Put the truck in Park (P) and keep the engine idling.
The 6.6L Duramax is highly rated for reliability, but maintenance is key to avoiding "Limp Mode."
Always keep your Diesel Exhaust Fluid (DEF) topped up to prevent speed de-rating.
What is the of your truck (e.g., 2024 Silverado 2500)? Are you currently experiencing a power loss (Limp Mode) ?
Happens while driving at speeds above 30 mph for about 20-30 minutes. No driver action is needed.
The engine RPM will increase significantly. This can take 30 to 50 minutes . Do not turn off the engine until the message says cleaning is complete. 🛡️ Best Practices for Longevity