On this trip the hitch started to whine, I tow a 23 foot TT with a chevy Tahoe and the hitch started whining and moaning on this trip especially when turning, but you can hear it on some bumpy areas i...
Sounds to me like the anti sway bar might be too tight and is making that noise. Loosen it just a bit. Actually the noise doesn't hurt anything unless it is a lack of grease on the equalizer bars.