Hi my hummer has orginal codes: UB1 radio unit and UQ7 analog bose amp....
I try to put new head unit in with this wiring harness:
https://www.bassjunkies.com/ctshu001-2.html

Everything else is working, but no sound. When i put orginal head unit back then i have sound. So amp is working....

Can you help me? How i get sound or is my wiring harness wrong?

 

check connections or ask the maker of the harness, should have purchased metra since they have great customer service

 

I used the PAC RP5 -GM11 Wiring interface, I have the same Bose system, everything is working great, I bought it from Crutchfield and had them do all the connections for the radio for extra 20 bucks. My install was plug and play