HSP Diesel

HSP Factory Replacement Coolant Tank 2007.5-2010 Duramax

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  • Regular price $403.75
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This product may have a lead time, please confirm with sales@dieselpartdeals.com if in a rush

The 427-HSP or best known as the HSP Factory Replacement Coolant tank for the 2007.5-2010 LMM Duramax equipped Chevrolet and GMC trucks. The HSP Factory Replacement Coolant tank is one of those special parts that look great and function just like the factory part.

Why Would you need the HSP Factory Replacement Coolant tank for the LMM Duramax?

The factory coolant tank in the LMM Duramax is not the best-looking part under the hood. The issue is that it does work but it fails often and when it does there is nothing you can do about it other than replace it. The factory coolant tank often cracks, or fittings break and you are unable to repair either of those things. Being made out of plastic the factory coolant tank also often gets yellowed and dirty quickly and is unsightly under the hood.

What does the HSP Factory Replacement Coolant tank do differently?

To start the HSP Factory Replacement Coolant tank is made of precision-cut metal. We do this for a few reasons, first off it looks so much better when we can powder coat the tank to match or accent colors under the hood. Secondly, the metal is not going to fatigue with the heat like the factory plastic parts and crack due to that fatigue. The HSP Factory Replacement Coolant tank is a drop-in style replacement so all the factory fitting provisions are in place as well as the factory low-level coolant sensor is in place.

What comes with the HSP Factory Replacement Coolant tank?

  • (1) Factory Replacement Coolant tank
  • (1) Radiator Cap
  • (2) 1/2" Worm Gear Clamps
  • (1) 1" Worm Gear Clamp
  • (1) LB7 - LMM Low Coolant Sensor
  • (1) 1/2" NPT Float Switch
  • 14" of 1/2" heater hose

What Does the HSP Factory Replacement Coolant tank fit?

  • LMM: 07.5-10 VIN Code 6

How do people know the VIN code?

Engine code is dictated by the 8th character of the VIN number. The 10th character is the year of the truck.


  • Drop-in design
  • Factory provisions for fittings
  • Uses factory low coolant sensor
  • Made from CNC Cut and Bent Aluminum
  • Powder coat options to clean up the engine bay

Our Warranty


At HSP we believe in our products and we stand firmly behind every single one that leaves our facility. For years we have taken care of almost everything & anything that our customers had issues with, but we didn’t have a “set in stone” warranty. We have always gone above and beyond for our customers which set us apart from the rest. We will continue that same standard, but now we are taking things to the next level. Below you will be able to clearly read & understand our “No BS” warranty, its process, and the guidelines in which to follow.

For More information about our Lifetime, No BS Warranty click HERE.