[Prerunner1982]

I am not sure if there is a difference between 3/4 ton and 1 ton/diesel coils... if there is you might as well go with the 1tons...

I have HD front coils which I believe to be 1ton/diesel coils and it leveled my truck out front to back...the back is still stock. So I would say it gave me 1-1.5" of lift.

However from the pictures it appears you suburban already sits pretty level. Maybe it is just the perspective of the camera..... but it looks like the back end does not sit higher than the rear as a truck normally would. It is pretty typical of a Suburban to sit with it's rear lower.. If you put HD coils in the front you might end up with the front higher than the rear...