Performance Water Pump Kit for Chevrolet Express 2500,3500 (2007-2020) 4.8L 6.0L

Heavy-Duty Water Pump Kit for 2007-2020 Chevrolet Express 2500, 3500 (GMT610)

What it Does: The Performance Water Pump Kit replaces worn or failing factory cooling assemblies on 2007-2020 Chevrolet Express 2500 and 3500 vans to maintain optimal coolant circulation and prevent thermal degradation under heavy hauling duty cycles.

The Stock Chevrolet Express 2500, 3500 Cooling Cavitation & Seal Breakdown

Factory cooling systems on the GMT610 commercial platform endure rigorous thermal cycles and sustained engine loads. Over time, the OEM mechanical unit's internal dynamic shaft seals degrade, resulting in weeping from the telltale vent hole, bearing play, and catastrophic impeller failure. Concurrently, factory thermostat housings on the LS-based Vortec (LY2, L20, LY6, L96) engines face warping and gasket compression set, causing pressure drops across the radiator channels and localized hot spots in the cylinder heads.

The Engineering Solution

Engineered for high-durability commercial duty, this direct replacement water pump features precision-cast aluminum housing geometry optimized for uniform fluid dynamic flow. An upgraded internal bearing assembly resists radial runout under belt drive tension, while a heavy-duty unitized shaft seal eliminates weep hole leakage. Paired with a direct-replacement thermostat and reinforced mating gaskets, this assembly prevents cavitation and ensures precise thermal regulation under peak payload and fleet trailering conditions.

What's Included

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

Technical Specifications

Compatibility

• 2007-2020 Chevrolet Express 2500 (4.8L V8, 6.0L V8)
• 2007-2020 Chevrolet Express 3500 (4.8L V8, 6.0L V8)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT610 Express 2500, 3500?

Yes, this is a direct fit for the 2007-2020 Chevrolet Express 2500 and 3500 equipped with the Vortec 4.8L or Vortec 6.0L V8 engines; verify engine displacement prior to installation as it does not fit 4.3L V6 or Duramax diesel models.

Do I need to bleed the system following installation?

Yes, thoroughly burp and bleed the engine cooling system to prevent trapped air pockets from creating hot spots or false temperature readings.

The Chevrolet Commercial Durability Standard

Severe-duty commercial haulers demand unyielding cooling efficiency. Engineered to sustain rigorous commercial towing demands, this water pump assembly delivers dependable thermal equilibrium on demanding fleet routes.