:gasp:Hey all, I have a 2004 Silverado with approx. 93,000 miles. Today the service 4wd message came on and all of the 4wd lights were out. I shut it off and restarted it but no change. I pulled the 4wd fuse, it looked fine, replaced it, restarted the truck and it is back to normal. Is this an issue that I should be concerned with or is it just a fluke? Thanks.