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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 944 (Engine Controls - 6.6L (LLY) (Introduction)) >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the ECM.
    IMPORTANT: The cover must be fully installed prior to the electrical connections being made to ensure the ECM is fully seated in the bracket.
    Fig 1: ECM Cover Retaining Tabs
    GM1334382Courtesy of GENERAL MOTORS CORP.
  2. Install the ECM cover to the bracket.
  3. Engage the ECM cover retaining tabs.
    4. Fig 2: View Of ECM Electrical Connectors
    GM1334384Courtesy of GENERAL MOTORS CORP.
  4. Connect the ECM electrical connectors (2).
  5. 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.
  6. If a NEW ECM was installed, program the ECM. Refer to Service Programming System (SPS) in Programming.
  7. Perform the turbocharger learn procedure. Refer to Turbocharger Learn Procedure .
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