I am towing with a 2008 GMC Sierra
1500 Crew-cab. I was thinking with the ~600lb tongue weight that I did need a WDH.
The GMC owners manual says:
The trailer tongue weight should be 10 percent to
15 percent of the total loaded trailer weight, up to a
maximum or 600 lbs (272 kg) with a weight carrying
hitch. The trailer tongue weight should be 10 percent
to 15 percent of the total loaded trailer weight, up to a
maximum of 1,000 lbs (453 kg) with a weight distributing
hitch.
Thanks,
Jason