molderone

Recently acquired 2014 Sierra. First issue I am working on is no blower for either AC or heat. I can hear ducts switching, lights for function properly. I have been told the previous owner attempted to fix, replaced blower motor assembly and climate control panel. There is power going to blower. I have also read there Service Bulleting out pertaining to this issue but I would like to confirm the software update is indeed what is needed. Anyone else have this problem