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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 251 (Automatic Transmission - 2ML70 - DTC P0218 To DTC P0967) >> DTC P0562 or P0563 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. 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 voltage circuits. The TCM is located within the control solenoid (w/body and TCM) valve assembly and is not serviced separately. Lower than normal voltage may be inadequate to operate the transmission control solenoids properly. Improper solenoid operation may cause erratic transmission operation, which may result in internal transmission damage.

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