Removal Procedure

IMPORTANT: It is necessary to record the remaining automatic transmission fluid life. If the replacement module is not programed with the remaining automatic transmission fluid life, the automatic transmission fluid life will default to 100%. If the replacement module is not programmed with the remaining automatic transmission fluid life, the automatic transmission fluid will need to be changed at 83000 km (50,000 mi) from the last automatic transmission fluid change.

Using a scan tool, retrieve the percentage of remaining engine oil and the remaining automatic transmission fluid life. Record the remaining engine oil and the remaining automatic transmission fluid life.

NOTE: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

Turn OFF the ignition.

Fig 1: Locating ECM Ground Wire Retaining Screw

Courtesy of GENERAL MOTORS CORP.

Remove the screw (2) securing the engine control module (ECM) ground wire (1) to the ECM (3).

Fig 2: View Of ECM Connectors & Wiring Harness Connectors

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NOTE: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins.

Flip the release levers to the open position (3) and disconnect the ECM connectors (2) from the ECM (5).

Fig 3: Locating ECM To ECM Bracket Retaining Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the nuts securing the ECM to the ECM bracket.
Remove the ECM from the ECM bracket.