ok, i have a head stud kit for my 04 tahoe that was an 03 build so it had the different length head studs. now i have a 04 6L. i understand they are all the same length but are they all short or all long?

 

the main ones are all long, the little ones near the intake are the same.

 

so 20 long ones right? and aluminum blocks are 20 shorts?

 

Dont know about the alumnium blocks but the 04+ iron blocks are 20 long.

 

Well we can put this one to rest. All of them are short. Unless the two I pulled out happen to be the only short ones lmao. I pulled the front one by the exhaust mani and the front one under the valve cover behind the alternator.

 

^correct. The '04+ engines use all SHORT bolt/studs for the heads.

 

Just aluminum blocks or both iron and aluminum?

 

Both it seems. Cause mine is a lq4, all short.