This performance silicone coolant hose is a must - have for 2007.5 - 2010 GM vehicles with LMM, 6.6L Duramax engines. Engineered for a perfect factory fit, it's an excellent upgrade when your old coolant hoses are worn out. Made of durable 5mm thick silicone with 1 - ply heat - resistant internal fibers, it ensures long - lasting performance. The outer diameter is 24mm (15/16”). For the best installation, pair it with the PPE hose clamp P/N 515005100. The part number is 119021010, and its GM equivalent P/N is 98004176. Remember to use it with the 119020009 1999 - 2016 GM Stainless Steel Heater Hose Connector.

Using this coolant hose is simple. First, make sure your engine is cool. Then, remove the old coolant hose from your 2007.5 - 2010 GM vehicle with LMM, 6.6L Duramax engine. Install the new hose in place and secure it with the recommended PPE hose clamp P/N 515005100. Always use it together with the 119020009 1999 - 2016 GM Stainless Steel Heater Hose Connector. For maintenance, regularly check the hose for any signs of wear, like cracks or leaks. If you notice any issues, replace the hose right away to keep your engine running smoothly.