Sourced ‘em today from our local Penske GMC dealer. Less than $100 OTD.
Included plastic ‘rivets’ for our predrilled fender lips and self-tapping screws for their four other (each side) mounts.

Cleared my previously fitted Husky mud flaps nicely. The ~20 minute installation -working at a leisurely pace- is more rewarding than painting IMHO.




^ Never mind the lousy pictures and stock ride height lol.

 

Damn those look very nice!!!

 

I did this too, removed rear block to help level it out some and put the rear wheel liners in
local dealship matched gmpartsdirect
before


after

 

+1
Can confirm that PN 15002781 U-bolts are indeed the correct replacements to retain ‘OE appearance’ underneath when ditching the blocks.

 

Good thread!

I am about to remove my rear blocks on my 09 Z71 Silverado and looks like the NNBS guys can use the stock hardware (though it might look weird with all that thread hanging out) and the NBS guys had to use washers or new bolts 15002781.

Also seems like the NNBS are dropping the rears about an inch which will not level the truck but it does help get close.

 

Hmmm.....doesnt look lowered at all...mine does tho.

 

2 inch rear lowering shackles from Oreilly....it works pretty damn good.

 

Just removed my blocks. 09 ecsb z71 4x4. I used one flat washer above each nut just because the original u bolt thread was close to bottoming out. For 20 cents a piece it was worth it.

Before measurements:
Trailer hitch = 19 1/4
Right rear = 38 7/8
Left rear = 38 3/4
Right front = 36
Left front = 35 3/4

After:
Trailer hitch = 17 3/4
Right rear = 37 3/4
Left rear = 37 3/8
Right front = 36
Left front = 36


I left the level in the same spot
Before



After