Review on 🔧 GM Genuine Parts 296-16 Crankshaft Front Oil Seal: High-Quality Seal for Superior Engine Performance by Daniel Drury

In my humble opinion you should change both the oil seal and the gasket on the back of the engine and never just one. It's a lot of work to "maybe" fix the problem for a while. Change both and forget about them for another 200,000 - 300,000 km. You will need an installation/alignment tool to replace the gasket along with the oil seal. Don't skimp on this part or your seal may leak prematurely and all that work was wasted. This seal worked fantastically well. Be sure to lubricate the gasket before installation to avoid abrasion or tearing. Much luck.