GM OEM Ignition System-ECM PCM ECU Engine Control Module Computer 12687296. #6 on Diagram Only-Genuine OE Factory Original Item. Brand: GM OEM Part Number: 12687296 Item Description: Ecm Quantity Needed: 1 Item Specifics. ONLY PART REFERENCE #6 ON THE DIAGRAM IS INCLUDED.See Item Specifics section for additional specifications about this part. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table. Also review the notes section in the compatibility chart for additional specifications about this part. The engine types may include 3.6L 222Cu. V6 GAS DOHC Naturally Aspirated, 3.6L 3564CC 217Cu. V6 GAS DOHC Naturally Aspirated, 6.2L 6162CC 376Cu. V8 GAS OHV Naturally Aspirated, 6.2L 6162CC 376Cu. This part fits vehicles made in the following years 2016,2017,2018,2019,2020,2021. This item may have been superseded from a different part number from this manufacture. Brand: GM OEM Part Numbers: 12679078, 12683348, 12708794, 12725663. Parts are shown individually with their own Ref #, while sub-assemblies may show multiple parts within a square or circle in the diagram with its own corresponding Ref #. Note: Sometimes the same Reference number can appear multiple times on one diagram. Typically only ONE part from ONE of the callouts will be included.