Chevrolet Tahoe 2007 obd diagnostic connector location?

The OBD-II diagnostic connector on a 2007 Chevrolet Tahoe is typically located under the dashboard, on the driver's side. It's usually near the steering column, often in a recessed area. It's a 16-pin connector.

You might need a flashlight to see it clearly. If you can't find it in that general area, a quick online search for "2007 Chevy Tahoe OBD port location" along with images will likely show you exactly where to look.