I have purchased a used 1988 Jayco JayKing 6 Tent Camper. It is large for a tent camper (13'7" box) but only weighs about 2300 lbs (or less) when loaded. I pull it with a 2002 Tahoe. The camper has new "C" rated wheels that are the smaller-type wheel you see on most large tent campers. They are not radials (I have been told radials are not available). The front of the trailer rides very slightly downward when attached to its hitch. The trailer did have a three inch lift installed several weeks ago - but the problem noted below existed before the lift was installed. The trailer has a torsion axel suspension (no springs). Although the camper generally pulls very well, I have become increasingly worried about the amount of wagging that I get when making even small adjustments to the Tahoe's steering wheel or especially when passing or getting passed by tractor-trailors on the interstate. When I say "wagging," I mean that the camper continues to wobble back and forth for 4 or 5 seconds after I make a steering adjustment. Although the Tahoe is heavy, I can feel the trailer trying to push the back end around. The problem gets significantly worse the faster I go. It is relatively unnoticable at 55 mph, a significant problem at 70 mph, and unsafe at 80 mph. Wind harshly exaggerates the problem. Any suggestions on what could be making such a relatively light trailer wag around so much? Could it be the trailer's wheels? Could it be my Tahoe's wheels (factor original 265/70 R16 Firestones)? I have never seen a tent camper with sway bars on the tounge and hitch -but will I be forced to go that route? I would greatly appreciate any advise!!!