Bleed ABS Module ?

How to bleed the ABS module on 92 Oldsmobile Bravada ?

Leaky brake line drained the system and ABS doesn't work now.
Multiple brake pedal stomps after the recent snow event failed to activate the ABS.
Accessing the ABS by way of the Diagnostic Link (OBD1 connector) make the ABS pump "grunt" then goes back quiet.
Opening the bleeders on the module and pumping the brake pedal does nothing.