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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1055 (Automatic Transmission - ALLISON - DTC P0877 To DTC P2670) >> DTC P1779 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles currently using the 8.1 liter gas engine use a 3 wire system to communicate engine torque data/requests between the engine control module (ECM) and the transmission control module (TCM).

DTC P1779 is a type B DTC.

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