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Home >> Chevrolet >> 2004 >> Corvette Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) -- 5.7L >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Removal Procedure
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Removal Procedure

    IMPORTANT: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Remove the wheelhouse filler panel. Refer to Wheelhouse Filler Replacement in Body Front End.
  3. Remove the throttle actuator control (TAC) module. Refer to Throttle Actuator Control (TAC) Module Replacement .
    4. Fig 1: PCM Electrical Harness Connectors
    GM519848Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the PCM electrical harness connectors.
  5. Loosen but do not remove the PCM rear retaining fastener. Use the rear retaining fastener as an anchor for the outer bracket.
  6. Remove the front retaining fastener from the PCM.
  7. Reposition the PCM outer bracket.
    8. Fig 2: PCM & Mounting Bracket
    GM519845Courtesy of GENERAL MOTORS CORP.
  8. Remove the PCM from the bracket and the vehicle.
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