AW6738 Water Pump 251-821 for Chevy Silverado Suburban Tahoe Camaro

In this review the AW6738 water pump is examined as a direct replacement for GM V6 and V8 engines from 2014 through 2020. The bottom line: this pump is for owners and independent mechanics who need a reliable, OEM-replacement unit that matches multiple factory part numbers and fits a wide range of Chevrolet, GMC and Cadillac models. It stands out because of its case hardened bearings and TS16949 manufacturing, which translate to longer life and reduced risk of leakage or failure compared with unknown aftermarket options.

Key Features

• OEM compatibility: Matches numerous factory part numbers so it installs cleanly on supported Chevrolet, GMC and Cadillac engines without modification.
• Fitment coverage: Designed to fit Silverado, Sierra, Tahoe, Suburban, Yukon, Camaro and Escalade models from 2014 to 2020, reducing the need to search for multiple part variants.
• Durable bearings: Case hardened bearings provide higher load capacity and better tolerance to imbalance and vibration in the cooling system, which helps longevity under heavy use.
• Quality control: Manufactured in TS16949 certified facilities and 100% function and leakage tested to lower the chance of early failure after installation.
• Warranty: Comes with a one year or 50,000 km limited warranty for added protection against defects.

Who It's For

This pump is aimed at DIY mechanics, fleet owners and independent repair shops replacing failed water pumps on compatible GM platforms, especially V6 4.3L and V8 5.3L, 6.0L and 6.2L engines. Its broad part number compatibility and factory-style construction make it practical when a direct fit and proven materials are priorities.

It is less relevant for owners of vehicles outside the listed years and engine sizes or for those who prefer OEM dealer-sourced parts for factory warranty continuity; in those cases a dealer-supplied unit may be preferable.

Pros & Cons

Pros

• Broad compatibility with many GM part numbers simplifies ordering for multiple models.
• Case hardened bearings improve durability and reduce noise and wear under load.
• Produced in TS16949 facilities with 100% function and leakage testing, increasing confidence in out-of-box reliability.

Cons

• Limited to the specified GM engines and model years, so buyers must verify fitment carefully.

Specifications

Brand	AULINK
OEM Part Numbers	AW6738, 251-821 and multiple compatible numbers
Fitment	Chevrolet, GMC, Cadillac models 2014-2020 (select V6/V8 engines)
Bearing Type	Case hardened bearings
Quality Standard	Manufactured in TS16949 certified facilities
Testing	100% function and leakage tested
Warranty	1 year or 50,000 km

Our Verdict

The AW6738 water pump is a sensible, cost-effective replacement for owners and shops working on GM 4.3L and 5.3L to 6.2L engines from 2014 to 2020. Its strong build quality, tested manufacturing and wide part number compatibility make it good value for anyone who needs a reliable repair without sourcing dealer-only parts.

Frequently Asked Questions

Will this pump fit my 2016 Camaro 6.2L?
Yes, the pump lists compatibility with 2016-2020 Camaro V8 6.2L when the vehicle uses the referenced OEM part numbers.

Is the pump leak tested before shipping?
Yes, units are 100% function and leakage tested during production in TS16949 certified facilities.

What warranty is included?
The product includes a one year or 50,000 km limited warranty against defects.