Here we have a used engine wiring harness removed from a 2013 gmc 2500hd. This should fit many 11-14 chev and gmc HD trucks with the LML 6.6 engine. This is the harness that site on top of the engine, not the one that runs down to the transmission. As shown in the photos it is in excellent condition and ready to use. Verify that its the exact part number you need. Sold as shown in the photos. Please email me if you have any questions.