Reverse Lights, 2002 Chevrolet Avalanche

hope I am in the right spot... 2002 chevy avalanche 1500.... I upgraded my side mirrors to tow mirrors with turn and reverse lights. I got the turn lights to work but I need to run a wire from reverse to the mirrors, so my question is does anyone know where I can get a reverse wire? I know where the computer is so is there a wire I can tap in too?

Light Green at inside rear view mirror. Wiring runs down left pillar, should be accessible at junction block on floor by firewall...left side far forward.

just wondering why does the rear view mirror hook up to the reverse lights?

It's an auto-dimming mirror. The reverse signal disables the dimming function, makes mirror 'brighter'

I did not know that, thank you... I will try tomorrow thanks again

thank you Ween it was the right wire I was looking for...