GM / Chevy 8L90 Pump Chain & Sprocket Assembly (2015–2021)
The GM/Chevy 8L90 pump chain and sprocket assembly is a vital internal component for vehicles equipped with the 8L90 8-speed automatic transmission from 2015 through 2021. This assembly transfers power from the torque converter to the transmission pump, maintaining proper hydraulic pressure for clutch engagement, smooth shifting, and consistent performance. Its precision-engineered chain and sprocket design ensures durability under high-torque conditions, making it ideal for trucks, SUVs, and performance applications.
Over time, worn chains or sprockets can lead to low hydraulic pressure, slipping, delayed engagement, harsh shifting, or transmission fault codes. Replacing the 8L90 pump chain and sprocket assembly restores proper hydraulic function, improves shift quality, and protects clutches, planetary gear sets, and other internal components from premature wear. Installing this assembly during a rebuild ensures long-term reliability and consistent transmission performance.
This pump chain and sprocket assembly is compatible only with GM/Chevy 8L90 transmissions. Always verify the transmission model, year, and vehicle application before ordering to ensure proper fitment. Correct verification guarantees smooth power transfer, optimal hydraulic pressure, and extended transmission life.
For best results, pair this assembly with a complete transmission rebuild kit, including clutches, seals, bearings, and friction components. Customers can also browse related parts on our site, including 8L90 valve bodies, torque converters, rear planet assemblies, and hard parts, to complete a full transmission service.
Vehicle Compatibility
GM / Chevrolet Applications
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Chevrolet Silverado 1500 / 2500 / 3500 (V6 & V8): 2015–2021
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Chevrolet Tahoe / Suburban / Camaro: 2015–2021
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GMC Sierra 1500 / 2500 / Yukon: 2015–2021
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Cadillac Escalade / CT6: 2015–2021
Fitment Notes
This pump chain & sprocket assembly fits GM/Chevy 8L90 transmissions only. Always confirm the transmission code, model year, and engine type before purchase. Proper verification ensures smooth hydraulic operation, reliable clutch engagement, and extended transmission life.
Consult official GM service manuals for installation procedures, torque specifications, and assembly guidance.
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