Career comparison
Automotive Service Technician vs. Diesel Mechanic
Side-by-side pay, training, growth and day-to-day duties to help you choose between two related careers.
Diesel mechanics earn more at the median ($61,770 vs. $50,620), while automotive service technicians usually get to work faster (6–24 months of training). Automotive service technicians inspect, diagnose and repair cars and light trucks, including hybrids and EVs. Diesel mechanics diagnose and repair trucks, buses and diesel-powered equipment.
Pay data: BLS OEWS, May 2025 · Outlook: BLS 2025–35 · Checked October 15, 2026
| Automotive Service Technician | Diesel Mechanic | |
|---|---|---|
| Median pay | $50,620 ($24.34/hr) | $61,770 ($29.70/hr) |
| Pay range (10th–90th) | $34,660 – $81,790 | $44,530 – $88,740 |
| Job growth, 2025–35 | +5.0% (faster than average) | +3.6% (about as fast as average) |
| Openings per year | 66,200 | 24,400 |
| Typical entry education | Postsecondary nondegree award | High school diploma or equivalent |
| Training time | 6–24 months | 6–24 months |
| Key credential | ASE A1–A9 | ASE Medium-Heavy Truck (T-series) |
| Work setting | Technicians work in dealerships, independent repair shops, chain stores, fleet garages and government agencies. | Diesel mechanics work in fleet shops, dealerships, independent repair shops and on the road as field service techs. |
What each job does
Automotive Service Technician
- Perform inspections and preventive maintenance
- Diagnose problems with scan tools and test equipment
- Repair brakes, steering, suspension and drivetrain components
- Repair engines and electrical systems
- Service heating and air-conditioning systems
Diesel Mechanic
- Perform preventive maintenance inspections and services
- Diagnose problems using diagnostic software and test equipment
- Repair or rebuild engines, transmissions and drivetrains
- Inspect and repair air brakes, steering and suspension
- Service aftertreatment systems such as DPF, DEF and SCR
How they’re similar
Both careers involve hands-on work, problem-solving, indoor work, and working independently. Both are part of the mechanics, maintenance & manufacturing field, so many skills transfer between them.
Which should you choose?
Choose automotive service technician if…
- I enjoy working on cars
- I like diagnosing problems with tools and data
- I’m comfortable explaining technical problems simply
Choose diesel mechanic if…
- I love figuring out why engines and machines fail
- I don’t mind grease and heavy parts
- I’m comfortable using computers for diagnostics
Still torn? Take the Automotive Service Technician fit quiz and the Diesel Mechanic fit quiz, or the full Career Match Quiz.
Quick comparisons
Which pays more, automotive service technician or diesel mechanic?
Diesel Mechanics earn more at the median: $61,770 versus $50,620 for automotive service technicians, based on BLS May 2025 data.
Which takes less time to train for?
Automotive Service Technicians typically train faster (6–24 months) than diesel mechanics (6–24 months).
Which career has better job growth?
BLS projects automotive service technicians to grow +5.0% from 2025–35, compared with +3.6% for diesel mechanics.