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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Automatic Transmission - 8L90 (M5U) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Control Valve Body Assembly Disassemble >> Single Use Fasteners and Components

Single Use Fasteners and Components

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. GM3681787Courtesy of GENERAL MOTORS COMPANY

    Disconnect the wiring harness connectors.

  2. Automatic Transmission Control Wiring Harness (1) - Remove
  3. Remove and DISCARD the Wiring Harness Retainer (2), they are not reusable.
  4. GM5483676Courtesy of GENERAL MOTORS COMPANY

    Control Valve Channel Plate Bolt (1) - Remove [19x]

  5. Control Valve Channel Plate (2) - Remove
    6. CAUTION:

    Do not use the old spacer plate. Install a NEW spacer plate. Reusing an old spacer plate may cause internal transmission leaks and transmission damage.

  6. Control Valve Channel Plate Spacer Plate (3) - Remove and DISCARD
  7. GM5483677Courtesy of GENERAL MOTORS COMPANY

    Signal Accumulator Piston Spring (1) - Remove [7x]

  8. Signal Accumulator Piston (2) - Remove [7x]
    9. NOTE:

    Observe the position of the ball check valves.

  9. Cooler Flow Blowoff Ball Valve (3) - Remove [3x]
  10. GM5483678Courtesy of GENERAL MOTORS COMPANY

    Control Valve Solenoid Body Bolt (1) - Remove [8x]

  11. Control Valve Solenoid Body (2) - Remove
    12. NOTE:

    Note the position of the ball check valve.

  12. Control Valve Body Ball Check Valve (3) Without Surge Accumulator: [1x ]With Surge Accumulator: - Remove [3x]
    13. NOTE:

    Note the position of the ball check valve.

  13. Cooler Flow Blowoff Ball Valve (4) - Remove
  14. GM5483679Courtesy of GENERAL MOTORS COMPANY

    Control Valve Body Spacer Plate Retainer (1) - Remove and DISCARD [2x]

    15. CAUTION:

    Do not use the old spacer plate. Install a NEW spacer plate. Reusing an old spacer plate may cause internal transmission leaks and transmission damage.

  15. Control Valve Body Spacer Plate (2) - Remove
    16. NOTE:

    Note the position of the ball check valves.

  16. Cooler Flow Blowoff Ball Valve (3) - Remove [4 or 5x ] - Model Dependent
  17. GM3681791Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Fluid Pump Bolt (1) - Remove [5x ]

  18. Automatic Transmission Fluid Pump (2) - Remove
  19. Automatic Transmission Fluid Pump Seal (3) - Remove and DISCARD
  20. Automatic Transmission Fluid Pump Gasket (4) - Remove and DISCARD
  21. Automatic Transmission Fluid Pump Drive Shaft Bushing (5) - Remove
  22. Automatic Transmission Fluid Pump Passage Sleeve (6) - Remove
    23. NOTE:

    Only remove the locator pins if they need to be replaced.

  23. Automatic Transmission Fluid Pump Locating Pin (7) - Remove [2x]
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