I have a 2014 silverado LT. The child lock blinks when the truck is switched on and the rear driver door will not open from the inside. I switched the truck on and pressed the child lock button and it quit blinking, allowing me to open from inside. Then I pressed the button again and it won’t allow me to open from the inside and it’s back to blinking. I have pulled the door panel, fuses, scanned for any codes and everything checks out. I am absolutely stumped and I really don’t want to take it to the dealer. Can anyone help me please?