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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Transmission Control Wiring Harness Replacement (M5N) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Transmission Fluid Filter
    GM3794350Courtesy of GENERAL MOTORS COMPANY
  1. Remove the transmission fluid filter (4). Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (Rear Wheel Drive) Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (All Wheel Drive) .
  2. Fig 2: Transmission Control Wiring Harness Connectors
    GM4074155Courtesy of GENERAL MOTORS COMPANY
    NOTE: Mark and identify electrical connectors before removal to ensure correct installation.
  3. Release the transmission control wiring harness connectors (1).
  4. Carefully disconnect the wiring harness clip (5) from the valve body.
    NOTE: If replacing the wiring harness, the new wiring harness may not have electrical connector (2). If it does not have electrical connector (2), the control valve body will have to be removed.
  5. If necessary, remove the control valve body from the transmission. Refer to Control Valve Body Replacement (M5N) 
  6. If equipped, unlatch the connector retainer (3), then disconnect the main connector (2).
  7. Remove the transmission control wiring harness (4).