I've just installed a Evo All and RFK 942 on my 2015 GMC Sierra. No issues at all during install or programming and the system is working (sort of). The problem I'm having is this: intermittently the unit does not seem to receive commands from the remotes and/or no confirmation is sent back to the remotes. About 1/2 the time when pressing a button on the remote, I get the multiple blue LED flashes followed by the red LED and the beep indicating out of range. Or the vehicle responds but the key fob does not confirm it (no beeps or LED flashes on the key fob). It happens with both key fobs and distance from the vehicle does not matter. I can be 6 feet from the truck or 200 feet - same result (I haven't tried from any further away yet). I was thinking maybe there's an issue with the antenna and then I realized that the antenna firmware can be updated. I connected the antenna to the Flashlink 4 and it does not detect it. Does this confirm that the antenna is bad? Or am I doing something wrong?
Just for context, I'm a professional Automotive Technician at a GM dealership and have some experience installing remote start systems. This is the first Fortin system that I've worked with.
Edit: I tried again and managed to connect the Flashlink to the antenna. The antenna firmware is already up to date.