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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - VT40 (MRG) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P27A7-P27AC >> Circuit/System Description

Circuit/System Description

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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 - 6

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

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