I've read all the instructions in the forum and in the manual (section 5.4), tried all those instructions, and I never get a prompt on the GPS to allow the 20S to connect to the GPS.  Sometimes I get the "GPS pairing" prompt on the 20S, but most of the time I don't and that's following the same directions.

UPDATE: Here's what happens... I get to the point where the 20S flashes green rapidly, I setup my GPS to search for nearby Bluetooth devices and the GPS simply cannot "see" the 20S.  Yes, Bluetooth is enabled on the GPS.  Is there something in the 20S configuration I need to do in order for it to broadcast a "here I am" signal so the GPS can find it?

So what is THE definitive method for connecting the Sena 20S to my Garmin device so I can hear GPS instructions through the Sena 20S?  I have the (latest) 1.6.2 firmware.  Thank you.  Not that it is relevant, but I have successfully paired the 20S with my Android phone so I can play music using an Android app and hear it in the 20S ear pieces.  I'm pleased at how good the sound is !

Also, to be clear... is there a difference between pressing down the jog dial and pressing the button in the middle of the jog dial?  The manual uses both device objects in their descriptions.  It looks like when I press the jog dial or the button, both the button and the dial go down. So I'm guessing that pressing either one does the same thing.  ???  In other words, I think the dial and the button are attached so pressing one also presses the other.  It would be nice if the instructions were consistent.