The egr valve is right below where the fuel lines come in. 2 bolts, replace it beofre you put the HSP on. Where did your mechanic find the other?Quoting Leo Heligas <llhelig@xxxxxxxxxxxxxxxx>: > On my previous Post I forgot to ask where in the H--- the EGR valves are.A > mecahnic friend says there are two of them on this beast. Do I need to > replace both of them or just one? The FSM is absolutely no help! > Thanks again. > Leo H. Drowned 83