2015-2015 Duramax LML HSP Factory Replacement Coolant Tank (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.