Thats interesting, I'm gonna write you what a Year One catalog says about headlamp switches. "All 67 models, all 68 models except RS. This new GM service replacement switch does not have the internal light that came with the original switch". Does that means that you might have a replacement switch? Also they mention RS and non RS, what is the difference? I know they have to open the doors, maybe is for that purpose while cleaning them but is it that the RS have another position in the switch? Just curiosity.