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Home >> GMC >> 2004 >> Sierra 2500, 4D Pickup, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 4.8L, 5.3L, & 6.0L (Introduction) >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure

Installation Procedure

  1. Install the PCM.

    Ensure that the mounting tabs are engaged.

  2. Secure the spring latch to the PCM.
    3. Fig 1: View Of PCM
    GM814119Courtesy of GENERAL MOTORS CORP.
  3. Connect the PCM electrical connectors.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Tighten the PCM electrical connector bolts (2).

    Tighten:  Tighten the bolts to 8 N.m (71 lb in).

    5. Fig 2: View Of PCM Electrical Connectors
    GM814117Courtesy of GENERAL MOTORS CORP.
  5. Install the PCM cover.
    6. Fig 3: View Of PCM Cover & Mounting Bracket
    GM814118Courtesy of GENERAL MOTORS CORP.
  6. If equipped with RPO NYS, install the harness ground clip to the PCM cover.
    7. Fig 4: Harness Ground Clip At PCM Cover
    GM865883Courtesy of GENERAL MOTORS CORP.
  7. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  8. If a NEW PCM was installed, program the PCM. Refer to Service Programming System (SPS) in Programming.
  9. Perform the crankshaft position (CKP) system variation learn procedure. Refer to CKP System Variation Learn Procedure .
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