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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 837 (ENGINE CONTROLS AND FUEL - 2.2L (L61) - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSENGINE CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Installation Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Installation Procedure
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of ECM Bolts
    GM932395Courtesy of GENERAL MOTORS CORP.
  1. Install the ECM.
    2. NOTE: Refer to Fastener Notice .
  2. Install the ECM bolts.

    Tighten:  Tighten the engine control module bolts to 8 N.m (71 lb in).

  3. Connect the J 1 and J 2 ECM electrical connectors.
  4. Install the outlet resonator/duct assembly into position.
  5. Connect the PCV fresh air vent hose assembly.
  6. Tighten the clamp at the throttle body assembly.
  7. Position the outlet resonator/duct assembly up with the support bracket and install the push-pin.
  8. Tighten the clamp at the air cleaner assembly.
  9. Connect the IAT sensor connector.
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (2.2L (L61) and 3.5L (L66)) or Battery Negative Cable Disconnection and Connection (2.4L (LAT)) .
    11. NOTE: If a new ECM is being installed, it must be reprogrammed with new software and calibrations. Refer to Service Stall System (SSS) User Guide for reprogramming procedures. The ECM may be damaged if the reprogramming process is interrupted. Make sure the scan tool is connected securely to the DLC and the vehicle battery has sufficient charge.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.