I have a 3500 chev duramax dually and might buy a 37 ft lacrosse soon. wondering if a WDH would be needed. I won't tow until next winter but the tow to home might give me a clue. Fifth for 20 years and guess it would be better but????.
I would say yes, with a 37ft TT. What does your truck's owners manual say? The towing section should when a WDH is recommended.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package