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The 6.6L Duramax is highly rated for reliability, but maintenance is key to avoiding "Limp Mode."

Put the truck in Park (P) and keep the engine idling.

What is the exact message on your dashboard? 6.6 / 10 AcciГіnMist...

Happens while driving at speeds above 30 mph for about 20-30 minutes. No driver action is needed.

If your DIC displays a message like "Exhaust Cleaning Available" or "Exhaust Filter Full": No driver action is needed

The DPF (Diesel Particulate Filter) captures soot. When it gets full, the truck must "regenerate" to burn that soot away. 1. Understanding Regeneration Types

Low-quality diesel can clog injectors and increase soot buildup. 🔍 Critical Safety Warnings 6.6 / 10 AcciГіnMist...

Used when the filter is very full (typically 90% or higher ) and automatic cleaning hasn't happened. 2. How to Start a Manual Regeneration