I've had a 2004 SLT 5.9 SB Club Cab 102,000 miles for about a week now. First off let me say I really am happy with the truck, 1st 1000 miles avg. 18.8 MPG hand calc. But I have a item I haven't figured out yet. Sometimes
( has happened 3 times ) when I back up the horn will beep and the lights will flash. At first I thought the previous owner had set this up as a backup alarm, but it does it less often than more and today when I put the truck in park and opened the door with it running the horn beeped;don't know if the lights flashed or not. Could this be a short in the security system ? Anyone had this problem ? Thanks in advance, and also I really like this site an am learning a lot.