[racoon]

2001 front seat parts diagram:

https://dz310nzuyimx0.cloudfront.net/strapr1/df9fa45ffd329bfcc421c1e2e172ed27/3c5fafddf924e4a380fd5d8e674c5f8b.gif

#29 - Screw, Flat (4x16)
#8 - Guide, Headrest

Rear seats:

https://dz310nzuyimx0.cloudfront.net/strapr1/c028e5f1c5ea2c0d7bed8acfdd12c4ec/1fb109d673a2d68bce6c27f4472662dd.gif

41 and 5 have the same descriptions as the front seat parts.

 

[racoon]

I'd start with removing the headrests, then remove the screws, and then see if they will pull out.