remove seats in '00 silverado.

I need to take out my seats in my 2000 Silverado. Ive never seen a nut that looks like that. What is name and size of the bolt? What type of socket will i need to unbolt the seat? Can I get this at an autoparts store or is it a dealer item?

i used a regular socket and made sure it was snug and it came right out. i never looked for anything different. i think it may have been a 15mm but its been a while since i took them out.

i used a regular socket and made sure it was snug and it came right out. i never looked for anything different. i think it may have been a 15mm but its been a while since i took them out.


Just tried a 15mm deep socket. It worked!! Thanks!!!

From the shape of the nut id never would have guessed a metric socket would fit.