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Diesel & Heavy Duty
Duramax, Powerstroke, Cummins — plus semi trucks.
What this certification means
Diesel & Heavy Duty covers diesel-powered light-duty trucks (Duramax, Powerstroke, Cummins) and Class 7-8 heavy-duty operations. Premium-value certification.
What it covers
- Diesel fuel systems: high-pressure common rail, HEUI, mechanical injection
- Turbocharger diagnosis and service (VGT, twin-turbo)
- DPF (diesel particulate filter) service and regeneration
- EGR system diagnosis and service
- DEF (diesel exhaust fluid) system diagnosis
- Fuel injector testing (electronic and mechanical)
- Boost leak testing methodology
- Class 7-8 introductions: air brake, PTO, heavy-duty electrical
Who this is for
Mobile diesel mechanics — a high-margin specialization where jobs pay 1.5-2x standard rates.
Exam
75 questions · 90 minutes · 78% to pass
Price
$59
Includes
Digital badge + printed certificate + verify page
Valid for
24 months · $25 recertification
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