Here we have a good used chassis wiring harness removed from a 2015 gmc 3500hd. This should fit many 11-16 chev and gmc HD trucks with the crew cab and long box. This is the harness that goes from the fuse box all the way to the back bumper. As shown in the photos it is in excellent condition and ready to install. Verify that its the exact part number you need. Sold as shown in the photos. Please email me if you have any questions.