External leaks and lost line pressure both trace back to gaskets and seals that hardened with age and heat.6L80E input shaft lock up oring. The rubber is rated for the fluid the unit runs, so it stays pliable instead of hardening in the first heat cycle.O-ring groove dimensions are what decide whether a seal holds pressure or takes a set. Shipping weight is 0.2 lb.The parts list below is exactly what ships. Compare it against your teardown before ordering.REMCO has supplied automatic transmission parts since 1991, and every order ships with its part listing so the receiving technician can check what arrived against what was ordered. Transmission Gasket for 6L80E - replacement component designed for proper fit and function Designed to support proper case sealing, port isolation and fluid retention during a reseal Package Includes: one transmission gasket as described, supplied loose for a reseal Gasket material cut to the stock bolt pattern and port layout - designed for dependable service in the intended application. Ships at 0.20 lb, 8x5x1 in Intended for shops resealing the unit. Clean both surfaces to bare metal and torque in sequence to the service manual figure What's in the box1 x Shaft, 6L80E Input Lock Up OringCompatible vehiclesFits CTS-V [06-15], Escalade/ESV/EXT [07-15], SRX [06-09], STS [06-11], XLR [06-11], Camaro [10-13], Corvette [06-11], SS [14-17], Avalanche [08-13], Express 2500 [10-11], Express 3500 [10-11], Silverado 1500 1/2 Ton [07-09].