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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (Automatic Transmission - ALLISON - Introduction (2 Of 2)) >> Repair Instructions >> Transmission Internal Mode Switch Replacement

Transmission Internal Mode Switch Replacement

WARNING: This page is about a different variant/trim than selected.
IMPORTANT: The Internal Mode Switch (IMS) is mounted to the manual shift shaft detent lever as an assembly. The components of the detent lever/IMS assembly cannot be individually serviced. When the IMS needs replacing, the entire assembly must be replaced.

Replace the IMS. Refer to Manual Shift Shaft, Detent Lever, and Position Switch Assembly Replacement .