This high - quality aftermarket Fleece Performance transmission cooler line kit (FPE - TL - LBZ - LMM) is a perfect fit for 2006 - 2010 GMC 2500/3500 with 6.6L Duramax engines. The Alisson Six - speed transmission is a tough workhorse, but leaking transmission lines can lead to fluid loss and potential transmission damage. These heavy - duty, high - flow lines come as a complete kit with fittings. They ensure long - term reliability, repair any leaks, and give you miles of trouble - free driving. Part Number: FPE - TL - LBZ - LMM. Click here for installation instructions.

Using these transmission cooler lines is simple. First, make sure your vehicle is turned off and cooled down. Remove the old, leaking lines carefully. Then, install the new lines from the Fleece Performance kit following the included instructions. Make sure all fittings are tightened properly to prevent any future leaks. When it comes to maintenance, regularly check the lines for any signs of damage or leaks. If you notice any issues, address them right away. Also, keep an eye on your transmission fluid level. These lines are built for long - term reliability, but taking these simple steps will help them serve you well for years to come.