Pulled the dog house on this on and line at left treat of engine leaking fuel. I think maybe this is a return line. Seemed a while back We got a set of fuel injector return lines which had a name. Also the flow plug module platic at the bottom is turning in to goo maybe from the fuel. I drove it for what was a trans shift concern, but it starting surging and barely made back to dealer and cut off and now a no start.we maybe have a working ngs. No turn signals ,wipers don't work and and light on with no speedometer. Thinking maybe that's a diff speed sensor. More fun for me!