A few months back I had a guy detail my car. Kinda heavy set. Ever since then my driver's side lower seat cushion squeaks like crazy. It is coming from the raised side bolster (closest to the door). And it's not an issue of the leather rubbing an anything. It's definitely the springs inside or something. Has anybody had a similar experience?

If I drive with the radio off it is very, very noticeable going over bumps, tight turns, etc.

Turn the radio back on.
I never turn my radio off (unless I hit something)-drive by feel, not sound-

how much did this guy weigh?

take off the back of the seat (2 screw on the bottom) lube the black platic piece, that should take car of it. You may have to reroute the gray rads the balck piece clips to, also lube the spring connection points on the sides. I know it sound vague, but it will make sence once you remove the rear panel.

**I reread you post, I wrote all that for the back of the seat! For the bottom cushion check for where the leather meets the plastic on the side, you may need to put some felt on the plastic!

I had this problem as well. By slightly loosening the Torx screws that hold the front of the seat to the bar (the part that moves when the seat is raised or lowered) I solved the problem.

Gee thanks Helen Keller. I'll start closing my eyes as well.