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Oil pump GM 403ci, 6.6L ohv turbo Duramax 2001-10 stock repl


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Part No: OPM561
Oil pump GM 403ci, 6.6L ohv turbo Duramax 2001-10 stock replacement Silverado, Sierra (Rectangle oil pump pickup oil feed hole) Melling M-561, M561
Additional Notes: Check back of pump if rectangle or round oil pump pickup oil feed hole)
Availability:In Stock
$645.74 (incl Gst)
$624.91 (incl Gst)

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  Your Price $543.40
Keep your Duramax alive under load with this high-output stock-replacement oil pump for the GM 403ci 6.6L OHV Turbo Duramax engine. Built to deliver consistent oil pressure, fast lubrication, and reliable flow, this pump is the go-to solution for 2001–2010 Silverado and Sierra owners who demand durability from their diesel workhorse.

Featuring the correct rectangle oil pump pickup oil feed hole, this unit ensures proper fitment and OEM-level compatibility with factory Duramax lubrication systems. Whether you’re towing, hauling, tuning, or restoring, this pump provides the stable oil delivery needed to protect bearings, turbochargers, and high-load rotating assemblies.

Made in USA. Cast aluminum housing.


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