I don't think it need a third but I can certainly say that a few time I was crawling over railroad tracks thinking my dump valves would hit the ground. I contributed this to my hitch being out of adjustment.
2009 Silverado w/5000 lbs airbags and P3 controller.
2013 Rockwood 2702SS
US Army Veteran
I didn't even receive my new TT yet and already disappointed . Really liked that tv cabinet and the three step entry can't understand why they changed these features . actually pointed the cabinet out to the dealer before ordering and she called the factory and they said they didn't change it. Because I seen some units with and without it on the internet.I figured they made the change on the more recent builds that why I ? it .Oh well guess I lose. Thanks for the info and I hope you have good luck with your TT and lots of fun.
2019 Cedar Creek Silverback 31IKS
2017 F 250 6.2 gas 4.30 8' bed