AMD Back Glass Window Gasket Seal, Black Lockstrip, Big Back Window, 55-66 Chevy GMC Truck G-WKT5561LGM

Restore watertight confidence on your classic Task-Force and early C/K pickups with this Back Glass Window Gasket Seal with Black Lockstrip. Engineered for 1955-1966 Chevrolet and GMC trucks equipped with the large rear window, this OE-style replacement uses premium ozone-resistant EPDM rubber to deliver factory-fresh fit, finish, and durability—an essential restoration part for any vintage workhorse or show-ready classic truck.

The kit arrives with a flexible black lockstrip that snaps cleanly into the outer groove for a secure, weather-proof seal and authentic appearance. Supplied in a cut-to-fit length, the gasket adapts seamlessly to slight cab-to-cab variances found in second-series 1955-1959 Task-Force bodies and 1960-1966 C10-C30 platforms. Because AMD adheres to strict OE specifications—including Shore-A hardness and UV stabilizers—the seal resists shrinkage, chalking, and cracking through decades of temperature swings.

Seal your classic Chevy or GMC’s cab against the elements and showcase factory-correct styling with AMD’s Back Glass Window Gasket Seal featuring a black lockstrip. Designed to install during glass replacement, this precision-molded EPDM gasket delivers the durability, fit, and authenticity demanded by discerning enthusiasts—ensuring your vintage pickup stays dry, quiet, and ready for the next cruise-in.

Please note that this Back Glass Window Gasket Seal with Black Lockstrip is specifically designed to fit the back glass of 1955-1966 Chevy GMC pickup trucks with large rear window glass, making it a perfect replacement option for those who need to restore the structural integrity and weatherproofing of their classic truck's rear window.

Auto Metal Direct is a team of true car guys with years of experience in sheet metal reproduction, car restoration and paint/body work. We believe that quality is not subjective!  Our mission is to provide the best customer experience for the Ford, Mopar and GM classic car markets - both in products and in service. 

Our panels are made from proper gauge steel and include all correct-as-original clips, tabs, flanges, bends and seams. Each time a prototype body panel comes off of a new tooling, we test fit it on a car. The marked up prototype is then used to change and improve the tools, and a new prototype is produced. This procedure might be repeated multiple times but, once the part is finally approved, you can be assured of a quality part.

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