Review on Maestro GM5 T-Harness with Speaker - Easy Plug and Play Solution for GM5 Vehicles by Steven Brouillard

Just installed this on my 2012 Sierra. I would recommend to keep shopping, just get a Crutchfield kit or something. The installation of this Maestro was pure madness. A clunky interface to "flash" a device from your home computer and this can only be done in Internet Explorer lol. Also terrible instructions. This kit comes with all sorts of extra wires, connectors and harnesses that you don't need. The problem is that the instructions are very unclear about what you need and what you don't need. As a result, there were half a dozen extra seat belts. It's been a whole day and I've been searching the internet for answers. Find something easier to use!