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Home >> GMC >> 2021 >> Terrain SLT, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Control Valve Body Cover Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2020 GMC Terrain and 2020 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9) .
  2. Remove the charge air cooler outlet air tube. Charge Air Cooler Outlet Air Tube Replacement .
  3. Remove the transmission control module bracket. Transmission Control Module Bracket Replacement 
  4. Drain the transmission fluid. Transmission Fluid Drain and Fill 
  5. GM4594687Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission fluid cooler pipe nut (1) from the transmission.

  6. Reposition the transmission fluid cooler pipes (2) out of the way.
  7. GM4594706Courtesy of GENERAL MOTORS COMPANY

    Disconnect the control valve body transmission control module electrical connector (1), then unclip the wiring harness from the cover.

  8. Remove the body ground cable and wiring harness assembly mounting bolt at front of transmission and position ground cable and harness out of the way.
  9. GM4489055Courtesy of GENERAL MOTORS COMPANY

    Remove the control valve body cover bolts (1, 2).

  10. GM4489058Courtesy of GENERAL MOTORS COMPANY

    Remove the control valve body cover (1).

  11. Clean the transmission case and control valve body cover gasket surfaces. Inspect and replace the gasket as necessary.