1994 GM sits higher on left rear than right rear?

Hello,
My 1994 Grand Marquis sets level left to right in the front, but the left rear is almost 2 inches higher than the right rear (as measured from ground to top of outside wheel well). No air ride, and coil spring, and spring seats look fine (not deteriorated). Can a bad shock cause this? Could one spring be worn more than the other?

Thanks

It has to be either the spring or shock. More than likely the shock. Look closely at the spring though. They can break and not really be seen if it is broken at the end.