I did an XM Satellite radio add-on unit hardwired for it...
After the key was in ACC for 30minutes... the battery died. There wasn't enough room behind the radio, since it was an 01 there wasn't an turn on wire behind the radio.
I charged the battery a little, turned it on... and the fuel gauge wasn't working... and all the information center stuff didn't work... and the ABS, Airbag, and Batt light were on.
The rear seat sucks to get out and get back on right... and I have to disconnect the batt negative to reset the computer.
Oh well. I guess it wasn't that bad... just a bunch of little things...
nG