Does your seat rock back and forth??

my 01 Imp front seat rocks back and forth like some spacer is out. IF I play with the power seat lever and move it around then it feels tight agian. After a little time it rocks agian. I first thought the seat was loose but it's not. I'm sure I'm not the only one with this issue.

when i come to a stop in my 00 impala i feel a slight movement, like half an inch its kinda weird.

yeah, that's it. I was at www.impalahq.com and they have a TSB on it. I've looked at it but not quite sure what I need to do. very good website for impala owners.

my impala does that on accel and when i brake doesnt bother me