Jimfred,
What year truck do you have?
Side door windlace should be the same on pick-up and suburban trucks (except, perhaps, for the color). By windlace, I am referring to the rubber seal that mounts inside the door frame of the cab and seals the door when it is closed - is this what you are referring to? There is also a rubber seal around the door itself and a lower windlace seal attached to the floor with a retainer.
There were at least 2 styles of windlace between 47-54. As I recall, the earlier type (47 to early 49) had screw-on windlace retainer(s) anfrom late 49 to early 55 there was a track welded to the inside edge of the door opening (the windlace slid into this track).
What year truck do you have?
Tim
