GM 19300014
PCM

The first step to replace the Engine Control Module (ECM) requires turning off the ignition to avoid harm to system components. The scan tool will acquire and document information about the current engine oil life together with automatic transmission fluid life. The first step involves disconnecting the negative Battery Cable followed by removal of the engine wiring harness connectors from both middle and lower locations at the ecm. When dealing with the ecm bracket removal process you should detach the engine wiring harness clip from the ecm bracket tab. Disconnect the engine wiring harness upper electrical connector from ecm by keeping away from the connector pins to stop electrostatic discharge damage. Use your fingers to raise the retaining tab before extracting the ecm from its support brackets. The bracket may need removal when you remove both its bolts and hardware components. Position the ecm bracket properly and then secure the bolts with 6 nm torque until they reach 53 lb in. Insert the ecm onto bracket support tabs before snapping it beneath the retaining tab. Then reconnect the engine wiring harness upper electrical connector and replace the engine wiring harness clip if you changed the ecm bracket. Reconnect the Battery Cable after connecting both the middle and lower electrical connectors to the ecm. New ecms require programming through the reprogramming procedure to operate correctly.

Either replace the ECM or program the electrically erasable programmable read-only memory (EEPROM).

Avoid contact between the metal case of the control module and battery voltage, and do not touch the connector pins or soldered components to avoid electrostatic discharge.