I've installed many different radios in various vehicles but never a GP anway i went to walmart to get the dash kit and harness well i started by looking for the dash kit first there was 3 2 of them said for gm vehicles and listed for grand prixs from 94-99 the other one was the one with the door chime feature box where when u shut car off it still plays radio until you open the door but that kit said it was only for 2004 grand prixs, so my ? is what do i do i have an 01 grand prix isnt the dash the same as a 99? so would that kit work or do i go with the one thats for the 04s becaus i have the door chime feature? any help would be much appreciated