Can someone tell me where this thing is at? 1988 2500 4x4 auto 6.2 n/a motor. I heard that it messes with glow-plugs shift pattern of trans, makes a humming in radio. I got all those symptoms. I've had people show me the EGR valve. It has to have a electrial wire to it. Oh yea it should cost around $100.00 everything else does anymore.