Engine Oil Pump for Chevrolet Suburban, Tahoe, and GMC Sierra 1500 (Part Nos. 12744611, 12733671)

OE Numbers:

12744611, 12698354, 12731661, 12733671, 12721660

12670739, 12685330, 12689919, 12697075

Fits the Following Models:

Chevrolet Silverado 1500 2019-2025

Chevrolet Silverado 1500 LTD 2022

Chevrolet Suburban 2021-2025

Chevrolet Tahoe 2021-2025

Chevrolet Express 2500 2021-2025

Chevrolet Express 3500 2021-2025

GMC Savana 2500 2021-2025

GMC Savana 3500 2021-2025

GMC Sierra 1500 2019-2026

GMC Sierra 1500 Limited 2022

GMC Yukon 2021-2025

GMC Yukon XL 2021-2025

Materials: This engine oil pump typically features an ADC12 die-cast aluminum alloy pump body, powder-metallurgy iron-based inner and outer rotors, a 40Cr alloy steel drive shaft, an FKM (fluoroelastomer) seal, and PA66-GF30 (glass fiber reinforced nylon) guide components.

Operating Power: This oil pump is mechanically driven by the engine and does not require an external power source; therefore, it has no independent power rating. Oil flow rate and pressure vary based on engine speed and oil viscosity. Application: Suitable for engines in the Chevrolet Suburban, Tahoe, and GMC Sierra 1500; replaces engine oil pumps with part numbers 12744611 and 12733671.

Function: Draws oil from the oil pan and delivers it under pressure to the crankshaft, camshaft, pistons, and other lubrication points to maintain proper engine oil pressure.

Working Principle: The engine drives the internal pump rotor via a chain or gears; changes in the pump chamber volume facilitate oil intake and discharge. A pressure-limiting valve opens when oil pressure becomes excessive to protect the lubrication system.