Train Faster. Diagnose Better. Fix More.

DLU is our online training library covering the systems and tools diesel techs use every day: aftertreatment, electrical diagnostics, hydraulics, scan tools, and more. Learn at your pace, then apply it in the bay.

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What You'll Learn

DLU is built for the realities of diesel work: Limited time, real deadlines, and problems that don’t match the textbook. These courses are designed to help techs diagnose faster, understand systems deeper, and make better decisions in the bay.

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Diagnose SCR and aftertreatment issues with confidence—understand theory, common failures, and troubleshooting workflows.

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Go beyond “parts swapping.” Build real electrical skill: datalink, duty cycle, oscilloscopes, and diagnostic process.

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Get more out of the tools you already own, walkthroughs and training for popular platforms and OEM software

A Learning Library You Can Actually Use on the Job

Here’s a sample of what’s inside Diesel Laptops University:

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  • Aftertreatment & Emissions (including Spanish options)
  • Electrical Diagnostics 1 & 2 (including Spanish options)
  • Oscilloscopes: Intro, Software, Amp Clamps, Datalink
  • Pico Diesel Diagnostics (Part 1 & 2)
  • Diagnostic Software: Cummins Insite, Detroit Diagnostic Link 8, Cojali Jaltest, TEXA (plus Spanish options)
  • Hydraulic Principles, Pumps, Schematics, Valves
  • Starting & Charging, ABS, HVAC, Drivetrain Fundamentals
  • Partner/vendor training (Lite-Check, Horton, Donaldson, Enersys, Vanair, and more)
  • Aftertreatment & Emissions (including Spanish options)
  • Electrical Diagnostics 1 & 2 (including Spanish options)
  • Oscilloscopes: Intro, Software, Amp Clamps, Datalink
  • Pico Diesel Diagnostics (Part 1 & 2)
  • Diagnostic Software: Cummins Insite, Detroit Diagnostic Link 8, Cojali Jaltest, TEXA (plus Spanish options)
  • Hydraulic Principles, Pumps, Schematics, Valves
  • Starting & Charging, ABS, HVAC, Drivetrain Fundamentals
  • Partner/vendor training (Lite-Check, Horton, Donaldson, Enersys, Vanair, and more)
Explore the Full Course Library
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Vehicle Health Reports

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Technician Performance Tracking

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Technical Repair Intelligence

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Proven Expertise on Demand

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Standardization at Scale

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Enterprise Grade Retention

Training That Fits How You Work

Access training online and learn on your schedule.

Our training is built by people who do the work. We combine Diesel Laptops’ internal subject matter experts — technicians, support specialists, and product leaders — with trusted third-party industry partners to create practical, job-ready courses. The result is world-class training that’s clear, current, and designed to help techs diagnose faster and fix with confidence.

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Ready to Turn Training into an Advantage?

Get access to Diesel Laptops University and start learning the systems and tools you work with every day.

Sign Up for Free

Common Questions

Does Diesel Laptops training help with real-world diagnostics?

Yes, the training is designed with real-world scenarios in mind. Courses walk through actual diagnostic processes, helping technicians understand how to identify root causes, interpret fault codes, and perform repairs efficiently.

Can I access Diesel Laptops online training anytime?

Yes, all training courses are available online and can be accessed anytime. This allows technicians to learn at their own pace, whether in the shop, at home, or on the road.

Who is this diesel diagnostics training designed for?

Diesel Laptops training is designed for diesel technicians of all skill levels, from beginners to experienced professionals. It’s also valuable for shop owners, service managers, and fleet maintenance personnel looking to improve diagnostic efficiency and reduce downtime.

Do I need a diagnostic tool to enroll in online training?

No, you can take the training without owning diagnostic tools. However, pairing the training with diagnostic software or hardware (like our many OEM tools) helps reinforce what you learn and improves hands-on application.

What kind of time commitment do these online training courses require?

Course length varies depending on the topic, but most training modules are designed to be completed in short, focused sessions. This allows technicians to learn in manageable segments without disrupting their workflow.

What is included in Diesel Laptops online training?

Diesel Laptops online training includes a wide range of courses covering heavy-duty truck diagnostics, fault code troubleshooting, aftertreatment systems, electrical diagnostics, and OEM software usage. The platform provides step-by-step instruction designed for technicians, shop owners, and fleet maintenance teams.

Can businesses and fleets enroll multiple techs in online training?

Yes, Diesel Laptops training is ideal for fleets and repair shops. Businesses can enroll multiple technicians to standardize training, improve diagnostic accuracy, and reduce repair time across their team.