found a real nice class 3 hitch at the boneyard today. $9. i did not have tools to remove it. the hitch mount bolts to the bottom of the frame rails. 2 large 1" nuts on each side. i cannot see any access thru the sides of the frame rails. i wonder how the bolts were inserted during install? the bolts are about 6-7" apart. i cannot imagine a U-bolt style setup here? its a gm newer car. pretty sure this model never came from factory with hitch installed. will check it out tomorrow.