Description
Upgrade your Duramax with a heavy-duty welded water pump designed to eliminate a known failure point in 2001–2005 GM 6.6L LB7 and LLY engines. This pump begins as a brand-new ACDelco 252-838 / GM 19113733 unit, then undergoes a precision welding process that permanently secures the impeller to the shaft — solving the slippage issue found in the original press-fit design.
Whether you’re towing, tuned, or just want long-term reliability, this is the upgrade your Duramax cooling system needs.
Features:
– OEM ACDelco 252-838 core with welded impeller shaft
– Prevents slippage under high load or RPM
– Direct bolt-on replacement — no core return required
– Includes gasket and O-rings for easy installation
– Backed by GM OE quality and fitment
Fitment:
2001–2004 Chevy/GMC Silverado & Sierra 2500HD/3500 (6.6L Duramax LB7)
2004.5–2005 Chevy/GMC Silverado & Sierra 2500HD/3500 (6.6L Duramax LLY)
Part Numbers:
GM: 19113733 | ACDelco: 252-838
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