So I am wanting to add an amp and sub to my 03 envoy with the bose head unit/speakers. I'm not replacing the head unit or speakers, just adding an amp and a 12" sub. I already have the LOC but CANNOT for the life of me find a wiring diagram that matches the wires coming off the bose amp. I see a lot about '05 and newer wiring diagrams but the ones I find for '03's never matches.... Does anyone have a legit wiring diagram for the bose harness that I need to tap into? Also, what is the best method for the amp turn on wire? I do not have the pink wire that everyone refers to. I am about to just install a switch at the dash to turn the amp off and on unless someone has a better idea.

 

Hi Paul,
I'm working on the very same thing right now. 03 trailblazer with the same bose amp and system. Did you ever find a wiring diagram and figure it out?

 

Hey Paul I have an 03 trailblazer with the same bose amp and the same problem. Did you ever find a wiring diagram and get it all hooked up? If so can you please post or email me that? Thanks.