Peculiar Locosys LS20031 Problem

Hi everyone, happy 4th! Im having an interesting little problem with my locosys LS20032 unit. Whenever I connect it with the GPS’s TX pin left open or high , It turns on normal and begins to flash its led once it gets a lock. When I connect it with the TX pin tied to ground, the led turns on, and stays on and doesnt output any NMEA sentances. I tried making my MCU put it’s RX pin high when it starts up, but it didnt help. Has anyone had this problem before? Any ideas? Thanks!