Genuine GM 12644591 Engine Oil Pump 2011–2016 Chevy GMC LML 6.6L Duramax Diesel

Ensure proper engine lubrication and pressure with the Genuine GM 12644591 Engine Oil Pump, designed specifically for 2011–2016 LML 6.6L Duramax diesel engines.

This OEM replacement is engineered to meet or exceed factory performance and reliability standards, making it ideal for stock or modified builds. A worn or failing oil pump can lead to low oil pressure, engine wear, or catastrophic failure, especially after turbo issues or crankshaft work.

Highly recommended during any major engine service, including turbo replacement, bearing work, or crankshaft-related repairs.

Features:
- Genuine GM part – not aftermarket
- Delivers proper oil pressure for LML Duramax engines
- Precision-machined to OEM tolerances
- Reliable performance in high-demand diesel applications
- Recommended during major engine, turbo, or crankshaft repairs

Part Details:
GM Part Number: 12644591
Replaces: GM 12632219
UPC: 195491176454

Vehicle Fitment: 2011–2016 Chevy Silverado HD / GMC Sierra HD 6.6L LML Duramax