01 disc II SE7 Problem: ABS, Hill desent, and Traction Control light come on when brakes are applied, and low / no pedal when brakes applied with medium to hard pressure. History: Calipers, rotors, and pads replace 2 years ago with less than 12k miles put on since. Problem has just started. Local shops can't find problem, and I have check the system over. Even sprayed vaccum lines looking for a leak. Seems like booster is bad but no rust or damage seen. I have heard the problem could be air in the lines, abs module, or booster. I do not have money to burn by just throwing parts at it, so any help or guidance would be great. Thank you for your help.

 

You put 12k on in two years? Damn... I wish it was that low for me

 

I might put on 5k on my truck per year and that's if i take my road trips out west.

 

I guess I'm out of the norm, I try and put as many miles on as I can.

 

Funny Phil, you also like turning wrenches lol keep them wheels turning.

 

I HATE turning wrenches, I have better things to do.
Plus I have no patience anymore.
I do it out of necessity.

 

have you had the ABS codes check and what were they?

 

Its not my daily driver any more, my wife uses it for work, which is 20 miles round trip.

 

As for any codes, the ABS is not showing any, Which is why I dont think its the module.

 

First thing you need to do would be a full 2 quart DOT 4 brake flush after first checking your current level and check all the lines for leaks.
As for the ABS, you need to find a shop that has a scanner able to read ABS codes on your truck, few can, and they can only be read when they are on.
If you can not find a shop with a scanner, buy a 3 Amigos scanner for $200 from RSWsoultions.com and do it yourself.
If you want some help, lets talk.