HSP Diesel 2007.5-2010 LMM Duramax Factory Replacement Coolant Tank - 427-HSP

HSP Factory Replacement Coolant Tank for 2007.5-2010 Chevrolet / GMC Duramax LMM

Part Number: 427-HSP

The 427-HSP is best known as the HSP Factory Replacement Coolant Tank for the 2007.5-2010 LMM Duramax-equipped Chevrolet and GMC trucks. This tank not only enhances the engine bay appearance but is a direct replacement that performs exactly like the factory part—only better.

Why Choose the HSP Factory Replacement Coolant Tank?

The OEM coolant tank on LMM Duramax trucks is prone to failure. Cracks and broken fittings are common issues due to its plastic construction. Over time, it also yellows and becomes an eyesore in the engine bay. Once compromised, repair isnt an option—only replacement. Thats where the HSP tank comes in.

What Makes the HSP Coolant Tank Better?

The HSP Factory Replacement Coolant Tank is crafted from CNC-cut and bent aluminum for superior strength and heat resistance. It can be powder coated to match or accent your engine bay, providing both form and function. The design retains all OEM fittings and sensor compatibility, making installation easy and clean.

Whats Included

• 1x Coolant Tank (HSP-IN-708)
• 1x Radiator Cap (RFB-806-RFAB)
• 14x 1/2" Heater Hose (RFB-400-RFAB)
• 2x 1/2" Worm Gear Clamp (RFB-405-RFAB)
• 1x 1" Worm Gear Clamp (RFB-406-RFAB)
• 1x Low Coolant Sensor (RFB-459-RFAB)

Fitment

• LMM: 2007.5-2010 (VIN Code 6)

Note: The 8th character of the VIN indicates the engine code, and the 10th character represents the model year.

Overview

• Drop-in design with OEM compatibility
• Factory sensor and fitting provisions
• Constructed from CNC cut and bent aluminum
• Eliminates cracking and yellowing from plastic tanks
• Powder coat options available for a clean engine bay

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand firmly behind every single one that leaves our facility. For years, weve supported our customers with flexible, top-tier service—even without a formal policy. Now, weve made it official. Our No BS Warranty outlines the process and your protections clearly and simply.

Click here to read the full HSP Warranty