Hello, i was wondering if it is possible (and how so) to swap the center locking locks from a sierra to a p100, thanks

 

you mean the central door locking. not quite as easy as it first looks. you would need to swop over the door looms but how much or how far the loom gets involved with the rest of it. i used std saff doors on mine that didnt have central door locking i got everything mounted some holes wernt there the inprints were. not sure if the door loom unplugs mine does but my loom was made for c/l. you would have to compare both vehicles and go from there

 

Get an auto sparkie on the case see if it can be done