Diesel Mechanic

O*NET: Bus and Truck Mechanics and Diesel Engine Specialists·49-3031.00

The Verdict:Diesel mechanics perform hands-on repairs inside massive engines, transmissions, and chassis of trucks and buses — greasy disassembly in tight spaces no robot handles today. Diagnostics get AI assistance, boosting efficiency, but physical craft in variable conditions remains human. No displacement evidence, and regulatory certifications add stability over the next decade.

Resilience Score

/100

Resilient

Score tiers

Highly Resilient81–100

Resilient61–80

Moderate Risk41–60

High Risk21–40

Critical Risk0–20

How is this scored?

Task Resilience

How much of this role's daily work remains beyond AI and robotic automation.

30% of score

Physical Presence

The degree to which this job needs a human present — hands-on, in the field, or in the room.

20% of score

Human Necessity

How important the unique human edge is — for trust, accountability, or judgment.

15% of score

Regulatory Shield

How strong the legal requirement is for a human in this job (by law, licensing, or credentials).

13% of score

Technological Maturity

How far AI remains from performing this role's core functions.

10% of score

Displacement Evidence

The volume of jobs in this field being eliminated by AI or automation right now.

12% of score

Score last updated: March 2026Full methodology

Avg Salary

Median annual wage from the Bureau of Labor Statistics Occupational Employment and Wage Statistics (OEWS), May 2024 release.

$61k

Job Growth (10yr)

Projected change in total number of jobs (not salary) from 2024–2034. Source: Bureau of Labor Statistics Employment Projections.

+2.4%

AI Exposure

Percentage of this role's analyzed tasks that AI can handle autonomously or nearly so. 0 of 26 tasks are classified as AI-exposed.

Low exposure

Task Analysis

This role's core work is hard to automate.
21 of 26 tasks require human judgment, presence, or trust. The 19% that are AI-leverage offer an edge — professionals who learn these tools will outperform those who don't.

0exposed

5AI leverage

21human-essential

View all 26 tasks

AI Can Handle This0 tasks

Tasks AI can do autonomously or nearly so

No exposed tasks identified

AI Leverage5 tasks

Master these tools — humans who do outperform those who don't

Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.

Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.

Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.

Measure vehicle emissions to determine whether they are within acceptable limits.

Follow green operational practices involving conservation of water or energy or reduction of solid waste.

Human Advantage21 tasks

Tasks requiring trust, presence, or novel judgment

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.

Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.

Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.

Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.

Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.

Examine and adjust protective guards, loose bolts, and specified safety devices.

Rewire ignition systems, lights, and instrument panels.

Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.

Diagnose and repair vehicle heating and cooling systems.

Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors.

Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.

Adjust or repair computer controlled exhaust emissions devices.

Rebuild gas or diesel engines.

Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.

Recondition and replace parts, pistons, bearings, gears, and valves.

Install or repair accessories.

Repair or adjust seats, doors, or windows.

Dismount, mount, and repair or replace tires.

Align front ends and suspension systems.

Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.

Operate valve-grinding machines to grind and reset valves.

Resilience Landscape

Diesel Mechanic lands in Stable, Lower Pay

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