eokafor23

I know that this topic is a one that has been touched on already in this forum and I've looked through several threads but couldn't find a definitive answer so does anyone know the cheapest way to go about adding navigation on the gs 300 system that does haven't it, while still keeping the Bluetooth features and everything else and? I've heard of something called Vaistech SL2Vi and other aftermarket systems and would be interested in those too.