I did the shackles on my 2001. They were 9/16" I bought some grade 8 bolts.

Stock is a grade 10.9 which converts to a grade 8.

But, I remember looking at the front and I think the front spring eye has a larger bolt. I'm not 100% sure though. I can check for you tomorrow morning though if you want.

 

Thanks , if you get a chance and don'tind looking I would appreciate it . Thanks again

 

I just took a look and unfortunately I don't have anything to measure with (I'm at school and I only brought a basic set of tools) but it looks like it's 9/16 as well

It was a little hard to tell because I replaced the rear bolts with regular grade 8 bolts and the front is still the type with the non treaded tip. But the threaded area looks to be the same as the rear.

 

Thanks a lot , that helps . Fixin to go pic up some bolts today . Thanks again

 

I bought mine from mcmaster and got the zinc plated ones along with the "heavy duty" lock nuts.

I still have a few left because they came in packs of like 3 or some weird number.

 

Yeah I was gonna order but came up kinda last minute so didn't have time for slow shipping . So hopefully the hardware store ha them or I gotta go I the specialty bolt place and they have a min of $20 purchase if you come in and not order online

 

M16 X 2.0, approximately 135mm in length. About $4.50 each at the dealer.

 

I have a 01 Silv beater truck we use for work and when I bought replacement springs from ATS Springs they gave me a 5/8" x 4-1/2" bolt for the front spring eye and a 9/16" x 4-1/2" for the rear spring eye and the shackle bolt that connects to the hanger.