OEM 2005 GMC Savana 2500 Engine Control Module

2005 GMC Savana 2500 Parts Questions & Experts Answers

• Q: What does the service of the engine control module (ECM) typically involve on 2005 GMC Savana 2500?

  A: The powertrain control module (PCM) service requires a replacement of the pcm itself as well as eeprom electrically erasable programmable read-only memory programming. The pcm needs to undergo inspection before replacement to verify that the correct component is selected. The initial step should involve unpacking the new service pcm after checking the damaged part. You should switch off the ignition before dealing with pcm connectors because this prevents electromechanical component damage. You should check that connector gaskets along with cleaning all debris from pcm connector surfaces because gaskets defend against contaminants entering. The new programer must perform the software update for the pcm. The start of pcm replacement begins by retrieving engine oil life percentage through a scan tool before programming this information prevents the module from defaulting to 100 percent which requires an oil change at 5,000 km (3,000 mi) from the last service. Before starting disconnect both the negative Battery Cable then the pcm harness connectors taking care to avoid touching their pins or soldered parts so esd will not damage the system. First remove the pcm from the engine compartment by releasing the spring latch then lifting it out from the mounting tray. To install the pcm first fit it back into the mounting tray then apply the spring latch followed by connecting pcm connectors while tightening the fasteners to 8 n.m (71 lb in). Finish by reconnecting the negative Battery Cable followed by programming the pcm when dealing with new units.