Rear Center shoulder belt in 2012 cruze won`t pull out of the retractor located in the upper part of the seat back. Have folded the seat back down to release any tension in the belt, and have been able to push belt in and out of retractor a few inches, but no release. Have found one earlier thread dated 2012 but nothing further. Worst case, does anyone know how to remove the rear of the seat back or whatever upholstery to get access the retractor? Thank you for any replies.