Where is the serpentine belt tentioner located on a 1995 Cadillac Eldorado North Star Motor?

On a 1995 Cadillac Eldorado with the Northstar engine, the serpentine belt tensioner is located on the front of the engine, on the passenger side. It's typically fairly accessible, but you might need to remove some smaller components (like the air cleaner housing) for better access depending on your specific tools and comfort level.