I need to find out what car this ECM came from. The numbers on it were 16048241 and 1227169. One of them said "serv. no." in front of it but I forget which one. I think it is from an LG4 but not sure and have no idea what year. I need to know so I can choose which aftermarket or custom chip I will get. Thanks.
John

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84 Firebird with Trans am ground effects- 350 4bbl GM crate motor (LM1), T-Tops, automatic, K&N filter, 180* thermostat, ram-air hood scoop, flowmaster muffler, Accel cap & rotor, MSD Super Conductor Wires. Coming soon: new interior (grey), rear end work, subframe connectors, polyurethane bushings