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Home >> GMC >> 2001 >> Sierra 2500 HD, 2D Pickup, 6.6 1, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.6L - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure

Installation Procedure

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

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

    Tighten 

    Tighten the ECM connector end screws to 8 N.m (71 lb in).

  4. Install the ECM cover (8) to the ECM mounting bracket (7), ensuring the mounting tabs on the ECM mounting bracket are engaged into the mounting holes in the ECM cover.
  5. Connect the negative battery cable.
  6. If a new ECM is being installed, program the EEPROM.
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