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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 707 (Automatic Transmission - 10L1000 (MGM MGU) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P27A7-P27AE >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

The following components have a unique current versus oil pressure characteristic that is used to properly upshift or downshift the transmission:Transmission Control Solenoid Valve 1 - 8

The data for each solenoid valve is programmed into the control module K71.

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