When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2001-2005 LB7 LLY Duramax Welded Water Pump Upgrade GM 19113733 ACDelco 252-838
If you’re replacing the factory water pump on your LB7 or LLY Duramax, go with an upgrade that eliminates a well-known failure point. This welded impeller water pump is designed to solve the issue of impeller slippage — a problem commonly found in the stock press-fit style used on 2001–2005 GM 6.6L Duramax diesel engines.
This pump starts with a brand-new ACDelco 252-838 / GM 19113733 water pump core, then professionally welded at the impeller-to-shaft connection for improved strength and fail-safe reliability under high load and performance use.
Why Choose a Welded Water Pump?
- Prevents Impeller Slippage: A known issue on factory pumps during towing or high RPM.
- Improved Durability: Welded shaft & impeller offer permanent alignment and secure engagement.
- Ideal for Performance Builds: Essential for tuned or deleted trucks, heavy hauling, or off-road use.
- Same GM Quality Core: Built using OEM-spec ACDelco/GM pump for proper fitment and flow.
- Includes Gasket & O-Rings: All necessary seals for a hassle-free installation.
ACDelco Part Number: 252-838 | GM Part Number: 19113733
Interchange Part Numbers: US63, 42349, 1305980, DP807, AW5098, DP807BH, 251723, 215-723, 19168888
Fitment: 2001-2005 Chevy/GMC Duramax Diesel 6.6L LB7 & LLY Engines
SHIPPING IS FREE via USPS Priority Mailto the lower 48 US states.
Alaska, Hawaii, Puerto Rico, Guam, APO/FPO addresses will need to email for a shipping quote.
CANADA, MEXICO, & ALL INTERNATIONAL BUYERS WILL NEED TO USE THE GSP (GLOBAL SHIPPING PROGRAM)
Thanks for looking, be sure to check out our other items!
