I've got a receiver hitch that came off of my K10 pickup. It appears to be specifically for this application as it mounts using the factory spare tire frame holes under my truck. I don't know how/if it would work for K5 or Burbs since the tank is in that area. Not sure what it's rated for, but it's pretty heavy. Not the best looking thing, as one of the loops for the safety chain is bent. I'm going to chunk it unless someone wants it for $10 +shipping.