I am currently pulling a Featherlite 9407 3 horse slant aluminum trailer with a 2001 Chevy full size suburban. I attempted to install a WDH but found the bars would set up only five inches from the ground. The trailer at level is only 10 inches. It pulls fine as is but I want to be safer. Any suggestions?

That does seem close to the ground. Is the Suburban and trailer level when you adjust the chains up? A wdh is important with horses, their high center of gravity and movement magnify any sway you have. My article on wdh is at http://mrtruck.net/wdh.htm

Thanks for your response. The actual height of the bottom of the A frame is 11 inches when level. The adjustable WDH I used makes the clearance at the bottom of the WDH only about 5 inches. The bars would be higher but I'm worried about clearance for bumps, train tracks etc.(I used Reeses HD WDH and trunnion Bars).
Is it too much? Would a lighter one do the trick? Any other suggestions?
Thanks again

Equalizer wdh will give you more clearance but if you already have the wdh, I wouldn't go ligher with a 3 horse. My article on wdh shows where the spring bars are on the trailer hitch. A Suburban has a nice wheelbase, tighted up the spring bars and see how tractions is. If they are too high your rear tires will slip more. You know if you only haul two horses to use the front stalls. I'd tighten up the spring bars with the heaviest horse up front and see how it handles.