you will have lights in the dash. If you dont want any lights heres what id do.
front you can ditch the spindles and do the 3 inch control arms
in rear the belltech kit for 250 and run no spacers and then you shorten the autoride links
then in rear run the djm hardware kit to relocate the axle/swaybar links.
This way autoride still works and you can load the back of the truck up.
so djm 3 inch a arm kit front $430
rear djm hardware kit $165
rear trailblazer springs $170
rear short poly bumpstops $30
you will also need to cut off the rear bumpstop brackets
look here
http://www.djmsuspension.com/Articles new/FreeTravel.html
Also djm never was able to test the arms on 4x4 trucks so they say 2wd only. The kits ive been installing since late 06 on 4x4s with no issues at all.
Your truck looks like it sits a little higher in front so wiht the a arms in front with stock spindles and rear the kit above you will be good to go and wont have lights showing.