Body Mount Bolt Size

[daylower]

I searched for this and didnt find anything, so here goes...I have an 09 Sierra CC, and was looking to install my newly purchased raptor nerf bars but upon inspecting the mounts I noticed I dont have a wrench/socket size that fits that bolt. I was wondering if any of you knew what size it may be so I know what size wrench/socket to get. I know its bigger than a 3/4 but smaller than a 7/8 and the no 22 wrench I have seems a tad too big as well. Any suggestions?

[ss502gmc]

I searched for this and didnt find anything, so here goes...I have an 09 Sierra CC, and was looking to install my newly purchased raptor nerf bars but upon inspecting the mounts I noticed I dont have a wrench/socket size that fits that bolt. I was wondering if any of you knew what size it may be so I know what size wrench/socket to get. I know its bigger than a 3/4 but smaller than a 7/8 and the no 22 wrench I have seems a tad too big as well. Any suggestions?

How bout a 13/16" or a 21mm

[daylower]

thanks, i'll give those a try...my sockets only go up to 3/4 and 19 and my wrenches jump from 19 to 22. Go figure.

 

Edit: it was a 13/16" thanks a ton

[tramz]

I thought that was a test!