Installation Procedure

Fig 1: View Of ECM Bolts

Courtesy of GENERAL MOTORS CORP.

Install the ECM.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the ECM bolts.
Tighten: Tighten the engine control module bolts to 8 N.m (71 lb in).
Connect the J 1 and J 2 ECM electrical connectors.
Install the outlet resonator/duct assembly into position.
Connect the PCV fresh air vent hose assembly.
Tighten the clamp at the throttle body assembly.
Position the outlet resonator/duct assembly up with the support bracket and install the push-pin.
Tighten the clamp at the air cleaner assembly.
Connect the intake air temperature (IAT) sensor connector.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

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.

IMPORTANT: Ensure the original ECM has the correct VIN and vehicle options.

Reprogram the ECM. Refer to Service Programming System (SPS) in Programming.

IMPORTANT: The new ECM must learn the passlock password from the BCM. When the ECM reprogram is completed, use the SSS to perform the ECM Passlock Relearn Procedure.

Perform the Passlock Relearn Procedure using the Service Stall System (SSS).
Turn the ignition to OFF for 10 seconds.

IMPORTANT: Following the ECM reprogramming, the ECM will have to learn the crankshaft notch variation for misfire diagnostics.

Perform the crankshaft relearn procedure. Refer to CKP System Variation Learn Procedure .
Verify no DTCs exist. If one exists, refer to the specific DTC diagnostic.