i am not sure how this is done on the gp, i have never done them on one. i did do them on my blazer, and i had to get a spring compressor deal, then i knocked both of the old pins out, and had the door sitting on an old milk crate with me holding it.. then picked the door back up and held it in place while a buddy put the new pins in.. probably an easier way, but FWIW its a start