Water Pump 45005 AW5087 AW5104 for 1999-2006 Chevy GMC Cadillac

In this review of the Water Pump 45005 AW5087 AW5104, the bottom line is simple: this replacement pump is aimed at owners of 1999-2006 Chevrolet, GMC and Cadillac trucks and vans who need a reliable, direct-fit cooling pump without premium dealer pricing. The reviewer found the pump delivers solid cooling performance and generally accurate fitment for 4.8, 5.3 and 6.0L V8 engines, and highlights the brand's emphasis on high performance components and factory quality controls as the main reasons to consider it.

Key Features

• Direct fit compatibility: Designed for a long list of OE cross reference part numbers to fit Silverado, Tahoe, Sierra, Yukon, Escalade, Express, Savana, Envoy and similar models with 4.8, 5.3 and 6.0L engines, reducing installation guesswork.
• Premium materials: Manufactured with upgraded components and strict quality checks intended to improve service life compared with basic replacement pumps.
• Factory quality standards: Produced in facilities that are ISO 9001 and IATF 16949 certified, which supports consistent build quality and traceable processes.
• Professional testing: Each unit undergoes professional bench testing with specialized equipment to verify function before shipment.
• Warranty support: The included one year free replacement policy gives added protection against early failures and helps buyers feel confident after purchase.

Who It's For

This pump is best for DIY mechanics and independent shops replacing a failed water pump on late 1990s to mid 2000s GM V8 trucks and vans that require one of the listed cross reference numbers. It suits owners who want a balance of value and durability backed by certified manufacturing processes and a one year replacement commitment.

Those who should look elsewhere include owners needing OE-branded dealer parts for vehicle history or collectors who require original OEM packaging and branding. If an application requires a different mounting layout or an uncommon motor variant, confirm fitment carefully before purchase.

Pros & Cons

Pros

• Good fitment for the specified 4.8/5.3/6.0L GM engines based on matching cross reference numbers.
• Manufactured to ISO 9001 and IATF 16949 standards, which supports consistent quality control.
• Comes with a one year free replacement policy and professional pre-shipment testing.

Cons

• Some customers reported mixed experiences with the breaker strength or a slightly loose heater hose outlet, so careful inspection at installation is advised.

Specifications

Compatible Engines	4.8L, 5.3L, 6.0L V8
Vehicle Fit	1999-2006 Chevy, GMC, Cadillac trucks and vans
Cross Reference	12456113, 12458935, 12569519, AW5087, AW5104, 45005, etc.
Quality Standards	ISO 9001 and IATF 16949 certified factories
Testing	Professional bench testing with DV Canada equipment
Warranty	1 year free replacement

Our Verdict

The Water Pump 45005 AW5087 AW5104 is a practical, value-oriented replacement for GM 4.8/5.3/6.0L engines that offers dependable cooling, certified manufacturing quality and a one year replacement promise. It is a sensible choice for independent mechanics and owners who need a direct-fit pump with verified testing, though installers should check hose outlet fit during installation.

Frequently Asked Questions

Will this pump fit my 2003 Silverado 5.3L?
Check the vehicle engine size and match one of the listed cross reference part numbers; the pump is intended for 4.8, 5.3 and 6.0L models from 1999-2006.

Does the pump include a warranty?
Yes, the product is covered by a one year free replacement policy for early defects.

Are these pumps tested before shipping?
Yes, units undergo professional testing with certified equipment to verify function prior to shipment.