This DEF harness plug kit, part number GMDEF, is a perfect fit for 2011 - 2016 GMC and Chevrolet vehicles with 6.6L Duramax engines. It comes with harness caps that effectively keep water, dirt, and debris out of the vehicle harness for the DEF tank. This helps protect your truck's harness and keeps it in good condition.

Using this DEF harness plug is easy. Just find the vehicle harness for the DEF tank and insert the plug. Make sure it fits snugly. As for maintenance, it's a good idea to check the plug regularly for any signs of damage or debris buildup. If you notice any cracks or if it's not fitting well, it's time to replace it. Also, keep it clean. When removing the plug, do it gently to avoid any damage to the harness or the plug itself. This way, you can ensure your truck's harness stays protected and your vehicle runs smoothly.