Ntoauto AW5104 Water Pump for 1999–2006 Silverado Tahoe Sierra Yukon — Direct-Fit, OE-Equivalent

Ntoauto AW5104 is a direct-fit replacement water pump engineered to restore coolant circulation in 1999–2006 GM trucks and SUVs with reliable sealing and OE-equivalent fitment.

If your Silverado, Tahoe, Sierra, Yukon or related GM platform is showing signs of overheating, coolant leaks, or reduced heater performance, the water pump is often the primary component to inspect. This Ntoauto AW5104 unit matches multiple OE reference numbers and fits a wide range of 1999–2006 GM models, offering a durable metal housing, corrosion-resistant components, and factory-style impeller geometry to help re-establish proper coolant flow.

Which vehicles will this water pump fit?

This pump is designed for GM trucks and SUVs produced between 1999 and 2006 that share the same cooling-system layout. It replaces numerous OEM part numbers and fits popular models across Chevrolet, GMC, Cadillac, Hummer and other GM nameplates within the specified years.

• Direct fit for Silverado and Sierra (1999–2006)
• Compatible with Tahoe, Yukon and Suburban (2000–2006)
• Also fits Avalanche, Escalade, Trailblazer, Envoy, H2, SSR and select vans
• Matches multiple OE numbers: AW5104, AW5087, 12456113, 12556449 and more

How does this pump compare to the original equipment part?

The AW5104 replaces the factory pump with comparable dimensions, mounting pattern and impeller design so it bolts in without modification. Components are selected to resist wear and corrosion while passing pressure and leak tests before shipment.

• OE-equivalent fitment and bolt pattern for easy installation
• Durable metal housing and corrosion-resistant internals
• Factory-style impeller geometry to maintain correct coolant flow
• Quality-tested for leaks and sealing before shipping

What signs indicate you should replace the water pump now?

Replace the pump if you notice coolant pooling under the engine, persistent overheating, or a noisy front end near the accessory drive. Early replacement prevents engine damage caused by insufficient coolant circulation.

• Visible coolant leaks or dried coolant stains around the pump
• Engine temperature running higher than normal or frequent overheating
• Whining, grinding, or unusual noises from the pump area
• Reduced heater output in cold weather due to poor circulation

What warranty and support are included with this pump?

Ntoauto backs the pump with a 12-month assurance period and offers return or exchange options if issues arise. Customer support is available to answer fitment and installation questions to ensure you select the correct replacement.

• One-year assurance and return/exchange service
• Pre-shipment leak and quality inspections
• Customer support for fitment and troubleshooting
• Clear compatibility list to confirm vehicle match before purchase

Who is this for: This water pump is intended for DIY mechanics, independent shops and fleet owners maintaining late-1990s to mid-2000s GM trucks and SUVs who need an OE-equivalent replacement that fits a broad range of models. Choose this unit if you want a part that simplifies installation with matched mounting points and tested sealing, along with a one-year assurance for peace of mind. If you are unsure about fitment, check the listed compatible models and OE numbers or contact customer support before ordering.