PA questions

[PA93]

Hello !
I wonder what with auto door lock feature (when you shift from park) if you have accident and doors are locked.Afaik some cars have sensors (?) that unlock the doors after crash - does PA have it?

Does PA have serial bus?I know that LeSabre 2000- has sb type 2 (or something like that) - what with PA (mid 90)?Just wires or maybe something more advanced?

What's the difference between GM C chassis (PA) and H (LeSabre)?

What's the difference between PA (pre 1997) and LeSabre 1996-1999 - I mean LS limited?Any unavailable option?I think that LeSabre Limited was perfect car for people who prefered shape and equipment of pre 1997 PA and didn't want to buy PA after 1997 changes. What do you think?For me PA and LS Limited are just twins