Replacing radio in 00-05 car with amp in trunk

[GerGa]

Hi,
I am looking to replace the radio in my H-body(04 buick lesabre with concert sound ii). I just realized it has an amp in the trunk. Being stock, should I assume that amp sounds pretty poor? So just replacing the head unit is not that great?
I was thinking of either running the speakers directly off the headunit, or getting a new amp with it. The first option would require re-wiring I assume. Rewiring might be a good idea with a new amp anyways.
Any advice is appreciated. I never rewired speakers before either.

I know there are people out there that did this on their 00-05 Bonneville. Basically same car.

Thanks

[nos4blood70]

You can add a aftermarket radio while keeping the stock amp, it will still improve sound. Just requires a special adapter harness.

Alternatively, a new amp will require running some new wiring around. Definitely worth it, especially if you can do it yourself. Not difficult by any means, just time consuming.

[GerGa]

As it turns out, Lesabres with Concert Sound II did not come with an amp. I thought it did but none in my car. I am just going to replace the Headunit for now but might look into running the wires back to the trunk for a future amp since I have no idea how it's done.

[nos4blood70]

It's very simple, much easier than most cars, particularly since the battery is under the back seat cushion.