Joisey

I undercoated the first set of FineLine "lifetime" brake lines when I was sure there were no leaks. Four years later they ruptured at the weld line. One front driver's side and the main line feeding the rear brakes. GM said there is no trouble with their brake lines, but on new trucks they are plastic coated, just like the two lines going to my rear wheel cylinders on my 2006 Sierra. I would have tried the 'print screen' idea, but alas, I have no MS paint.

I'm glad that the diagram helped you. I used the FineLines replacement lines the first time. My original lines lasted 84K and I replaced them when they began to weep. The FineLines lasted 36K and rusted thru. My current set is made by Dorman and is stainless steel. Fit is excellent, but I will never know how they last because the truck is going down the road. Enough is enough. Again, I am happy that the diagram helped you.

https://www.safercar.gov/staticfiles/safercar/pdf/EA11-001_closing_rpt.pdf I found this picture by accident after three hours of searching for a picture of the routing for the steel lines for my 2006 GMC Sierra 4wd. Most other GM trucks would be the same or very similar. I cannot find a way to post just the picture. Open the link in Adobe Acrobat and go to page 14. You can blow up the picture in Acrobat, around 300 % gives you a clear easy to read picture. lines run in order, from inside edge of frame (in plasic clips) or top edge of frame (in plastic clips) outward or downward. If you run your lines in this order there is no crossing or bending of lines necessary. Antilock brake ports: 1. top center port to right front brake 2. top left port to left front brake 3. top right port to rear brakes (actually, this line runs in it's own clip 4. bottom left port to master cylinder rear port 5. bottom right port to master cylinder front port