Does anyone know the spring centerbolt head size on a new Chevy?

[ZZ4x4]

On a new HD Silverado, need to know whether the rear spring center bolt head is 9/16, 5/8, or 3/4 before I take everything apart. /forums/images/graemlins/thinking.gif Anybody??
Jeff
/forums/images/graemlins/hack.gif /forums/images/graemlins/hack.gif

 

[HarryH3]

Most are round, with no hex head. /forums/images/graemlins/eek.gif

 

[ZZ4x4]

Yeah, I'm talking about the round head of the centerbolt that goes into the spring perch. Need to know to get the right lift block.