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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 33 (AUTOMATIC TRANSMISSION - ALLISON - DIAGNOSTICS (DTCs P0878-P2723)) >> DTC P1688 >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different variant/trim than selected.

This diagnostic procedure supports the following DTC:

DTC P1688 Unmanaged Engine Torque Delivered to Transmission Control Module (TCM) Signal

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