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Home >> GMC >> 2001 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L - Repair Instructions >> Repair Instructions >> Powertrain Control Module Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: PCM Mounting Hardware And Harness Connectors
    GM334905Courtesy of GENERAL MOTORS COMPANY
  1. Install the PCM (4) to the PCM mounting bracket (7) ensuring that the mounting tabs (3) are engaged.
  2. Secure the spring latch (2) to the PCM.
  3. Refer to Fastener Notice in Cautions and Notices.

    Connect the PCM connectors (6) to the PCM (4).

    Tighten 

    Tighten the PCM connector end bolts to 8 N.m (71 lb in).

  4. Install the PCM cover (8) to the PCM mounting bracket (7), ensuring the mounting tabs on the PCM mounting bracket are engaged into the mounting holes in the PCM cover.
  5. If a new PCM is being installed, program the EEPROM. Refer to Powertrain Control Module Programming (On-Board) , Powertrain Control Module Programming (Off-Board) .