first is everytime I shift back into park my horn goes off , second my oil level seems to be going up a little truck has 90000 miles on it and third when I rev the motor it idles down real slow are these things normal for a 2005 with the cummins . ,thanks and this is my 4th cummins , I just got rid of a 2006 f250 with the powerstroke , and yes now I do sleep better . thanks