Seat motor help

[vetteSUT]

Here's a shot in the dark. My 06 SUT, the seat will recline and do just about everything other than the bottom part of the seat will not rise or lower. And thing is, it does on the front of the seat where your legs touch the seat, but not in the back where your butt sits. It's really annoying, as I am a tall guy and feel like I am sitting on the floor. I am wondering how hard it would be to try to figure out which motor this is and replace it...

Ideas?