Being that I live in the northeast winter salt after 11 years have been a bit hard on the brake line of my chevy 98 2WD dually. This winter I plan on replacing all of the brake lines both the steel hard lines and the rubber flex lines.

Question 1: After much hunting around it appears that nobody makes braided flex lines for these 1 ton trucks. Earles makes a DOT flex line however only for the 1500 and 2500 trucks. Not the 3500 trucks. Is there a MFG that makes these DOT approved flex lines or am I stuck getting ruber OEM replacements? Is there a prefered brand of OEM replacement flex lines?

Question 2: What size are the brake line fittings that go out of the ABS block to the front and rear brakes. Are these fittings metric? Also are the brake lines metric? I can't really measure them because the lines are all rusted and flaking so I would achieve and accurate measurement.

I did some part number searching on NAPA's website and it appears that all the flex lines, wheel cylinder and master cylinder are typical standard inverted flares.

I'd like to have all of my ducks in a row prior to ripping everyting out.

Try classic tube for the flex lines
www.classictube.com

I was surprised to hear that Earl's does not have a hose kit for a 98 2wd dually. But i just looked in my Earl's catalog and that is indeed the case. However, they list a set, part no 28A390ERL, that covers the following:

C-2500 92-99 7200gvw
C-2500 89-92 8600gvw
C-3500 90-91 w/single rear wheels
C-3500 88-89 4X2 all

If you could compare OEM rubber hoses specific to your truck, to any of the above model ranges, and get a match, then the Earl's hose set listed should work. When i put the Earl's hoses on my 79 dually, they were identical to the OEM rubber that came off the truck. I used 28A400ERL. Some cross checking with the rear hoses on my 85 cucv Blazer and 02 one-ton Savana indicates that the rear hose in 28A400ERL would work in all three. You may have similar luck.