Service Procedure

1. Disconnect the negative battery cable.

Important
Thoroughly remove all loose dirt and/or contaminants from around the Electro-Hydraulic Control Unit (EHCU) to prevent contamination of disassembled ABS components.

2. Disconnect the two electrical harness connectors from the Electronic Brake Control Module (EBCM).

3. Disconnect and identify the location for assembly purposes, the five brake lines from the BPMV.

4. Remove the bolts securing the EHCU mounting bracket to the vehicle.

5. Remove the bolts securing the EHCU to its mounting bracket.

6. Disconnect the 2-way ABS pump motor electrical connector.

7. Remove the T-25 TORX screws securing the EBCM to the BPMV.

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

8. Remove the EBCM from the BPMV and discard the BPMV. Removal may require a light amount of force in order to separate the units.

9. Clean the EBCM to BPMV mounting surfaces with a clean cloth.

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

10. Install the EBCM onto the new BPMV and hand start the four T-25 TORX screws.

Tighten

Tighten the four T-25 TORX screws to 5 N.m (44 lb in) in an X pattern.

11. Connect the 2-way ABS pump motor electrical connector to the EBCM.

12. Install the EHCU to its mounting bracket and hand start the bolts.

Tighten

Tighten the EHCU to bracket bolts to 9 N.m (80 lb in) in an X pattern.

13. Install the EHCU and the bracket assembly into the vehicle.

IMPORTANT
If the brake pipes are retained by a flame mounted plastic clip, ensure that the pipes are positioned in the clip properly.

14. Connect the five brake pipes to the BPMV.

Tighten

Tighten the pipe fittings to 30 N.m (22 lb ft) in an X pattern.

15. Connect the two electrical harness connectors to the EBCM.

16. Bleed the brake system.

17. Connect the negative battery cable.

18. Install the GM Campaign Identification Label.