04' CC SB LE-V6 2WD I have towed a open 6X12 trailer with a fridge, couch, one loveseat, headboardt, footboard, 2 matresses, 2 box springs, two middle size armoires, one tall boy, two small end tables, one center table, ramdom stuff (vaccumm, lamps, stereo, etc) between spaces in trailer and bed.
The truck's rear end moderately lowered and was not the fastest but it did execptionally well, I was very surprised at the torque it had off the line even being loaded.