Yep, I did some checking before I bought mine and it seems everyones covered the ones I could find:
- differences: different steering wheel
different dash treatment (Laramie only)
- advantages: rear headrests
I also heard about the block heater being optional on the '04's and that the Garnet Red was discontinued for '04.
I'd be interested if anyone has anything else to add. I didn't hear about the ECM thing, but if it only effects the 48re, then it wouldn't matter to me as I was only interested in the 6 spd, this time around.
Cheers,
Dave