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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) >> Installation Procedure

Installation 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 Control Wiring Harness Connectors
    GM4074155Courtesy of GENERAL MOTORS COMPANY
    NOTE: The new replacement wiring harness may not have electrical connector (2). It will be a one piece harness.
    NOTE: Be sure to remove any labels used to mark and identify the connectors during removal.
  1. Install automatic transmission control wiring harness (4).
  2. If necessary, install the control valve body to the transmission. Refer to Control Valve Body Replacement (M5N) 
  3. Connect the wiring harness clip (5) to the valve body.
  4. Connect the transmission control wiring harness connectors (1).
  5. If equipped, connect the transmission control wiring harness connector (2), and ensure the valve body connector retainer is latched (3).
  6. Fig 2: Transmission Fluid Filter
    GM3794350Courtesy of GENERAL MOTORS COMPANY
  7. Install the transmission fluid filter (4) and all other related components. 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) .