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Home >> Cadillac >> 2018 >> CTS V >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 8L45 (M5N) Or 8L90 (M5U) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Transmission Control Wiring Harness Replacement (M5N) >> Installation Procedure

Installation Procedure

  1. GM4074155Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The new replacement wiring harness may not have electrical connector (2). It will be a one piece harness.

    Install automatic transmission control wiring harness (4).

  2. If necessary, install the control valve body to the transmission. 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 1: Exploded View Of Transmission Fluid Pan, Filter, Filter Seal, Gasket And Bolts (With Tightening Sequence)
    GM3794350Courtesy of GENERAL MOTORS COMPANY

    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) .