6.6 / 10 Acciгіnmist... Apr 2026

Always keep your Diesel Exhaust Fluid (DEF) topped up to prevent speed de-rating.

The 6.6L Duramax is highly rated for reliability, but maintenance is key to avoiding "Limp Mode." 6.6 / 10 AcciГіnMist...

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