I know for certain that there are no inputs that would be directly adjustable with a potentiometer on the Cobalt SS EPAS system. I am uncertain at this point whether the CAN bus input is just a Speed message and the EPAS does the assist calculation itself or if there is a requested assist message and the ECU does the thinking. The only way to use a potentiometer would be to have a microprocessor built in that converted the potentiometer input to a CAN message.
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