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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1309 (Engine Controls And Fuel - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of ECM & Bracket
    GM1703439Courtesy of GENERAL MOTORS CORP.
  1. Install the bottom ECM tabs into the bracket.
  2. Push the ECM in securing the ECM to the bracket.
    3. Fig 2: View Of ECM Components
    GM1703437Courtesy of GENERAL MOTORS CORP.
  3. Position the engine wiring harness lower electrical connector and engage the retainer (3) securing the lower connector (4) to the ECM.
  4. Position the engine wiring harness upper electrical connector and engage the retainer (2) securing the upper connector (1) to the ECM.
  5. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (With Single Battery) or Battery Negative Cable Disconnection and Connection (With Auxiliary Battery) or Battery Negative Cable Disconnection and Connection (With Dual Batteries) .
  6. If a NEW ECM was installed, program the ECM. Refer to Control Module References .
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