This thread has some info:
Hey everybody, new to the forum. long tim lurker of the older sites like trailvoy. But i found these: bilstein shocks and could any body tell me if i could use these in the front in combo with mark Mc's 3" suspension lift? i drive a 2003 Trailblazer EXT 4.2 4wd
gmtnation.com
So those 5100 struts and shocks would work well for you however those rears, by themselves, will not lift lift it. Maybe
@HARDTRAILZ can chime in but I think just a spring swap may work to bring the rear up the 1/2 to 1" you're looking for. There's also
@wstuckey1 that has lifted his EXT and may be able to offer some advice.
Also moved this thread to the proper section.