Thumping in front end
 

I was driving home a few days ago and out of nowhere got a loud thumping in the front end of my truck. 03 2500hd. thought it was a driveshaft but everything feels ok. someone said it was a cv but i dont have anywhere to take it to get it apart to see. is there any way to check this or is this a common problem? Searched the site but nothing found.