mwh

I have a 2015 silverado 1500 4x4 6.2l tire pressure light came on both front tires didn't read NY pressure only the rear, rotated tires and it moved to rear so replaced all 4 monitors thinking that was problem. Tire light came back on talk to GM mechanic said to replace remote controlled door lock module. Replaced module and both front tire pressure are not reading only the rear tires sometimes its only the passenger side tire monitor that won't read.dont know what to look for now any help?