This is a heavy - duty, high - flow and flexible transmission cooler line set designed for 2015 - 2016 GM 2500/3500 trucks with LML 6.6L Duramax engines. It's the most complete replacement kit for your LML truck. These lines have a larger diameter (5/8' hose) than the stock ones, and come with an explosion - proof polyester hose protection sleeve. They can increase overall flow and prevent future failures. The kit includes (3) 5/8' ID transmission lines with AN fittings, (6) 7/8' - 14 O - ring to - 10AN fittings, (2) large OD washers, double hose clamps, locking cable ties and fir tree cable clamps. Note that it's not for use on Cab and Chassis applications. It comes with a 1 - year parts - only warranty. Click for installation details.

Using this transmission cooler line set is quite easy. First, make sure your truck is turned off and cooled down. Replace the old, leaking transmission lines with the ones in this kit. The fittings are designed to fit your 2015 - 2016 GM 2500/3500 with LML 6.6L Duramax engine. Just connect them according to the included parts. Remember, this set is not for Cab and Chassis applications, so don't try to use it on those. For maintenance, regularly check the hoses and fittings for any signs of wear or damage. The explosion - proof polyester hose protection sleeve helps keep the hoses safe, but still, a quick look every now and then is a good idea. If you notice any issues, reach out for the 1 - year parts - only warranty. That way, you can keep your truck's transmission running smoothly.