I was messing around in the engine bay and seen a what appears to be a vacuum line that got stuck in my header. I pulled the melted part out of the header and traced the line to the top of the transmission. Its a 700r in an '84 Blazer. Is this a vacuum line that needs to get attached somewhere or is it jus a vent line. I dont see anything in the engine bay that is missing its hose, so dont know where it goes to tell ya the truth. Any help?