GM / Chevy 4L80E Transmission Pump Assembly – Remanufactured (1997–2003)

GM / Chevy 4L80E Transmission Pump Assembly – Remanufactured (1997–2003)

The GM/Chevy 4L80E remanufactured transmission pump assembly (1997–2003) is a critical component for vehicles equipped with the 4L80E 4-speed automatic transmission. This pump assembly maintains hydraulic pressure throughout the transmission, ensuring smooth clutch engagement, consistent torque transfer, and precise gear shifts. Its precision remanufactured design delivers reliable performance, durability, and long-term efficiency for trucks, SUVs, and performance vehicles operating under heavy-duty or everyday conditions.

Over time, worn pump gears, leaks, or low hydraulic pressure can lead to slipping, harsh shifts, delayed engagement, or transmission fault codes. Replacing the 4L80E pump assembly restores proper hydraulic flow and improves overall shift quality, protecting clutches, planetary gear sets, and other critical internal components. Installing a remanufactured pump during a transmission rebuild ensures long-term reliability and optimal transmission performance.

This remanufactured 4L80E pump assembly is compatible with all 4L80E transmissions from 1997 through 2003. Always verify the vehicle’s transmission code, engine type, and model year before ordering to ensure proper fitment. Correct verification guarantees smooth hydraulic operation, precise engagement, and extended transmission life.

For best results, pair this pump assembly with a complete transmission rebuild kit, including clutch packs, friction plates, bearings, seals, and filters. Customers can also browse related components on our site, including 4L80E valve bodies, rear planetary assemblies, forward clutch drums, and hard parts, to complete a full transmission rebuild or service.

4L80E Transmission Parts

Vehicle Compatibility

GM / Chevrolet Applications

• Chevrolet Silverado 1500 / 2500 / 3500 (V6 & V8): 1997–2003

• Chevrolet Tahoe / Suburban / Blazer: 1997–2003

• GMC Sierra 1500 / 2500 / Yukon: 1997–2003

• Cadillac Escalade / Hummer H1: 1997–2003

Fitment Notes

This remanufactured 4L80E pump assembly fits 1997–2003 4L80E transmissions only. Always confirm the transmission code, model year, and engine type before purchase. Proper verification ensures hydraulic efficiency, smooth clutch engagement, and extended transmission life.

Consult official GM service manuals for installation procedures, torque specifications, and assembly guidance.

4L80E Transmission Diagram