Where is warning flasher switch (module) located? on 1999 Chevrolet Express 3500

Flashers and the turn signals do not work. I need to replace the flasher relay switch. Where is it located?

Asked by for the 1999 Chevrolet Express 3500
the flasher is located on a connector that is bolted to the bottom of the dashboard right where your right knee would be. It is an electronic unit, and is very failure prone, althogh the newer ones sem to be more durable.
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where is it