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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 143 (Automatic Transmission - 4L80-E/4L85-E - DTC P0218 To DTC P0976) >> DTC P0563 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

The transmission control module (TCM) continuously monitors the system voltage on the ignition 1 and the battery voltage circuits. Higher than normal voltage may cause the solenoids inside the transmission to operate improperly or damage solid-state components inside the TCM.

When the TCM detects high voltage, DTC P0563 sets. DTC P0563 is a type C DTC.

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