GM / Chevrolet / GMC 6.6L Duramax
Duramax emissions & DEF diagnostics
Lawful diagnosis and repair of DPF (LMM onward), DEF/SCR (LML onward), EGR and NOx sensors.
Why this matters on the 6.6L Duramax
Later Duramax engines rely on DPF, EGR and DEF systems. We diagnose and repair emissions equipment back to its factory function. We do not remove, delete or defeat DPF, EGR, SCR or other emissions systems.
Symptoms owners notice
- Frequent regeneration
- DEF warnings
- EGR codes
What we check
- DPF pressure
- NOx sensors
- DEF dosing
Repair work involved
- Emissions repairs to factory specification
Trucks with the 6.6L Duramax
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