Originally Posted by Mzocchi
...took it on trip this past weekend and it handled very well so far with WD in place.
The suspension of the Trailblazer was probably severely overloaded. If you take it out again, load up with the normal passengers and stuff you'll have when towing and go to a truckstop that has a certified automated truck scale. Fill up with gas, and weigh the wet and loaded rig. Add the weights on the front and rear axles of the Trailblazer to get gross vehicle weight (GVW). Compare that GVW to the GVWR of the Trailblazer.
Even with a good WD hitch with sway control, and enough drivetrain to pull
that trailer over hill and dale, towing with a tow vehicle that has an overloaded suspension is dangerous. Don't do it.