Factory Replacement Coolant Tank for 2001-2007 LB7 / LLY / LBZ Duramax

HSP Factory Replacement Coolant Tank for 2001-2007 Chevrolet / GMC Duramax LB7 / LLY / LBZ

The 027-HSP, or HSP Factory Replacement Coolant Tank, is designed for 2001-2007 Chevrolet and GMC Duramax trucks. Its a perfect upgrade that delivers both function and style while retaining OEM fitment.

Why You Need an HSP Factory Replacement Coolant Tank

As your truck ages, OEM plastic tanks become prone to cracking, leaking, and general failure. HSPs aluminum replacement resolves those issues and offers a cleaner, more durable solution that also looks great in any engine bay.

What Makes the HSP Tank Different?

The factory tank is plastic, discolors over time, and cant handle long-term heat or pressure. HSP starts with precision CNC-cut aluminum, forms and welds it by hand, and finishes with your choice of powder coating. Designed with all factory provisions and fittings, it even reuses the OEM low coolant sensor to avoid triggering any check engine lights. This tank is a true drop-in replacement built to last.

Whats Included

• 1x Factory Replacement Coolant Tank (HSP-IN-709)
• 1x Radiator Cap (RFB-806-RFAB)
• 1x 1/2" Heater Hose (RFB-400-RFAB)
• 1x 1/2" Worm Gear Clamp (RFB-405-RFAB)
• 1x 1" Worm Gear Clamp (RFB-406-RFAB)
• 1x Low Coolant Sensor (RFB-459-RFAB)

Fitment

• LB7: 0104 (VIN Code 1)
• LLY: 04.505 (VIN Code 2)
• LBZ: 0607 (VIN Code 2 or D)

Note: Engine code is found in the 8th character of the VIN; model year is the 10th character.

Overview

• Aluminum construction for strength and longevity
• Factory drop-in replacement
• Factory cap and sensor compatibility
• Powder coat and custom color options available
• Eliminates cracking and discoloration of OEM plastic tanks

Our Warranty

HSP NO BS LIMITED LIFETIME WARRANTY

At HSP, we believe in our products and stand behind everything we build. For years we've taken care of nearly any issue our customers have faced—even without a formal warranty policy. Now, weve put it in writing: our No BS Warranty. Its simple, straightforward, and built on the same values weve always had.

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