avic z120bt should i or not

RonRizz

you need a seperate tuner for your sattelite radio to function, and a seperate tuner for your hd radio to function as well. Hd tuner will work off your factory antenna, sattelite tuner will have its own antenna.
you will need an antenna adaptor, wiring harness, and a steering wheel control adaptor. I don't believe you need the dash kit, bit I can't say with 100% certainty. That bit of research you need to do on your own, as there is some controversy whether you need it or not.

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