Daughter driving on concrete hi-way at 50 mph., hears noise by passenger side rear tire area. Rear end locks as if brakes were applied but were not. Car slides out-of-control. Her and her passengers are not injured. Had to shift car from forward to reverse 2-3 times, car makes clunk noise, then it frees itself she drives out of ditch. Not sure what happened they drive at lower speed cars rear end locks again for 2-3 seconds then frees itself but makes grinding noises.take to gmac service center told rear differential failed. Found out about recall: NHTSA id # 07V58900. Cadillac rep. Said our cars VIN # is not involved in recall. Found recalled VIN #'s and our cars VIN # is inside the recalled numbers bracket.

- Battle Creek, NE, USA