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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Automatic Transmission - 6T50 (M2D) - Description And Operation) >> Description And Operation >> Manual Mode Description And Operation >> Circuit System Description

Circuit System Description

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The K9 Body Control Module provides the signal circuit to the S2 Transmission Manual Shift Switch and the ground circuit is connected to chassis ground. The K9 Body Control Module monitors the voltage on the signal circuit. The voltage drop across the S2 Transmission Manual Shift Switch changes when the plus (+) or minus (-) button is pressed. The K9 Body Control Module communicates the shift request to the K71 Transmission Control Module via serial data.