Would a 2005 seat fit on a 2003 LT I know someone can tell me
I have the same problem. Haven't modified anything yet as I'm planning on having the original seat recovered and either sell the replacement, or hang on to it in case I need it.I believe early seats all fit later models, I fit a 2004 seat on my 02 and had to grind down the lip on the side panels under the seat so it would clear, yes it will fit, the only problem you will face is possibly grinding off the panels.
a quick search using the search function and this early post came up which does answer your question. here ya go have a read through this.