Maxx Power

I have a 2005 Chevrolet Malibu MAXX LS and I would like to use my MP3 player in the car. I have never been satisfied with FM transmitters. I noticed that a bunch of the newer GM cars have a radio with an auxiliary in port on the front that would allow me to plug in my mp3 player and not have to deal with the lousy FM quality sound. I'm wondering if I were to buy the radio from something like an 06' Impala or 07' Tahoe if I'd be able to have it installed in my car and have everything work. As you all know, the radio in the Malibu handles a lot of the car's readouts, such as oil life, gas mileage and so forth. I want to make sure I don't lose those. I compared pictures and they appear to be the same size and have similar mountings. Normally I'd ask the dealer, but the last time I went there, they told me my car didn't have keyless entry and the remote I was buying wouldn't work. I told them to try programming it anyways, and sure enough it worked.