I have noticed that the rear of my 03' sits higher than most other 1st generation Sequoias. I would like to lower it a bit (2" or so) if possible. Any suggestions?

Do you have the automatic height control option?

No, not to my knowledge. It is the standard SR5 series.

If you bought it used, maybe the PO installed airbags. Look in the rear coil springs and see if they have air bags. If so, trace the tubing back to the valve stem where the bags are inflated.