I'm looking for help with my 2012 Acadia with sporadic electrical issues. I have had codes p0575- cruise control input circuit, p0700- Transmission control system malfunction, u0073-Control Module Communication Bus 'A' Off, u0109-fuel Pump Control Module (FPCM), u0101-lost communication with tcm. The DIC reads service All Wheel Drive, Traction control, stabilitrak, and park assist off. The truck goes into limp mode and all gauges except voltmeter drop to zero and go back up repeatedly. Lift gate and A/C also intermittently work during these conditions. Any help would be appreciated!