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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Automatic Transmission - 8L90 (M5U) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Automatic Transmission Wiring Harness Replacement (Electrical Connector Passage) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the control valve body. Control Valve Body Replacement .
  2. Disconnect the chassis wiring harness from the transmission electrical connector.
  3. GM3802143Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connector (1).

  4. GM3802175Courtesy of GENERAL MOTORS COMPANY

    Using a flat-bladed tool, press inward the four retaining tabs (1) around the main connector, then slide the main connector (2) inward into the transmission case.

  5. Remove the automatic transmission wiring harness from the transmission.
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