Western Hauler does great work. My folks had an '85 GMC 454 Crewcab 2wd, a '94 Chev 6.5td Crewcab 2wd, a 2001 Chev Duramax Extended cab 4wd, thought he didn't need the doors but guess what... 2005 Chev Duramax Crew 4wd.
All pulled 5th wheel horse trailers, flatbed beaver tail (mostly hay) trailer and a 36 foot tri-axle camper.
Lots of creature comforts and cup holders for the long haul.