I shot the above image from a video I watched recently about automotive electrical connectors. The author of the video indicated that this company can match you with a new connector using just a photo of the old one - or you can order one by providing other information.



I also saw another video that offers wiring harnesses for the 6.5 - like this one that can be found at the rear of the engine valley in a 1994 or newer electronic 6.5. That 15-pin plug can be affected by corrosion in those trucks driven north of the Mason/Dixon line during the winter. Not cheap though... This harness is currently priced at $214.
See: https://quadstartuning.com/collectio...nt=41414604242