For my 13 Z71 I ordered the simplesoft E8059CHEVY OEM replacement in dash DVD nav for only $599 delivered. Anyone else have one or get one that low? It has good reviews online. I'm good with hooking electronics but worried about breaking the trim around the radio. Do I need a special tool or can I use a putty knife or something to pry the trim? I'm also wondering what to do with the gps antennae it comes with or if factory wiring has one even though it didn;t come with nav. I think the thing on the roof is only for XM? I might bring to store for hookup but it seems easy enough.