Alright, I just installed an Android radio in the Hoe and now I don't have audio. Truck is an 09 PPV Tahoe, I don't think it has an amp but I could be wrong. Anyone know what I'm missing? The radio came with a GM harness installed as it's marketed as a direct install. It came wired with a CANBUS module as well, CANBUS works, I get door open alerts, remote chime speaker works, just no audio from the radio over the factory speakers.