'01 2500 HD spongy brake pedal

[Mickeymotormount]

Hey guys. I am probably beating this topic to death around here but here goes anyway:

My 2001 2500 HD Extended cab longbed 4X4 with the 6.0 engine and 4L80E trans has been suffering what I call a spongy pedal. The truck stops fine but it just seems like it takes excessive brake pedal travel in order for it to do so. I have driven later (07 and up) 2500 HDs with the same hydro-boost setup as mine and the brakes actuate with minimal brake travel compared to my truck. The pedal feels firmer too.

I have replaced the master cylinder, hydro boost unit and power steering pump and used a scanner with an auto bleed function to actuate the ABS valves during the bleeding process. All to no avail. Still have excess travel and what feels spongy to me.

Am I missing something during the bleeding process?

Is it me or is this a common problem with the GMT 800 series line?

Thanks to all in advance.