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Home >> Buick >> 2005 >> Park Avenue Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction >> 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. Fig 1: Removing/Installing Air Cleaner Top Cover
    GM55493Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  2. Disconnect the negative battery cable.
  3. Remove the screws from the air cleaner top cover.
  4. Remove the air cleaner top cover.
    5. Fig 2: Disconnect/Reconnecting Harness Connectors At Powertrain Control Module (PCM)
    GM186521Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the harness connectors from the PCM.
    6. Fig 3: Removing PCM From Air Cleaner Housing Assembly
    GM186523Courtesy of GENERAL MOTORS CORP.
  6. Remove the PCM from the air cleaner housing assembly.
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