Performance Water Pump Kit for GMC Sierra 2500 HD,3500 HD (2007-2019) 6.0L

High-Flow Water Pump Kit for 2007-2019 GMC Sierra 2500 HD, 3500 HD (GMT900 / K2XX)

What it Does: The Performance Water Pump Kit replaces the failure-prone factory coolant pump and thermostat assembly on 2007-2019 GMC Sierra 2500 HD and 3500 HD trucks to maintain stable engine operating temperatures and eliminate coolant cavitation under sustained payload duty.

The Stock GMC Sierra 2500 HD, 3500 HD Cooling System Vulnerability

The factory cooling system on the Vortec 6.0L (LY6 / L96) encounters high thermal stress during prolonged trailering and severe duty cycles. The original mechanical shaft seal deteriorates over thermal cycles, leading to weeping from the weep hole, bearing play, and eventual impeller slippage. Compounding this, the factory thermostat housing often suffers from galvanic corrosion or housing warping, causing unmetered coolant bypass and localized overheating across the aluminum cylinder heads.

The Engineering Solution

This direct-fit water pump assembly features a precision-cast aluminum housing with reinforced internal fluid passages designed to reduce coolant flow restriction. Equipped with an upgraded, heat-treated unitized bearing assembly and an anti-cavitation stamped impeller, it ensures consistent coolant circulation across the block deck under continuous high-RPM towing. An integrated OEM-spec thermostat assembly and multi-layer rectangular block gaskets are supplied to ensure zero-leak sealing against the engine front cover.

What's Included

• 1 Engine Water Pump
• 1 Thermostat Housing
• 1 Thermostat
• 2 Rectangular Gaskets
• 1 Oval Gasket
• 2 Mounting Bolts

Technical Specifications

Compatibility

• 2007-2019 GMC Sierra 2500 HD 6.0L V8 Gas
• 2007-2019 GMC Sierra 3500 HD 6.0L V8 Gas

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT900 and K2XX Sierra 2500 HD, 3500 HD?

Yes, this is a direct fit for the 2007-2019 GMC Sierra 2500 HD and 3500 HD equipped with the 6.0L Vortec V8. Verify your engine displacement prior to purchase; this unit does not fit 6.6L Duramax diesel applications or 8.1L platforms.

What torque specification should be applied to the mounting bolts?

Torque the water pump bolts to 11 lb-ft on the first pass and 22 lb-ft on the final pass in a cross pattern to prevent gasket distortion.

The GMC Heavy-Duty Caliber

Engineered to handle sustained cooling system pressures, this pump delivers thermal reliability that keeps commercial fleet and heavy towing setups operating within ideal temperature limits under maximum payload.