UPDATE:
I was wrong about the pin count. My old one is a 6 pin, the one I (we) need is a 7 pin.
Here are pics.
1st pic is my stock 6 pin that has no headlight tone.
2nd pic is a 7 pin unit out of a 97 Silverado.
As soon as I popped it in and turned on my headlights, I got tone!
