I am new to this old thread, and very confused...I have a 2004 Rainier and just purchased a INR NAV Head Unit (15204335) that I thought was going to work. I had the Dealer Reprogram my VIN and the Radio/XM, etc all appear to be receiving and processing data, but the problem is no sound. The sound is there if you get right next to the speaker, also no door chimes, which makes me believe there is some issue with the AMP. NAVigation works perfectly!
I have the UQA RPO code in the glove box with a 15103800 BOSE AMP. I have a RSA system as well.
Is there a way to make these two devices work in harmony? Is a re-wire the answer?
You bought yourself a Lux Head unit (rpo code y91) the only way to get it to work is a lux AMP and rewire the connections