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HOMESERVICE MANUALSSATURN2003ION 3 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (AUTOMATIC TRANSMISSION - VT25-E)REPAIR INSTRUCTIONSCONTROL VALVE BODY COVER REPLACEMENTREMOVAL PROCEDURE
2003 Saturn Ion 3 4D Sedan, Standard

Removal Procedure

2003 Saturn Ion 3 4D Sedan, StandardSECTION Removal Procedure
WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Battery.
  2. Remove the transmission control module (TCM). Refer to Transmission Control Module Replacement .
  3. Remove the positive battery post from the underhood junction block (2).
  4. Disconnect the positive battery cables from the underhood junction block (1).
  5. Disconnect the surge tank inlet hose from the surge tank.
    Fig 1: Removing Positive Battery Post & Positive Battery Cables From Underhood Junction Block
    G02126108Courtesy of GENERAL MOTORS CORP.
  6. Remove the underhood junction block bracket nuts (1,2).
  7. Loosen the underhood junction block bracket bolt (3).
  8. Disconnect the front wiring harness from the underhood junction block bracket.
    Fig 2: Removing Underhood Junction Block Bracket Nuts & Loosening Bolt
    G02126109Courtesy of GENERAL MOTORS CORP.
  9. Reposition the underhood junction block bracket aside.
    Fig 3: Repositioning Underhood Junction Block Bracket Aside
    G02126110Courtesy of GENERAL MOTORS CORP.
  10. Remove the transmission vent cap.
  11. Remove the 17 bolts from the control valve body cover.
  12. Remove the control valve body cover.
  13. Remove the control valve body cover gasket. Discard the gasket.
    Fig 4: Removing Transmission Vent Cap, Control Valve Body Cover, Bolts & Gasket
    G02126111Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.