LEAPTIGER Water Pump & Metal-Gasket Thermostat for 99–06 GM 4.8L–6.0L Trucks - Direct Fit, Pre-Installed Thermostat

LEAPTIGER AW5104 is a complete replacement water pump assembly with a pre-installed metal-gasket thermostat designed to restore reliable cooling for 4.8L–6.0L GM V8 engines from 1999–2006.

If your Silverado, Sierra, Tahoe, Yukon, Escalade or related GM vehicle is overheating, leaking, or showing cooling system warning signs, this OE-style water pump and thermostat kit is built to be a direct-fit swap that includes gaskets and seals for a straightforward installation. The assembly ships with the thermostat already installed, two metal gaskets plus an additional gasket, and carries LEAPTIGER's one-year warranty and 30-day refund policy for added confidence.

Will this water pump fit my truck or SUV?

The AW5104 is engineered to match bolt patterns, pulley flange, and flow specifications used on many GM small-block V8s. It fits a long list of 4.8L, 5.3L and 6.0L engines across Chevy, GMC, Cadillac, Buick, Hummer, Isuzu and Saab models from 1999–2006.

• Compatible models include Silverado, Sierra, Tahoe, Suburban, Avalanche, Yukon, Escalade, Express, Envoy, and more.
• Designed for 4.8L, 5.3L and 6.0L V8 engine families—confirm engine displacement and production year before ordering.
• Direct replacement: same mounting points and thermostat outlet orientation as original equipment.

What’s included and how does it simplify installation?

LEAPTIGER supplies the water pump with the thermostat pre-installed plus all the necessary gaskets to minimize parts hunting and reduce installation time. This kit removes uncertainty about compatibility of small seals and metal gaskets that commonly cause leaks when reused or mismatched.

• One complete water pump assembly with pre-installed thermostat for correct valve seating.
• Two metal gaskets and one additional gasket included to ensure leak-free sealing.
• Direct-fit design aims to use existing pulleys and accessory drive hardware—follow factory torque specs during installation.

How does LEAPTIGER ensure reliability and performance?

Components are manufactured under OEM-style standards and inspected through professional testing to deliver consistent performance and long service life. Quality control measures reduce the risk of premature failure common with lower-grade aftermarket pumps.

• High-quality materials and precision machining for durable impeller and housing performance.
• Rigorous QA testing on each unit to validate fitment and sealing characteristics.
• Backed by a 1-year warranty and a 30-day refund window for buyer reassurance.

How should I maintain or check the pump after installation?

After installation, run the engine to normal operating temperature and inspect for leaks, proper thermostat opening, and stable coolant flow. Periodically check for fluid discoloration, bearing noise, or shaft play as part of routine cooling system maintenance.

• Verify coolant level and pressure-test the cooling circuit after installation.
• Listen for unusual bearing noise or inspect for wobble at the pulley during idling.
• Replace coolant and thermostat housing hoses if aged to prevent future leaks.

Who is this for: This LEAPTIGER AW5104 water pump and thermostat assembly is intended for DIY mechanics, professional technicians, and fleet managers who need a reliable, direct-replacement cooling component for late‑1990s to mid‑2000s GM V8 trucks and SUVs. Choose this kit when you want complete sealing hardware, an already-installed thermostat to save time, and factory-style fitment backed by warranty coverage.