If you’re staring at a flashing "Range Shift Inhibited" message on your Duramax’s driver information center, you’re likely feeling a mix of frustration and dread. This message is the Allison transmission’s way of saying it has detected a condition that could cause damage, so it is refusing to shift into the requested gear to protect itself.
Troubleshooting "Range Shift Inhibited": A Guide for Duramax Owners duramax-shift-inhibited
While it often feels like a death sentence for your transmission, the fix is frequently much simpler than a full rebuild. What Does "Range Shift Inhibited" Actually Mean? If you’re staring at a flashing "Range Shift