Identical issue here with my 2018 Suburban. Took around 15 visits to the dealer for them to finally solve the issue by replacing the antenna amplifier. Shortly after we had issues with the engine mounts and a leaking rear air shock. Had them replace the vehicle under the Lemon Law and opted for the same vehicle just the 2019 model. Guess what? Same exact key fob issue with this one as well. At least this time they knew what to do. They replaced the antenna amplifier last year and all was good...until yesterday. Got in the car and it wouldn't start...keyfob not found message on dash. Also passive locks wound't work again and remote range was about 20 feet from the vehicle (line of site). Called up dealer and made another appointment to have it replaced yet again...I can't imagine my luck is that bad and that many others out there aren't experiencing issues like this. It has to be more wide spread. I sure hope they figure out what is actually causing this. I ordered the BlueDriver and am going to give that a shot too just in case. At least I found others that are having the same issue this time. Two years ago when we were first experiencing this issue I couldn't find anything online regarding others having similar issues.
