With 3.8L, tow about 3500 lbs, 1000 mi/yr, for the last 11 years. GVW probably 8700 lbs occasionally. Travel both interstate and hilly country roads. Although I've never had a problem, it is at the edge, or beyond the equipment's capabilities IMO. I use a lot of caution. I believe that the brakes and transmission are weaker links than the engine. When there are more than three of us, we'll usually take a second vehicle just to lighten the load.

I had a 1999 3.3L (I think, not a 3.8 for sure) with a towing package that came with a bunch of heavy duty stuff and was rated for towing 3500 lbs. That engine struggled a lot more than the 3.8L.