GM 15292913
ECM

A powered-up ignition should always be switched off before beginning to work on the powertrain control module (PCM). This ensures the pcm remains undamaged during power disconnection or reconnection. Remove all debris from around pcm connector surfaces before checking the installation of pcm module connector gaskets to avoid contaminant access. A scan tool allows you to retrieve engine oil life percentages which must be recorded before the replacement module installation because not programming this data will trigger a 100% default that requires an oil change within 5000 km (3,000 mi) of the last change. To begin the procedure disconnect the negative Battery Cable along with removing the harness ground clip from pcm cover when rpo nos exists. The hybrid control module (HCM) needs removal when dealing with vehicles equipped with rpo hp2. Unfasten the pcm cover mounting tabs and detach the pcm cover from its place. When disabling the electrical connectors from the pcm use care not to allow the ignition to be on while working because this could harm components. Disengage the spring latch and mounting tabs attached to the pcm before extracting the pcm from its place. The installation process requires you to enter the mounting tabs and fasten the spring latch onto the new pcm. After attaching the pcm electrical connectors install the bolts just to 8 n.m (71 lb in). Install the pcm cover along with reattaching the hcm when your vehicle has rpo hp2 and continue if your vehicle lacks this reference. Users of rpo nys should connect the harness ground clip to the pcm cover and reinstall the negative Battery Cable before pcm programming if needed.

A replacement of the powertrain control module (PCM) requires the Ignition Switch to be turned off in order to protect the internal components. Check the pcm connector gaskets for proper installation because they are essential to blocking contaminants. Clean all debris from the pcm connector areas. The new pcm needs programming as a key step before installation. A compatible scan tool should be used to obtain and save the engine oil life percentage before programming because an unprogrammed value defaults to 100% which requires an oil change at 5000 km (3,000 mi) from the last service. As a first step disconnect the negative Battery Cable and also remove the engine harness clip from the pcm cover when the vehicle features the allison transmission regular production option (M74). After releasing the pcm cover mounting tabs you can take out the cover itself. The pcm electrical connector bolts need to be loosened while the ignition is off to prevent connector damage when connecting or disconnecting the pcm to its connector. You should disconnect pcm electrical connectors before you release the spring latch and mounting tabs to remove the pcm. When installing the new pcm users should secure its mounting tabs while tightening the spring latch at the same time followed by electrical connector connection before securing the bolts with a torque of 8 n.m (71 lb in). The installation requires reconnecting the negative Battery Cable and applying pcm programming when a new unit was installed.