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Re: GM Techs, Can Bus issues. HELP!
Posted to Technical Discussion Forum on 3/13/2020

Bypassed TCM connector first time I turned on the key ECM came back, after a few key cycles I lost the ECM and a few other modules on the bus, originally it has 14 modules when the ECM responds, when none responsive it has 13, this time once I only had 7 and a... Login to read more.