I don't believe there is one. The P Pump (mechanical) diesels have one because that is the only way to stop them but I do not believe the 24 valve trucks from 98 1/2 to 2002 have one. I assume the VP44 injection pump just stops pumping fuel. I am getting ready to convert my 2002 to a P Pump configuration and have been studying up on it. Since nobody had answered yet, I thought I would give you my thoughts.