Moving / sliding front seats?!

["Big Blue"]

Hello,
I have a 2000 GMC Yukon SLT and have noticed that both of my front chairs will slightly slide forward (about an inch) when breaking. It started with my passenger seat and now the driver will do it sometimes as well. I have no idea on what it could be. Could the motor be dying and allowing it to move? I tried to check for any loose screws or anything that would result in this happening, and I didn't really come across anything. This is not a major concern, but it will sometimes freak out whoever's riding shotgun
Has anyone had this happen? Or any ideas on what it could be?
Thanks!

 

[GeneralNoobzor]

Now that you mention it, my seats did use to do this... Not sure what it was, doesn't do it anymore though. Let me know if you find anything.

 

[Alex33]

Does the seat bottom or seat back do this?

 

[GeneralNoobzor]

Seat bottom.

 

["Big Blue"]

Yes, it is the seat bottom but it is the entire seat itself that will shift. My driver's seat now moves even more. I tried looking to see if something was loose but I could not really tell. Sorry for the late response I've been away for awhile.

 

[BarryD0706]

In case anyone is still looking for a solution to this, I've posted a YouTube video that shows how to fix many instances of this. Check it out: http://youtu.be/sOjivYnXMAQ

 

[notinparadise]

Lifesaver, even know it will take me a hour to fix the movement is a PITA!!!