I saw some people mention this part number Dorman 42631 as a possible replacement wiper arm for squarebody trucks so I found a local parts store that had some in stock to compare and they looked close enough in the store so i grabbed two I think the part number is for a left wiper arm they fit pretty good and allow you to use more widely available wiper blades the Dorman arms are slightly longer I still used a 16” blades but I don’t have to worry about them popping off the old post style #squrebody #gmc #c10 #wiperarms #wipers #GM #windshiled