Avalanche 2500 4WD V8-8.1L VIN G (2003)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
W/ JL4
Antilock Brake System
Brake Pressure Modulator Valve (BPMV) Replacement (w/ JL4)
Removal Procedure
Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.
Note: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.
Important: The area around the electric hydraulic control unit (EHCU) MUST be free from loose dirt to prevent contamination of
disassembled ABS components.
1. Thoroughly wash all contaminants from around the EHCU.
2. Disconnect the electrical connector from the electronic brake control module (EBCM) (1).
Important: Make sure that brake lines are tagged and kept in order for proper reassembly.
3. Disconnect the brake lines from the brake pressure modulator valve (BPMV) (2).
4. Remove the bolts (4) securing the EHCU mounting bracket (3) to the frame rail (5).
5. Remove the EHCU from the vehicle.
6. Remove the bolts (4) securing the BPMV (3) to the EHCU mounting bracket (5).
7. Remove the bolts (1) from the EBCM (2).
8. Remove the EBCM (2) from the BPMV (3). 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.