GM 12602801
ECM

The service of powertrain control module (PCM) requires either pcm replacement or eeprom programming. You should use the accurate part for replacement which will require you to remove the damaged pcm before installing the new service pcm. The prevention of pcm internal damage requires the ignition switch to remain off during power connections and disconnects to the pcm, in addition to clearing all debris from around the pcm connectors. The pcm module connector gasket installation should be checked to avoid unwanted contaminant intrusion. After installation the new pcm needs to undergo programming procedures. A scan tool should be used first to obtain and document the current engine oil life percentage because absence of this data in the new module replacement will automatically reset the oil meter to 100% and trigger an oil change at 5000 km (3,000 mi). First disconnect the negative Battery Cable then free the mounting tabs of the pcm cover before taking out the pcm cover. Disconnect the pcm electrical connector bolts while maintaining the off state of ignition to avoid harming internal components. Escort the pcm electrical connectors from the system then disengage both spring latch and mounting tabs before extracting the pcm from its position. The new pcm installation requires users to connect its electrical connectors while aligning the mounting tabs to engage the spring latch. The pcm electrical connector bolts should be tighted to 8 n.m (71 lb in) while installing the pcm cover with proper engagement of mounting tabs followed by negative Battery Cable connection and pcm programming when installing a new pcm.

Decisions regarding powertrain control module (PCM) service include replacing the pcm itself or executing electrically erasable programmable read-only memory (EEPROM) programming. Inspection of the pcm should occur before replacement to verify that a correct part is chosen. The operation of disconnecting power and removing or installing pcm connectors must be performed only when the ignition is off to protect the pcm's internal components. Surface inspection of pcm connectors must be followed by cleaning all debris while double-checking the presence of appropriate pcm module connector gaskets which act to stop contamination. First disconnect the negative Battery Cable before relocating the pcm retention bar along with its retainer to free the pcm from its mounting bracket and then disconnect the electrical connectors. Begin the installation by checking the service number on the replacement pcm matches the defective unit in order to proceed with replacement. Complete the electrical connector attachment by securing screws to 8 n.m (71 lb in) before placing the pcm retainer into bracket slots. After pulling out the retention bar install the negative Battery Cable. Programming the pcm should be performed at the end of the installation.

The service of the powertrain control module (PCM) requires an option of either replacing the pcm or programming the electrically erasable programmable read-only memory (EEPROM). Prior to pcm exchange check that the proper service component is obtained before extracting the old unit with its replacement. Before working with control module connectors and disconnecting power the ignition should remain switched off to protect module components from damage. Always use great caution when controlling the metal case of control modules at battery voltage because this can generate serious harm to the system. Protect against electrical damage by refraining from touching pcm pins as well as soldered components on the circuit board and by inspecting that connector surfaces remain free of debris. In order to stop contaminants from entering the system properly install the control module connector gaskets. The replacement control module requires programming while recording the engine oil life because a lack of proper recording will force the default to 100 percent which requires an oil change at 5000 km (3000 Mi) from the previous change. Start the removal process by using a scan tool to get the current percentage of engine oil life and to record this value before disconnecting the negative Battery Cable. The mounting tabs on the pcm cover need release before removing the cover and performing bolt loosening on the pcm electrical connector when the ignition stays off. The first step to replacing the pcm is separating the electrical connectors followed by unfastening the spring latch and mounting tabs to extract the pcm. Secure the spring latch of the new pcm by fitting its mounting tabs before connecting electrical connectors which should be torqued to 8 n.m (71 lb in). Installation of the pcm cover must occur after both the mounting tabs are correctly positioned and new pcm programming when required.

You need to use a scan tool to get the percentage of engine oil life before starting the pcm replacement process. First disconnect the negative Battery Cable followed by removal of the harness ground clip from the pcm cover when nys is present as a regular production option. The removal of the hybrid control module (HCM) must happen for vehicles that have rpo hp2 in their specifications. The release of pcm cover mounting tabs enables the removal of the pcm cover. The procedure to disconnect pcm electrical connectors requires loosening connector bolts only after switching the ignition off to avoid electrical connector damage. Free the spring latch and mounting tabs attached to the pcm and proceed to take the pcm out. The installation process requires you to fit the pcm mounting tabs before securing the spring latch followed by connecting all pcm electrical connectors. Secure the pcm electrical connector bolts with appropriate torque of 8 n.m (71 lb in). As part of using rpo hp2 install both the pcm cover followed by the hcm. Rpo nys requirements demand installation of the harness ground clip on the pcm cover. After negative Battery Cable reattachment proceed with pcm programming to prevent 100 percent engine oil life activation therefore requiring an oil change at 5000 km (3,000 mi) from the last change.

