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Home >> Chevrolet >> 2011 >> Chevy Express G2500, Van Cargo Extended, 6.6 L >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 6.6L (LGH) - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

  1. Using a scan tool, capture the ECM data.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  3. Reposition the master cylinder without disconnecting the brake lines. Refer to Master Cylinder Replacement .
  4. Fig 1: ECM And Mounting Bolts
    GM2535261Courtesy of GENERAL MOTORS CORP.

    Remove the ECM mounting bolts (1).
  5. Release the ECM upper retaining tabs (2).
  6. Disconnect the ECM electrical connectors (3).
  7. Remove the ECM (4) from the bracket.
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