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Home >> GMC >> 2009 >> Envoy 5.3 M, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L & 6.0L - Introduction >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Identifying ECM/TCM Bracket Retaining Bolts
    GM1521466Courtesy of GENERAL MOTORS CORP.
  1. If the ECM/TCM bracket (1) was previously removed, install the ECM/TCM bracket (1) to the vehicle frame.
  2. Install the ECM/TCM bracket retaining bolts (2).
    3. CAUTION: Refer to Fastener Caution .
  3. Tighten the ECM/TCM bracket bolts to 10 N.m (89 lb in).
  4. Install the TCM. Refer to Transmission Control Module Replacement (LL8) or Transmission Control Module Replacement (LH6) .
    5. Fig 2: Identifying ECM/TCM Bracket Upper Retainers
    GM1804527Courtesy of GENERAL MOTORS CORP.
  5. Insert the ECM into the retaining slots of the ECM/TCM bracket.
  6. Secure the ECM to the bracket ensuring that the ECM retaining tabs (1) are fully engaged.
    7. Fig 3: View Of ECM
    GM1804524Courtesy of GENERAL MOTORS CORP.
  7. Connect the engine wiring harness electrical connectors to the ECM.
    8. Fig 4: View Of ECM/TCM & Cover
    GM1804523Courtesy of GENERAL MOTORS CORP.
  8. Install the ECM/TCM cover.
  9. Ensure the ECM/TCM cover retainers (1) are fully engaged to the ECM/TCM bracket.
  10. Connect the cooling fan electrical connector.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  12. If the ECM was replaced the replacement ECM must be programmed. Refer to Control Module References .
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