Duramax-shift-inhibited -

Before you call the tow truck, check these common—and often inexpensive—areas: Lly Duramax range shift inhibited code solution? - Facebook

Troubleshooting "Range Shift Inhibited": A Guide for Duramax Owners duramax-shift-inhibited

Essentially, the has blocked a shift because certain parameters weren't met. This often results in the truck being stuck in Neutral or a "limp mode" gear (typically 3rd) to prevent catastrophic mechanical failure. Common Culprits to Check First Before you call the tow truck, check these