Okay guys I am thouroughly confused. For the last couple of weeks everytime I start my truck it dings shortly after starting it. The time between starting and the dinging varies. Sometimes its just after running for a while and sometimes it does not do it till I have rolled down the road a ways. The only consistency is that it does it after every time the truck is started. The truck starts and runs just fine. No warning lights are illuminated. Nothing. Any help or thoughts on this would be great. 1999 Cummins 2500 24 valve 5spd 4x4 all stock minus some guages and a missing silencer ring.