I too had the Bose system in my GP. When I first got my new HU, I actually hooked it up to the Bose amp and ran new speakers off the factory speaker wiring. I would not recommend it for the long haul seeing that the Bose amp runs around 8ohms and most after market is geared between 4-1ohm ratings.

I had that setup for about 3 months before switching over to a 4ch amp for the cabin speakers and a mono amp for the sub in the trunk. The wiring is not to difficult really, just kind of labor intensive. But done right, you will be 10x happier with the sound in your GP for sure!

Mainly the things you have to do for running new wiring is ......

1. Run a 4ga or 1/0ga power wire from the battery through the firewall on the passanger side of the vehicle. There is a built in grommet from the factory wiring already so it's an easy place to gain access in to the car.



2. Not everyone does it, but should, at least remove the passanger seat run your RCAs and speaker wire up the middle of the car to trunk or wherever you have amps mounted.



3. You have to remove the rear seat, both top and bottom cushions to properly route your wiring to the trunk and to gain access to your rear deck speakers.



4. You have to remove your driver and passanger front door panels to gain access to your front speakers. And the bellow that connects between the car's main body and the door easily pops out to allow you to thread the wiring through into the cabin of the car.

5. You have to remove the plastic railing on the passanger side of the door sils to allow the running of the power wire back to the trunk of the car. 4ga fits nicely underneath it as does 1/0ga wiring without much issue.

6. Then you have to position your amps in your trunk for accessibility and yes looks too. I used MDF wood to create back panels I connected my amps to for a clean look. Some folks just tack their amps to their sub box as well.





That is the basically the simplest way to start to describe some of the steps that need to be done to complish your task. I did my all my rewiring, speaker replacement, amp setup and wiring in about 10 hours on a Sunday. It can take a lot less time, but I wanted things to be good the first time out, so I took my time and cut things to fit perfectly.

Its upto you on how creative you want to be with your new aftermarket stereo installation. Good Luck!