I'm sorta curious if anyone else has ran across this before.. I did a search with nothing relevant. In my 86 GXL, I have a pair of S5 (unknown exact year) GXL seats. When I installed them, I of course made sure the 4 corners holding the seat to the car were tight, but they rock back and forth a bit, and it's annoying. I'm sure it's nothing hard to tighten up, and until now it has been rather low on my list of things to fix, but since I'm bored and sitting in a hotel in Alabama, I'm going to see if anyone else has had this problem, and how you fixed it?

 

Slider to seat bolts?

I'd personally have someone sit on the seat and tighten it down.