72 Sierra Grande Brake ?
 

Afternoon Guys I'm running new Brake lines up front on my 72 GMC half ton 3/16 Brake line I went to my local NAPA store I got 2 front hoses, line size 3/16 one hose is a 3/8 tube nut the other hose is a 7/16 tube nut counter guy couldn't tell me why I have 2 different size tube nuts any body tell me why Thanks

Re: 72 Sierra Grande Brake ?
 

From checking the parts on rock auto they left and right lines are different sizes. I couldn’t tell you why. I haven’t paid attention to what’s on my truck as it’s been so long ago that I replaced mine

Re: 72 Sierra Grande Brake ?
 

They are indeed side specific:

https://store.fillingstation.com/det...KE_HOSERT.html

https://store.fillingstation.com/det...KE_HOSELF.html


https://store.fillingstation.com/ima...ge/fs-628l.jpg
Orig GM part numbers:

LEFT-6274063, 6264063, 6262737 3993921

RIGHT-6274064, 6264064, 6262738, 3993922

Re: 72 Sierra Grande Brake ?
 

Morning Guys Thanks for your response so the 3/16 brake line tube nut size 7/16 goes on the left side front and 3/16 line tube nut size 3/8 goes on the right side why did the factory do that would it effect the braking? Thanks again