2004 Pontiac Grand Prix Radio is bad bad

Just bought a 2004 Pontiac Grand Prix and if I could change one thing...it would be the lousy stereo! I guess I should opted for the Monsoon or Bose. I think too it's the speaker placement. Don't get me the wrong, the Bass response is ok but the Mids and Treble sound like their in a bathroom. Very hollow and muffeld sounding. Does anyone have any quick fix or suggestions for this problem. Id rather not replace the head unit since I leased the vehicle. Maybe replacing the tweeters in the door would be a simple fix?? Adding a small 4 channel amp with some crossovers to the factory speakers? Maybe snipping the wires to the tweeters in the doors (were your legs totally cover the speakers) and mounting some aftermarket tweeters to the A Pillars?? Any suggestions would be greatly appreciated.

Thanks in advance.

-Jeff_rdk

Replace your HU for start.  It will make a big difference.

If I replace the head unit..is there an adaptor to retain the steering wheel controls?

Would a small EQ make any difference? and if so..what would one recommend. Remember...it would be hooked up to a factory HU. Would I need an adaptor for the hign pass. freq? O know this sounds ghetto..but since the car is a lease, I just want to get some more treble and mids. Open up the sound a little..im not looking for perfection..just something a little better then what it is.

Thanks

It is alot more difficult to replace a head unit in a new gm vehicle. The HU is controled by the BCM and removal of the head unit may cause adverse affects such as loss of door chimes, and on star capabilities which use the stock HU. People say that other features controled through the bcm are also affected (i.e. remote entry, airbags etc...) On my 2002 sunfire only the chimes were effected, but my computer system is much more simple than a grand prix. Also there is no access. power wire for the stock HU (powered by the data link connetion wire) and a suitable wire will have to be found to turn on a aftermarket deck. I have also been told that it could trigger a SES light.

the best solution is a 4 channel amp with new speakers. To my knowlegde the factory speakers have a amp with a built in crossover for each channel/speaker. You cannot amp the stock speakers because the fronts are components and the crossover is in the amp.

Sorry if the link to the rear speakers dosn't work. Here it is: http://www.crutchfield.com/S-fW1Ym5BiPyg/cgi-bin/ProdView.asp?s=0&c=10&g=52300&I=500SPS690A&o=p&a=0&cc=01&avf=N&search=

I would also use this amp instead: http://www.crutchfield.com/S-fW1Ym5BiPyg/cgi-bin/ProdView.asp?s=0&c=3&g=120&I=500MRPF240&o=p&a=0&cc=01&avf=N&search=