Steering sometimes a bit light

WD seems good. Is the trailer nose high when hitched? Should be level or just a bit lower that the rear.

What kind of tires do you have? Are you running original shocks? Checked ball joints and tie rods?

Your FWW is back to original so thats spot on. You're trucks level so thats good.
How is the TT for level or parallel to the ground?
Whats your tire PSI on the TT and truck?
Other than maybe the short WB of the truck everything looks good to me.

You need to transfer more weight foreword. Your towing nose high.

Thanks for the responses! Here's a bunch more info:

TOW VEHICLE:
2011 Chevy Silverado 1500 2WD Ext Cab
5.3 V8, 6 speed transmission, HD Trailering Pkg.and suspension

TRAILER:
2018 Jayco Jayflight 265RLS (31')
Loaded weight aprox. 6500
Tongue weight (including WD Hitch) aprox. 800

WD/anti sway HITCH:
Fastway E2 92-00-1000 Trunnion Type(rated for up to 10,000)

MEASUREMENTS:Truck Front Wheel Well, Rear Wheel Well
UNLOADED-FWW=36 1/4" RWW=38 1/4"
TRAILER HITCHED WITHOUT WD BARS-FWW=36 7/8" RWW=36 1/4"
TRAILER HITCHED WITH WD BARS IN PLACE-FWW=36 1/4" RWW=36 5/8"

Sounds like you need to transfer more weight to the front end of the TV. Measure front end height at the wheel well both hitched and unhitched. The difference should be minimal, like a half inch or less.

goducks10 wrote:
You need a front spoiler on your tow vehicle. The faster you go the more down force to the front end.

Or possibly one at the rear. Is the front of the TV getting lighter because the front of the trailer is seeing more down force?

You need a front spoiler on your tow vehicle. The faster you go the more down force to the front end.

Need more information and weights. I would immediately guess that your unloading the front end when hitched.

Knowing what vehicle were talking about would help.