I currently have a PAC audio aux installed on my stock HU. I have my MP3 player hooked up. Works great. I'm looking at Garmin GPS. I see it has a built in MP3 player. Would I be able to mount it & connect the mp3 jack to use it like an MP3 player? Also does anyone have the Garmin 750 or 850 mounted in the top cubby? Does it fit/close?

 

if it has 3.5 mm audio jack

 

these two GPS also have a FM transmitter so it could work like that two but not sure about quailty.