GMC Workshop Manuals
Savana 3500 V8-4.8L (2009)
Powertrain Management > Computers and Control Systems > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > Page 2996
Engine Control Module: Service and Repair
Engine Control Module Replacement
Service of the engine control module (ECM) should consist of either replacement of the ECM or programming of the electrically erasable programmable
Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control
Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery
In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components
Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector
The replacement control module must be programmed.
Note: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil
1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
Charging/Battery/Battery Cable/Service and Repair).
3. Disconnect the engine wiring harness electrical connectors (2) from the ECM (1).
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