I have a 2015 Suburban Lt , I have replaced the Whole AC system, AC condenser, Compressor, expansion valve, Schrader valve, evaporator core, both upper and lower blendoor actuators and pressure switch, pulled several vacuums on it, but it will not take a charge, what could be the issue, thinking maybe a blockage somewhere?

 

I'm having the same issue. Was wondering if you ever got it resolved?