GMC window knob replacement

thingiverse

My work truck is a reliable 2012 GMC 3500 with an attached 12-foot box. The window crank mechanism on these vehicles has a subpar design and materials, so I decided to take matters into my own hands and fix it without relying on GM. The printed knob is a single piece that utilizes a captive nut system. I designed it to be print-ready without any supports. To assemble the part, simply print the knob face down (design side facing up), pause the print after printing the 11mm layer, insert the nut with the nylon side facing down, and resume printing. To complete the project, you'll need a few additional hardware components: - A 5/16-inch by 1.25-inch bolt with coarse threads and 18 TPI - A 5/16-inch flat washer - A 5/16-inch nylon lock nut with coarse threads and 18 TPI I've successfully used this printed knob as a replacement in my own 2012 GMC truck and a colleague's 2006 GMC. If you have any experience with similar vehicles, please leave a comment to confirm or refute the compatibility of this design for GMC/Chevy vans and trucks from 2003-2018.