Brake lines ? SAE, Metric, or what ?

[HDRock1]

I'm not sure I picked up the right brake lines.
What I got are called Domestic

 

[domin8]

We need more info. Who, what, where, etc. But, just so you're aware, must American cars use 1 size of brake lines, So it's not hard for the parts store to tell you which ones you need. Your main concern should be about diameter.

 

[HDRock1]

3/16 line goes across the front, from the left ,just under the evap can to the right wheel.
The ones I got say American thread, standard flare
I didn't take old one off yet.
My main concern is about the fittings on the end of the lines

 

[SunlitComet]

when you cut the old line out put the old fittings on newly shaped tube before flaring the ends.

---------- Post added at 12:56 AM ---------- Previous post was at 12:55 AM ----------

or you can buy new ones. gm 15720627

 

[Monzter Mike]

If your lines are 3/16", they will be a double flair with a 3/8"-24 thread size flair nut. If your lines are 1/4" the flair nut will be a 7/16"-24 size nut. The only place I can think that the flair nuts would be a different size at would be at the master cylinder. I haven't ran new lines to an ABS controller, so those could be a strange flair nut size like the master cylinders. GM didn't use metric lines on trucks till they went to the new body style Tahoe in 2006 & new body style truck in 2007.

 

[HDRock1]

If your lines are 3/16", they will be a double flair with a 3/8"-24 thread size flair nut. If your lines are 1/4" the flair nut will be a 7/16"-24 size nut. The only place I can think that the flair nuts would be a different size at would be at the master cylinder. I haven't ran new lines to an ABS controller, so those could be a strange flair nut size like the master cylinders. GM didn't use metric lines on trucks till they went to the new body style Tahoe in 2006 & new body style truck in 2007.

All right ! double flair with a 3/8"-24 thread size flair nut, good info, thats what I got.