Chevrolet Silverado / GMC Sierra. Manual - part 724
BRAKE PRESSURE MODULATOR VALVE REPLACEMENT (JD9, JF3, JF7)
1. Discard the EBCM to BPMV screws.
2. Install new EBCM to BPMV screws.
3. Tighten the EBCM to BPMV screws in an X pattern.
Tighten: 3 N.m (27 lb in)
2
Electronic Brake Control Module (EBCM)
Procedure
1. Disconnect the EBCM electrical connector.
2. Carefully pull the EBCM away from the BPMV. Do not force the
components apart.
3. Remove the EBCM to BPMV gasket and inspect for damage. Replace the
gasket if necessary.
4. Carefully align the EBCM and the brake pressure switch to the BPMV.
Do not force the components together.
5. Program the EBCM. Refer to Control Module References .
6. Bleed the antilock brake system (ABS). Refer to Antilock Brake System
Automated Bleed Procedure (With JL4) or Antilock Brake System
Automated Bleed Procedure (Without JL4).
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 7: View Of Brake Pressure Modulator Valve & Components
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
Preliminary Procedures
1. Turn the ignition switch to the OFF position.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
3. Remove any dirt and debris from the area of the brake pressure modulator valve
(BPMV) assembly.
CAUTION:
Refer to Brake Fluid Irritant Caution .
NOTE:
Refer to Brake Fluid Effects on Paint and Electrical Components Notice .
NOTE:
Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the
ignition switch in the OFF position. Failure to observe this precaution could result in damage to the
EBCM/EBTCM.
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
4. Disconnect the electronic brake control module (EBCM) electrical connector.
1
Master Cylinder Inlet Brake Pipe Fitting (Qty: 2)
Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination.
Tighten: 18 N.m (13 lb ft)
NOTE:
Refer to Fastener Notice .
2
Front Wheel Outlet Brake Pipe Fitting (Qty: 2)
Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination.
Tighten: 18 N.m (13 lb ft)
3
Rear Wheel Outlet Brake Pipe Fitting (Qty: 2)
Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination.
Tighten: 18 N.m (13 lb ft)
4
Brake Pressure Modulator Valve (BPMV) Bracket Bolt (Qty: 3)
Tip: It is not necessary to remove the bolts; loosen the bolts and slide the
BPMV and bracket assembly toward the front of the vehicle to remove.
Tighten: 22 N.m (16 lb ft)
5
BPMV Mounting Nut (Qty: 2)
Procedure:
If removing the BPMV bracket from the BPMV, only loosen the mounting nuts.
Tighten: 9 N.m (80 lb in)
6
BPMV Mounting Bracket
7
BPMV Assembly
Procedure
1. If necessary, remove the EBCM from the BPMV. Refer to Electronic
Brake Control Module Replacement (JH6, JH7) or Electronic Brake
Control Module Replacement (JD9, JF3, JF7).
2. Carefully lift the BPMV upward and release the BPMV from the lower
grommet. DO NOT pry on the underside of the BPMV.
3. Bleed the BPMV. Refer to Antilock Brake System Automated Bleed
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
BRAKE PRESSURE MODULATOR VALVE REPLACEMENT (JH6, JH7)
Fig. 8: View Of Brake Pressure Modulator Valve & Components
Courtesy of GENERAL MOTORS CORP.
Procedure (With JL4) or Antilock Brake System Automated Bleed
Procedure (Without JL4).
4. Calibrate the brake pressure sensor. Refer to Electronic Brake Control
Module Programming and Setup .
Callout
Component Name
CAUTION:
Refer to Brake Fluid Irritant Caution .
NOTE:
Refer to Brake Fluid Effects on Paint and Electrical Components Notice .
NOTE:
Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the
ignition switch in the OFF position. Failure to observe this precaution could result in damage to the
EBCM/EBTCM.
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado