Where is drain plug on 1971 Buick Skylark?

The drain plug on a 1971 Buick Skylark is typically located on the oil pan at the bottom of the engine. It is a hexagonal bolt that you can unscrew to drain the engine oil. Additionally, if you're looking for the Transmission Fluid drain plug, it is usually located on the transmission pan itself. Always ensure the vehicle is securely lifted and supported before attempting to drain fluids.