Katech Gen V L83/L86 Wet Sump Oil Pump

Katech Gen V L83 & L86 Wet Sump Oil Pump - High Volume Upgrade

Consistent Oil Pressure. Proven Durability. Engineered To Perform

The Katech Gen V L83 & L86 Wet Sump Oil Pump is designed for LT-based truck engines, delivering increased oil volume and pressure compared to standard LT car oil pumps. This pump replaces the factory powdered metal gear with a precision-machined 4140 billet steel gear, improving durability under load and sustained RPM.

Based on the OEM internal crank-driven oil pump design, this unit integrates with the Gen V LT oiling system while providing higher output characteristics than standard car-based LT oil pumps. This pump is supplied as a brand new assembly with no core required.

When used in car applications such as LT1/LT4, calibration changes may be required to disable oil pump-related diagnostic trouble codes. Use of this pump in those applications will result in slightly higher than OEM oil pressure. 

Key Features

• 4140 Billet Steel Oil Pump Gear Upgrade
• Eliminates Factory Powdered Metal Gear
• Increased Oil Volume and Pressure Compared to Standard LT Car Oil Pumps
• Internal Crank-Driven Oil Pump Design
• Direct Replacement For L83 and L86 Wet Sump Engines
• Can Be Used In LT1 And LT4 Applications with Proper Calibration
• May Require DTC Adjustment When Used in Car Applications
• Brand New Assembly - No Core Required
• Proudly Engineered, Manufactured and Assembled by Katech Engineering in Clinton Township, Michigan, US

Vehicle & Engine Fitment

Chevrolet

• 2014–2019 Chevrolet Silverado 1500 with L83 5.3L or L86 6.2L Engine
• 2015–2020 Chevrolet Tahoe with L83 5.3L Engine
• 2015–2020 Chevrolet Suburban with L83 5.3L or L86 6.2L Engine

GMC

• 2014–2019 GMC Sierra 1500 with L83 5.3L or L86 6.2L Engine
• 2015–2020 GMC Yukon with L83 5.3L or L86 6.2L Engine
• 2015–2020 GMC Yukon XL with L83 5.3L or L86 6.2L Engine

Cadillac

• 2015–2020 Cadillac Escalade with L86 6.2L Engine

Engine Applications

• Gen V L83 5.3L Engines
• Gen V L86 6.2L Engines
• Gen V LT1 and LT4 Engines When Increased Oil Volume and Pressure Are Desired

Important Fitment Notes

• Verify the engine code before ordering. Vehicle model and model year alone do not confirm fitment.
• Designed as a direct replacement for Gen V L83 and L86 wet sump truck engines.
• May be used in LT1 and LT4 applications when increased oil volume and pressure are desired.
• When installed in LT1 or LT4 applications, calibration changes may be required to disable oil pump-related diagnostic trouble codes.
• Use of this pump in LT1 or LT4 applications will result in slightly higher than OEM oil pressure.

Why Choose Katech Engineering

Since 1977, Katech Engineering has developed race-proven engines and precision-machined components for championship-winning motorsports programs and high-performance street applications. Every oil pump is engineered with the same focus on durability, fitment, and performance that defines Katech across endurance racing and GM performance platforms.

For applications requiring increased oil volume and pressure beyond standard LT configurations, this pump delivers a proven solution while maintaining factory integration.