I've been having trouble with my 98.5 2500 for sometime now. I go to start the truck and it "lopes" about 10-12 times and dies. I have no throttle response when pressing the pedal while it does this. I have replaced vp44, crankshaft position sensor, camshaft position sensor, throttle position sensor, grid heater relay, I have newer batteries, also cleaned the grounds really good in the batteries as they had a little bit of corrosion on them. When I turn the switch on it takes a couple of seconds for the WTS light to come on, when it comes on i can hear what I believe is the fuel pump priming.