Did anyone figure this out? I just discovered the exact same thing. A tube with an elbow bend and a connecter of some type hanging loosen from the egr solenoid. I started looking and behind the sc pulley I found a clear plastic tube with nothing connected. So.... While trying to connect the clear tube to the egr solenoid I pulled it loose from WHEREVER it connects toward the rear of the motor, driver's side. What the hell does it connect to back there?!!! Damn I don't want to pull the exhaust manifold to figure it out but no doubt it will start coding if I don't reconnect it. Any schematic available on all this emissions tubing etc?