here's how to replace faulty ABS dump valve.

[blk lt awd]

Brake Pressure Modulator Valve Replacement

REMOVAL PROCEDURE

1. Disconnect the electrical connector from the combination valve.
2. Remove the front and rear brake pipes (from master cylinder) from the combination valve.
3. Remove the right front, left front and rear brake pipes from the tube adapters.
4. Remove the four 10mm bolts that fasten the ECU bracket (7) to the vehicle mounting bracket.
5. Lift the ECU partially out or the engine compartment.
6. Disconnect the four electrical connectors from Electronic Brake Control Module (EBCM) (2).
7. Fully remove the ECU from the vehicle.
8. Remove the three alien bolts (11) from the combination valve (12).
9. Remove the combination valve (12).
10. Remove the two transfer tubes (13). Important: Do not reuse the transfer tubes. Always install new transfer tubes.
11. Remove the three 13mm bolts (9) that fasten the bracket to the Brake Pressure Modulator Valve (BPMV) .
12. Remove the four T-25 Torx bolts (1) from the EBCM.
13. Remove the EBCM (2) from the BPMV (4). Removal may require a light amount of force.

Important: Do not use a tool to pry the EBCM or the BPMV. Excessive force will damage the EBCM.

Important: Do not reuse the EBCM mounting bolts. Always install new bolts.

INSTALLATION PROCEDURE

1. Install the new transfer tubes(13) into the combination valve (12).
2. Install the combination valve (12) onto the BPMV (4).
3. Install the three alien bolts (11) that fasten the combination valve (12) to the BPMV (4). Tighten the three allen bolts to 8 Nm (6 ft. lbs.), then to 16 Nm (12 ft. lbs.) .
4. Install the EBCM gasket (3) onto the BPMV (4).
5. Insure gasket alignment is correct.

Important: Do not use RTV or any other type of sealant on the EBCM gasket or mating surfaces.

6. Install EBCM (2) onto BPMV (4).
7. install the four EBCM bolts (1).

Important: Do not reuse the old mounting bolts. Always install new bolts with the new EBCM.

* Tighten the four bolts to 5 Nm (39 inch lbs.) in an X-pattern.

8. Install BPMV (4) to bracket (7).
9. Install the three BPMV to bracket retaining bolts (9).
o Tighten the three bolts to 9 Nm (7 ft. lbs.) .
10. Connect the four electrical connectors to the EBCM (2).
11. Install the ECU to the vehicle frame.
o Tighten the three bolts to 12 Nm (9 ft. lbs.) .
12. Install the right front, left front and rear brake pipes to the tube adapters (6).
o Tighten the three brake pipe fittings to 30 Nm (22 ft. lbs.) .
13. Install the front and rear brake pipes (from master cylinder) to the combination valve (12).
o Tighten the three brake pipe fittings to 30 Nm (22 ft. lbs.) .
14. Connect the electrical connector (10) to the combination valve (12).
15. Connect the negative battery cable.
16. Bleed the brake system. Important: Verify that the combination valve metering rod is depressed during bleeding.

[blk lt awd]

here is a pic of the ABS unit......hope this helps someone else out....

[blk lt awd]

went by the dealership today.....found out raybestos was doing the reman. on the ABS units however they may no longer be available.....over the phone I was told they would be....so unconfirmed as of yet.......cost through dealer when they were available was $1600 and change. not cheap by any means......even the parts guy suggested i disable the ABS system altogether......i'm worried about getting a junk yard unit only to have it go out on my as well..... i will try calling raybestos to see if i can find anything....

[blk lt awd]

and doing more research....appears the entire assembly must be swapped out as it's only sold as an entire assembly.....so far the good news is it's still listed as an available part on the raybestos site........ here's a quick link. they have multi angle pics there to look at...

Raybestos ABS Actuator assembly

[blk lt awd]

and a live one...

[blk lt awd]

from the side...

[kings-x59]

pics didn't work, at least a far as I can see. man that seems like a complicated replacement.
post the images again, pleez. The dump valve is a main culprit in brake pedal travel before the brakes engage, like half way to the floor. VERY informative post, please continue.

[LiftedAWDAstro]

Must be on your end...the pics work for me.

[Smiliesafari]

The pics are fine here also. The exploded view is what's in the Smilie van. It has the proportioning as an integral part. The proportioning valve went bad in mine. I bought a complete ABS unit from my local salvage for $75. I had to use a pressure bleeder to get the air out of it.

[kings-x59]

I see 'em too now.