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Easy to lose interest when you aren't making any progress.

Interestingly enough, I don't hear air blow off when I work my brakes. Mine seem to work ok.

Yeah got it. I keep forgetting he has the short style.

There is a 1/8" npt plug on the air cylinder cap. Remove the plug, thread in a nipple, attach a length of hose to it with an air pressure gauge if you have one. Let the truck build air while you are in the cab and then press on the brake pedal and see what the gauge reads. Kind of sounds like...

Hah, you got all three of us on this thread like flies on a fresh turd now.

If you have good pedal then it isn't an issue with air in the lines. You still have an air pack malfunction.

And you bled the front two wheels in the wrong order...

So you still aren't getting any pedal at all?

You'll have to completely flush your brake system every year now you know. Have you built the pressure bleeder linked in the previous posts yet and used it? When you crack the bleed screw on the airpack do you get a good stream of fluid flow from it?

Yeah you guys both still have air in there somewhere. As Welldigger said, bench bleeding will do nothing to help you. You bleed at the airpack first, then right rear wheel, left rear wheel, right middle wheel, left middle wheel, driver front wheel, passenger front wheel. It also helps to use the...

If you don't bleed it correctly you will never get the air out.

Couldn't hurt. Sounds more like hydraulic issues to me though. That's what mine was doing last week when I had to change my leaking master cylinder. And every once in a while I'll get some fluid seepage into the air side of the air pack and it'll cause a good pedal with poor stopping power. I...

There is a small plug on the back of the air pack facing the spare tire. It may be an Allen plug or a square head plug, I believe 1/8" npt. Pull that plug and step on and hold the brakes after you've built air pressure. See if brake fluid sprays out and covers the spare tire.