2003 Envoy Nav Upgrade

I have a 2003 Envoy SLT with Bose and Onstar. No XM radio.

I just bought the following on Ebay last night.

GM Factory Navigation Part # 15204335
Map disk version 2.0 part # 15105609
Antenna GM Part # 15135178

While I'm waiting for this to arrive I was wondering if I will need any other parts to complete this system. I've heard about a few people having sound problems after install. Or is a trip to the dealer for a vin reprogram all I need to do. If worse comes to worse I'm sure I could resell the parts on Ebay.

I was wondering how your install went. I too am considering adding the NAV unit to my 04 Envoy and I am wondering if I will need a different amp. I have the Bose 6 disc changer currently.

Install went great. Didn't have to change amp on my car. It just worked. All I had to do was have dealer remove theft lock. Before I went to dealer I hooked it up using the theft lock bypass method. This let me know if my current amp was good or not.

You guys suck. My '02 cant be upgraded due to the data bus. Im jealous :)

You guys suck. My '02 cant be upgraded due to the data bus. Im jealous :)
Yeah that sucks.

However!!! it does depend on when during the year your voy was made though. U may want to check into that.