91 PA ABS bleeding procedure

[ZiggyPA]

I have had the brake lines replaced but the pedal feels spongy to me.
I'm guessing there is air in the ABS pump. The shop bled the system just by pressurizing it.
What is the proper procedure for bleeding a 91 ABS pump w/ traction control?
The ABS and traction lights are off btw.

[maxwedge]

Many time a bi- directional scanner is needed to activate the solenoids to purge the abs unit.

[gmtech1]

This is the manual procedure, not the pressurized procedure...