Broken seat
The "seat twisting" problem is different to the normal rocking seat fix
One side of the seat back seems to give way and won’t support your weight causing the seat to "twist".
It’s an easy procedure and worth trying before replacing cables.
Adjust the unoccupied seat to the fully forward position
Recline the seat to the fully rearward position and release the recliner handle to lock the seat back
Release the unoccupied seat to the fully upright position and release the recliner handle to lock the seat back. This will allow both the outboard and the inboard recliner mechanisms to release and resynch to the fully upright position
Check the seatback recliner mechanism for resynchronization by applying pressure with your hand to the headrest.
There’s a TSB published which covers the problem:
http://www.corvetteactioncenter.com/...ck+Recliner%29








