This is an OEM rear main crankshaft seal for the LTG engine. 

Fits: 2013-2019 Cadillac ATS, 2016-2022 Chevrolet Camaro, 2013-2021 Chevrolet Malibu, 2014-2020 Buick Regal, 2014-2019 Cadillac CTS, 2016-2021 Buick Envision, 2016-2018 Cadillac CT6, 2018-2020 Chevrolet Equinox, 2018-2021 Chevrolet Traverse, and 2018-2021 GMC Terrain