I applaud your service ,I am a retired soldier,I have seen this post several times and have to tell you that when you get back to call the people you are/have gotten the blocks from & have them provide the info/parts you need for the lift to be completed ,thx for your question here on just answer,your GM tech-Rob-
If this info has been helpfull,please click accept so I may receive credit,positive feedback would be appreciated
Chevy Mechanic
11 yrs GM experience ,specializing in auto trans and diesel,15 yrs Canadian Military Mechanic