UNITHUB Engine Water Pump for GM 3.5L/3.9L Cars — Direct-Fit with Gasket, OEM Interchange 89017757

UNITHUB water pump with gasket is a direct-fit replacement pump engineered to restore proper coolant circulation for GM 60° V6 engines (3.5L/3.9L) used in select Chevrolet, Buick, Pontiac and Saturn models from 2006–2011.

This replacement assembly includes the pump and gasket set designed to match OEM mounting points and cooling passages. Built with die-cast housing options, heat-treated shafts, and precision bearings, the unit aims to return reliable cooling performance and a leak-free seal when installed to factory procedures. Confirm compatibility using vehicle year, make, model and the interchange numbers listed below before purchase.

Which vehicles and engines does this pump fit?

This pump is intended for GM 60° V6 High-Value engines, specifically applications in mid-2000s to early-2010s models where the original part numbers match. It serves a range of Buick, Chevrolet, Pontiac and Saturn cars, minivans and crossovers.

• Buick Lucerne (2009–2011), Buick Terraza (2006–2007)
• Chevrolet Impala (2006–2011), Malibu (2006–2010), Monte Carlo (2006–2007), Uplander (2006–2009)
• Pontiac G6 (2006–2010), Montana (2006–2009)
• Saturn Aura (2007–2008), Relay (2006–2007), Vue (2008–2010)

What interchange and OEM numbers should I check?

Use interchange numbers to verify a correct match with your vehicle’s original pump. Cross-referencing these identifiers helps you avoid fitment errors and ensures the pump matches bolt patterns and coolant routes.

• Common interchange numbers: AW6020, 89017757, 42586
• Additional OEM and cross-reference IDs: 1309660, 130-9660, 252897, 19251026
• Other related references: 251697, 89060479, 12702111, 12591880, 12609000

What are the construction and durability features?

The pump is manufactured with reinforced materials and upgraded internal parts to withstand thermal stress and prolong service life. Precision-ground bearings, heat-treated shafts and coated sealing surfaces are intended to resist wear and maintain dependable sealing under typical engine-room conditions.

• Die-cast housing (cast iron or aluminum) for thermal resistance and rigidity
• Heat-treated shafts and precision bearings for extended durability
• Coated sealing components and uniform coolant channels to reduce leaks and turbulence
• Engineered to meet or exceed OEM performance standards

What comes in the package and how straightforward is installation?

The pump arrives with the gasket and necessary accessories shown in product images so it can replace the original unit directly. Proper installation requires following factory torque specs and coolant bleeding procedures to avoid air pockets and ensure long-term performance.

• Includes water pump assembly plus gasket and accessory hardware as pictured
• Direct-replacement design that matches OEM bolt pattern and ports
• Recommended: verify compatibility through OEM numbers or Compatibility Garage before ordering

Who is this for: This UNITHUB water pump is for DIY mechanics, independent repair shops and fleet managers who need a cost-effective, factory-form replacement for GM 60° V6 cooling systems in the listed Buick, Chevrolet, Pontiac and Saturn models. If your vehicle matches the years and part numbers above and you want an assembled pump with gasket ready for installation and tested components for dependable circulation, this unit is built to meet those needs.