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Home >> GMC >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L >> Repair Instructions >> Powertrain Control Module (PCM) Replacement >> Installation Procedure
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Installation Procedure

  1. Install the PCM (1) to the PCM mounting bracket (3) ensuring that the PCM is engaged in the mounting tabs.
  2. Secure the PCM retaining clip (2) to the PCM.
    Fig 1: PCM & Mounting Bracket
    G01599171Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Connect the PCM harness connectors (4) to the PCM (1).

    Tighten 

    Tighten the PCM harness connector bolts (3) to 8 N.m (70 lb in).

  4. If a new PCM is being installed, program the PCM. Refer to Powertrain Control Module (PCM) Programming (On-Board) .
    Fig 2: PCM, Harness, Retaining Clip & Connector Bolts
    G01599172Courtesy of GENERAL MOTORS CORP.
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