what size of lugnuts do I have on my truck?

[85chevy4x4]

I have an 85 chevy 3/4 ton 4x4. I bought new wheels and tires and now the tire store needs to know what size of lug nuts I have. It's either 14mm or 9/16". Which one is it?

 

[DPI]

Should be 9/16".

 

[jekbrown]

while we're at it...lugs for 1-tons the same size?

J

 

[Triaged]

Yes...all the old 3/4 and 1-ton chevy's had 9/16 lugs.