6L80 Gasket and Seal Kit 2006-2017 551121 OEM

Overview

Aftermarket gasket and seal kit for 6L80 automatic transmissions, 2006-2017 model years. Direct-fit replacement built to OEM specifications. Trusted in shops nationwide for 6L80 rebuilds and repairs.

Common Symptoms This Part Solves

Fluid leaks at pan, output shaft seal, axle seal, cooler line fittings; leaking pump seal. Used during rebuild or to address external leaks without full teardown.

Specifications

• Transmission: 6L80
• Part Type: Gasket and Seal Kit
• Brand: Aftermarket
• Part Number: 551121
• Year Range: 2006-2017
• Quality Level: Premium Aftermarket

Fitment

Fits GM, Chevrolet, GMC, Cadillac vehicles equipped with the 6L80 automatic transmission, 2006-2017 model years. Cross-check your transmission ID tag and existing part number before ordering. Contact us for fitment verification on borderline year-model combinations.

Quality & Service

Free shipping on orders over $99. Same-day shipping on in-stock parts. All parts are sourced through verified suppliers and inspected before fulfillment. Questions about fitment or installation? Contact our team — we know 6L80 transmissions inside and out.