IMHO on a ten year old truck you should be looking at a dually. Newer trucks upped the ratings numbers and with a two or three year old truck you might get by with a SRW. Heck a properly equipped 1500 could tow a 15,000 pound load. The issue with fifth wheels is pin weight. Accepted number for fivers is pin weight equals approx 20% of the trailers true weight. Lacking that, then lets assume your 15K fiver is GVWR. So..... that would give you a pin weight of around 3,000 pounds+/-. Can a SRW handle that much? As another example a ten year old 3500SRW Dodge Ram decently equipped will scale around 8000 pounds ready to travel, and have a GVWR of 10,000 pounds. You do the math and decide.