JkorkM Water Pump Assembly with Thermostat for Chevy GMC 4.8L/5.3L/6.0L — Direct-Fit, Gaskets Included

The JkorkM AW5104 is a complete water pump assembly with a pre-installed thermostat designed to restore reliable engine cooling for Chevy, GMC, and compatible GM-family V8 engines (4.8L, 5.3L, 6.0L).

This ready-to-install unit replaces multiple OEM numbers and bundles gaskets and gloves so you get a direct-fit repair that reduces downtime. Built for late‑1990s to mid‑2000s GM trucks, SUVs and utility vehicles, the assembly pairs a precision pump housing with a temperature-sensitive thermostat to help maintain proper coolant flow under normal driving conditions.

How does this water pump assembly improve engine cooling compared to replacing parts separately?

Installing the pump and thermostat together ensures mating surfaces are sealed correctly and the thermostat opens at the intended temperature. That coordinated replacement minimizes leaks, avoids mismatched wear, and reduces the chance of redoing labor later.

• Pre-installed thermostat inside the pump housing for correct alignment and sealing.
• Included gaskets ensure a leak-resistant installation.
• Replaces multiple OEM part numbers for straightforward compatibility.

Will this fit my vehicle and which OEM numbers does it replace?

The AW5104 assembly is engineered to replace many GM OEM references and fit a wide range of models from Chevy, GMC, Buick, Cadillac, Hummer, Isuzu and Saab from roughly 1999–2006. Verify fitment by cross-referencing the listed OEM numbers or your vehicle’s year and engine size (4.8L, 5.3L, 6.0L).

• Compatible with Chevy: Silverado, Tahoe, Suburban, Express, TrailBlazer, SSR, and certain W-series trucks.
• Compatible with GMC, Buick, Cadillac, Hummer, Isuzu, Saab model ranges listed in product details.
• Replaces OEM numbers including AW5104, AW5087, 12456113, 12458935, 12569519 and many others.

What comes in the package and what should I expect during installation?

The kit ships as a fully assembled water pump with the thermostat already installed in the housing, plus new gaskets and installation gloves. Because the thermostat is pre-mounted, installation is simplified: you fit the assembly, torque the recommended bolts, and refill the cooling system per manufacturer specs.

• One AW6009 water pump assembly with thermostat pre-installed.
• Gaskets included to replace old seals and prevent leaks.
• Installation gloves supplied for cleaner, safer handling during service.

How will this part affect long-term cooling reliability?

Replacing both the pump and thermostat at once reduces the odds of a thermostat-related failure shortly after pump replacement and helps the cooling system operate as intended. The matched components and fresh seals support consistent coolant circulation and pressure control under varied driving loads.

• Thermostat regulates flow based on coolant temperature for consistent operation.
• New bearings and impeller restore pump efficiency versus worn originals.
• Fresh gaskets minimize leak risk that can lead to overheating or loss of coolant.

Who is this for? The JkorkM AW5104 water pump with thermostat is aimed at do-it-yourself mechanics, professional technicians and fleet maintenance teams working on late‑1990s to mid‑2000s GM V8 trucks and SUVs (4.8L, 5.3L, 6.0L) who want a complete, OEM-replacing assembly that shortens repair time and reduces the chance of follow-up failures. If you need a direct replacement that comes ready to install with necessary seals and a mounted thermostat, this kit is designed to meet those needs.