Chalk up another win for the clamps fix. Bought 2x 1" hose clamps and 2x 1" rubber insulated clamps from Lowes. removed the rubber from the insulated clamps, trimmed it down to 3/4" and slid it on the hose clamp. Installed them tight up against the inside of the white clips under the seat. Problem solved. Took me longer to buy the bits inside Lowes than it did to install. Source fix, as mentioned before is on page 19
http://www.gm-trucks.com/forums/topic/154219-seat-movement-issues/page-19