05 DeVille Ride Height question
 

I have an 05 Deville with of course the rear air ride suspension. I am not happy with the height the car rides at. I want to raise it just a little. I read about adjusting a nut or bolt or something, but I didn't quite understand it. Can anybody give me an easy way that this can be done. Also, where would I find the ride height sensor? Thank you!