HSP Diesel 2015-2016 LML Duramax Factory Replacement Coolant Tank - 527-2-HSP

HSP Factory Replacement Coolant Tank for 2015-2016 Chevrolet / GMC Duramax LML

Part Number: 527-2-HSP

The HSP Factory Replacement Coolant Tank is a critical upgrade for 2015-2016 LML Duramax-equipped Chevrolet and GMC trucks. This component replaces the failure-prone factory unit with a stronger, better-looking solution designed for long-term durability and performance.

Why Upgrade to the HSP Coolant Tank?

The OEM coolant tank is constructed from plastic, which becomes brittle over time due to heat cycles. This brittleness leads to cracks, leaks, and ultimately coolant system failure. Additionally, the plastic discolors and yellows, making your engine bay look aged and poorly maintained.

What Makes the HSP Coolant Tank Different?

The HSP Coolant Tank is CNC-cut and bent from high-quality aluminum, eliminating the risk of cracking. Its a direct drop-in replacement, meaning it fits the OEM location and works seamlessly with factory provisions and fittings — including the factory low coolant level sensor. With the aluminum construction, you also gain the option to powder coat for a clean, custom appearance under the hood.

Whats Included

• 1x LML (15-16) Factory Replacement Tank (HSP-IN-708-16)
• 1x Radiator Cap (RFB-806-RFAB)
• 14x 1/2" Heater Hose (RFB-400-RFAB)
• 3x 1/2" Worm Gear Clamp (RFB-405-RFAB)
• 1x 1" Worm Gear Clamp (RFB-406-RFAB)
• 1x Low Coolant Sensor (RFB-460-RFAB)
• 1x 3/8" Coolant Plug - Aluminum (RFB-808-RFAB)

Fitment

• LML: 2015-2016 (VIN Code 8)

Important: This coolant tank is designed specifically for 2015-2016 models due to slight engine bay variations. Confirm fitment using the 8th character (engine code) and 10th character (model year) of your VIN.

Overview

• Reuses factory low coolant level sensor
• CNC-cut and bent aluminum for durability
• Eliminates failure-prone plastic tank
• Powder coating options available for customization
• Direct drop-in replacement

Our Warranty

HSP "NO BS" LIMITED LIFETIME WARRANTY

We proudly back every HSP product with our industry-leading "No BS" Lifetime Warranty. You can count on us to support you no matter what — just like we always have. To learn more about what's covered and how to file a claim, click below.

Click here to read the HSP Warranty