Thank you very much, Bill

Now, I have to see if it is polarity sensitive (for a 6v positive ground GMC). And, it says electro-mechanical, but no specific reference to LED. I'll find out.

Their (Novita/Tridon) 6 volt flasher is 2-pronged ( X & L ).
What will I lose if my system is designed for a 3-way flasher? (I'll call them and also ask.)

The signal wiring is a somewhat of a mystery to me. I got mine working (on my 6v neg ground Chev Suburban) but it was never with strong 6v bulbs (I think due to bad grounds, from epoxy/urethane paints not allowing screws to make good grounds). I will fix the grounding first.

I have found 6v LED bulbs for all my directional/marker lamps - they are VERY BRIGHT. But my various flashers do not work consistently. I'll be rechecking the wiring/routing and the grounds this summer.

I'll report back with my experiences (but, not until this summer, unfortunately).

Thanks again,