The service of the powertrain control module (PCM) requires an option of either replacing the pcm or programming the electrically erasable programmable read-only memory (EEPROM). Prior to pcm exchange check that the proper service component is obtained before extracting the old unit with its replacement. Before working with control module connectors and disconnecting power the ignition should remain switched off to protect module components from damage. Always use great caution when controlling the metal case of control modules at battery voltage because this can generate serious harm to the system. Protect against electrical damage by refraining from touching pcm pins as well as soldered components on the circuit board and by inspecting that connector surfaces remain free of debris. In order to stop contaminants from entering the system properly install the control module connector gaskets. The replacement control module requires programming while recording the engine oil life because a lack of proper recording will force the default to 100 percent which requires an oil change at 5000 km (3000 Mi) from the previous change. Start the removal process by using a scan tool to get the current percentage of engine oil life and to record this value before disconnecting the negative Battery Cable. The mounting tabs on the pcm cover need release before removing the cover and performing bolt loosening on the pcm electrical connector when the ignition stays off. The first step to replacing the pcm is separating the electrical connectors followed by unfastening the spring latch and mounting tabs to extract the pcm. Secure the spring latch of the new pcm by fitting its mounting tabs before connecting electrical connectors which should be torqued to 8 n.m (71 lb in). Installation of the pcm cover must occur after both the mounting tabs are correctly positioned and new pcm programming when required.

The service procedure for the pcm control involves replacing the component or executing eeprom operations. When it becomes necessary to replace the pcm always select the appropriate part before uninstalling the faulty module to install a new service pcm. Internal pcm damage will happen when turning off the ignition switch before connecting or disconnecting power to the pcm and clear all debris from the pcm connector surfaces. Maintaining proper connection of pcm module connector gaskets will help stop contaminants from entering the system. Use a scan tool to obtain the engine oil life percentage before removal because a failure to program the new module with this data through default mode will activate a 100% oil life condition which triggers a required oil change at 5000 km (3,000 mi) from the last change. Before work begins disconnect the negative Battery Cable except when using rpo nys which requires removal of the harness ground clip while rpo hp2 demands the removal of the hybrid control module (HCM). Vehicles without rpo hp2 need to start with unhooking the pcm cover mounting tabs before separating the cover from its bracket while removing the cover. Users should perform the identical cover removal steps for vehicles that have rpo hp2 specification. The process starts by removing the pcm electrical connector bolts when the ignition is off to avoid damage followed by disconnecting pcm electrical connectors and releasing the spring latch before extracting the pcm through the mounting tabs. Safely mount the new pcm through its tabs before locking the spring mechanism while connecting electrical cables by tightening the bolts to 8 n.m (71 lb in). Install the pcm cover after which installing the hcm if the vehicle includes rpo hp2. The negative Battery Cable needs to be reconnected after which pcm programming should be performed in case of new unit installation.

Replacing or programming the Engine Control Module's (ECM) electrically erasable programmable read-only memory (EEPROM) will service the system. Make sure to acquire a genuine ecm part before taking out the damaged module and swapping it with the new service ecm. Power loss from the ignition along with handling of control module connectors must always remain off because this keeps internal damage from occurring. The metal case of the control module must not touch battery voltage since this could harm the control module. Maintain safety against electrostatic discharge through avoiding touch of pins and circuit board components on the board and clearing contamination from connector surfaces. Regular checks of control module connector gaskets should focus on their proper installation to block contaminant entry. The new control module programming process includes tracking the engine oil lifetime percentage correctly because disregarding this step sets oil change requirements to 5,000 km (3,000 mi) following the previous change. The first step for removal involves using a scan tool to obtain and document engine oil life percentage before disconnecting the negative Battery Cable. Start by removing the ecm connectors through disconnecting their upper and lower electrical connector retainers then disconnecting the ecm from its bracket by releasing the retainer tabs. To install the bottom ecm tabs mount into the bracket before pushing the ecm until it locks into place. Fasten the lower electrical connector with its retainer before setting the upper electrical connection in place with its intended retainer. Reinstall the negative Battery Cable. Installation of a new ecm requires proper ecm programming before implementation.

Ensure the ignition is turned off to prevent damage to components.

Disconnect the battery negative cable, then remove the ECM fuse, TCM/IPC fuse, and ECM/TCM fuse from the underhood fuse block.

Disconnect the PCM harness connectors, ensuring the ignition is OFF to avoid internal damage.

Remove the faulty PCM and install the new service PCM.

Use a scan tool to retrieve and record the percentage of remaining engine oil life, then disconnect the negative battery cable.

Remove the hybrid control module (HCM).

Ensure the correct part is being used before removal.

Ensure the ignition is OFF when disconnecting or reconnecting the PCM connector to prevent damage.

Release the spring latch and lift the PCM from the mounting tray, then remove it from the engine compartment.

Disconnect the PCM electrical connectors, release the spring latch and mounting tabs, and remove the PCM.

Always turn the ignition OFF when handling PCM connectors and disconnecting or reconnecting power to prevent internal damage.