I have a 2015 Tahoe LTZ. I have the same GPS failure that has been discussed in a different thread. However at the same time I lost the GPS, I also lost the ability to use the voice recognition for hands free calling. From what I can tell the system simply cannot hear my voice commands. It seems that the two problems are somehow related as I noticed them at the same time. Anyone else have a similar issue? Very frustrating considering I use the hands free phone feature frequently