities

• Troubleshoot equipment or systems operation problems.
• Repair non-engine automotive or vehicle components.
• Adjust vehicle components according to specifications.
• Service green vehicles to make repairs or maintain good working order.
• Monitor resources.
• Measure equipment outputs.
• Install vehicle parts or accessories.
• Repair tires.
• Select tools, equipment, or technologies for use in operations or projects.
• Inspect mechanical components of vehicles to identify problems.
• Service vehicles to maintain functionality.
• Lubricate equipment to allow proper functioning.
• Operate cranes, hoists, or other moving or lifting equipment.
• Operate transportation equipment to demonstrate function or malfunction.
• Observe equipment in operation to detect potential problems.
• Test mechanical equipment to ensure proper functioning.
• Adjust equipment to ensure optimal performance.
• Measure distances or dimensions.
• Repair defective engines or engine components.
• Rewire electrical or electronic systems.
• Replace worn, damaged, or defective mechanical parts.
• Rebuild parts or components.
• Dismantle heavy equipment or machinery.
• Align equipment or machinery.
• Grind parts to required dimensions.

Knowledge, skills & abilities

O*NET importance rating, from 1 (not important) to 5 (extremely important).

Knowledge

Transferable skills

Abilities

Essential skills

Skills in demand

Skills employers ask for in job postings for this occupation (Lightcast), with whether each is a common or specialized skill.

• Finger Dexterity Common Skill
• Deductive Reasoning Common Skill
• English Language Common Skill
• Information Ordering Specialized Skill
• Equipment Maintenance Specialized Skill
• Mathematics Common Skill
• Visualization Specialized Skill
• Critical Thinking Common Skill
• Inductive Reasoning Common Skill
• Equipment Selection Specialized Skill
• Depth Perception Common Skill
• Time Management Common Skill
• Speech Recognition Specialized Skill
• Microsoft Word Common Skill
• Microsoft Excel Common Skill
• Complex Problem Solving Common Skill
• Active Listening Common Skill
• Systems Analysis Specialized Skill
• Reading Comprehension Common Skill
• Physics Specialized Skill
• Social Perceptiveness Common Skill
• Learning Strategies Specialized Skill
• Active Learning Common Skill
• Chemistry Specialized Skill
• Writing Common Skill
• Telecommunications Specialized Skill
• Psychology Specialized Skill
• Instructing Specialized Skill
• Installation Specialized Skill
• Biology Specialized Skill
• Negotiation Common Skill
• Database Software Specialized Skill
• Geography Specialized Skill
• Foreign Language Common Skill

Tools & technology

Work context

How characteristic each condition is of the job, on O*NET's 1–5 context scale (higher = more present in day-to-day work). Each condition links to how it varies across all occupations.

How to get in

Job zone

Zone 3 — Job Zone Three: Medium Preparation Needed

Education

Most occupations in this zone require training in vocational schools, related on-the-job experience, or an associate's degree.

Typical entry-level education

High school diploma or equivalent · BLS, the typical path — not a requirement

Related experience

Previous work-related skill, knowledge, or experience is required for these occupations. For example, an electrician must have completed three or four years of apprenticeship or several years of vocational training, and often must have passed a licensing exam, in order to perform the job.

Preparation level

SVP (6.0 to < 7.0) — total schooling plus on-the-job experience.

What to study: Mechanic and Repair Technologies/Technicians . Fields of study crosswalked to this occupation (NCES CIP–SOC), not a requirement.

Education of current workers

Share of people in this occupation at each level of education.

Interests & work styles

The interests and personal qualities O*NET associates with people who do this work.

Career interests (Holland / RIASEC)

Interest areas

Work styles

Wages & employment

U.S. · annual wages (BLS OEWS)

Industries that employ this occupation

Where these workers are employed, by number of jobs (national, BLS OEWS). Pay shown is the occupation's national median, not industry-specific.

Where this work is most concentrated

Industries where this occupation is far more common than in the economy as a whole. The location quotient is how many times more concentrated it is here (a value of 5 means five times its economy-wide share).

Related occupations

Part of the Supply Chain & Transportation career cluster.

• Mobile Heavy Equipment Mechanics, Except Engines · 49-3042.00 Compare →
• Rail Car Repairers · 49-3043.00 Compare →
• Automotive Service Technicians and Mechanics · 49-3023.00 Compare →
• Motorboat Mechanics and Service Technicians · 49-3051.00 Compare →
• Outdoor Power Equipment and Other Small Engine Mechanics · 49-3053.00 Compare →
• Engine and Other Machine Assemblers · 51-2031.00 Compare →
• Motorcycle Mechanics · 49-3052.00 Compare →
• Electric Motor, Power Tool, and Related Repairers · 49-2092.00 Compare →
• Aircraft Mechanics and Service Technicians · 49-3011.00 Compare →
• Farm Equipment Mechanics and Service Technicians · 49-3041.00 Compare →
• Industrial Truck and Tractor Operators · 53-7051.00 Compare →
• Stationary Engineers and Boiler Operators · 51-8021.00 Compare →

Side-by-side comparisons place two occupations’ pay, preparation, skills, and AI exposure on the same page — same data, same scale, no forecast.

What you can do with this

Options the data surfaces for Bus and Truck Mechanics and Diesel Engine Specialists — not advice or a forecast. Each is a real cross-link you can follow into the evidence.

Sources for this page

Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.

• O*NET 30.3 U.S. Department of Labor / National Center for O*NET Development
• BLS Occupational Employment and Wage Statistics (OEWS) May 2024 U.S. Bureau of Labor Statistics
• BLS Employment Projections 2024–2034 U.S. Bureau of Labor Statistics
• Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27) Anthropic
• Microsoft “Working with AI” working-with-ai Microsoft Research
• “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130 OpenAI / academic
• AI Occupational Exposure (AIOE) Felten, Raj & Seamans academic
• ILO / Gmyrek et al. GenAI exposure gradient 2025 International Labour Organization
• IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022 Institute for Structural Research (IBS)
• Frey & Osborne (2013) frey-osborne-automation academic
• Dingel & Neiman (2020) dingel-neiman-workathome academic

Data compiled June 2, 2026. Figures are estimates, not advice.

@misc{singulariki-role-49-3031-00,
  title  = {Bus and Truck Mechanics and Diesel Engine Specialists},
  author = {{Singulariki}},
  year   = {2026},
  note   = {O*NET 30.3; BLS Occupational Employment and Wage Statistics (OEWS) May 2024; BLS Employment Projections 2024–2034; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); Microsoft “Working with AI” working-with-ai; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130; AI Occupational Exposure (AIOE) Felten, Raj & Seamans; ILO / Gmyrek et al. GenAI exposure gradient 2025; IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022; Frey & Osborne (2013) frey-osborne-automation; Dingel & Neiman (2020) dingel-neiman-workathome. Accessed June 7, 2026},
  url    = {https://singulariki.com/roles/role-49-3031-00}
}