GM 12629278
ECM

Start by turning off the ignition before handling connectors and power disconnection since it protects the Engine Control Module (ECM) from internal damage. Prevent the engagement of battery voltage with the metal case of the control module to protect it from damage while refraining from handling both connector pins and soldered components to evade electrostatic discharge. Thoroughly clean the control module connector surfaces before inspecting gaskets which must be correctly installed to stop pollution from entering the system. The replacement process requires scanning tools to retrieve information about engine oil life. When the replacement method is not programmed the tool will set residual oil life at 100 percent leading to an unnecessary oil change after 5,000 km (3,000 mi). Disconnect the battery negative cable while you disengage both upper and lower electrical connector retainers from the ecm before removing it. To install the product position the bottom ecm tabs into the bracket then push the ecm into its place while securing both upper and lower electrical connector retainers. Complete the installation by reattaching the negative Battery Cable while performing ecm programming if you put in a recently acquired ecm.

The service of Engine Control Module (ECM) requires either a new ecm installation or eeprom programming. Verifying that the replacement ecm serves as the correct component is necessary before unhooking the damaged ecm for new service ecm installation. Warning: turn the ignition off before dealing with control module connectors because it helps defend against internal damage to the components. The metal case of control modules should stay away from battery voltage while keeping your fingers off both pins and solder joints to block electrostatic discharge. Check the control module connector surfaces for debris before inspecting gaskets to ensure proper installation and contamination prevention. The new control module requires programming and a recording of engine oil life must happen because failure to do so will set engine oil life to 100 percent which forces an oil change at 5000 km (3000 mi) from last maintenance. The process starts with scanning the tool to measure engine oil life percentage then remove the negative battery terminal. Remove the ecm connectors by disconnecting their retainers from the engine wiring harness electrical connector. Workers need to detach the bracket retainer tabs that lock the ecm to the bracket in order to pull the ecm free from the bracket. To set up the ecm installation begin by slotting the bottom part into the ecm bracket tab then push the device firmly to fasten it before connecting the retainers on the engine wiring harness electrical connectors. When completed connect the negative Battery Cable while performing an ecm program if the system added a new ecm.

The first step when replacing an Engine Control Module should be turning off ignition to protect the module from internal damage during connector installation or removal and power disconnection procedures. The metal control module frame should not receive battery voltage to protect its operation and touching connector pins or solder connections is unsafe because it generates electrostatic discharge. Check the connector surfaces for debris before checking if the gaskets are correctly installed to stop contaminant penetration. A scan tool should be used to record the remaining engine oil life data because lack of programming will cause the new module to default to 100% leading to an oil change at 5,000 km (3,000 mi) based on the last change. Proceed with disabling the negative Battery Cable and releasing the ecm electrical connector retainers before pulling out the connectors from the ecm position. The installation requires removal of the ecm after detaching its retainer tabs which secure the ecm against the bracket. The installation process of this unit requires users to first insert the bottom ecm tabs into the bracket before pushing the ecm unit to lock it in place with retainer clips applied to both the upper and lower electrical connectors. Ending the procedure requires reattaching the negative Battery Cable and performing an ecm programming step for any newly installed unit.