Track DSL
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
$19.99
Includes
Digital badge + printed certificate + verify page
Valid for
5 years · $19.99 recertification
EXAM AVAILABLE NOW
Ready to certify? Take the DSL exam.
45 questions · 60 minutes · 75% to pass · $19.99 · Digital certificate on pass
Immediate access, take the exam within 30 days at your convenience. Failed exams have a 72-hour retake period at no extra charge.