Chevrolet Silverado / GMC Sierra. Manual - part 725
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.
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
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)
Tighten: 22 N.m (16 lb ft)
5
BPMV Mounting Bolt
Tighten: 11 N.m (97 lb in)
6
BPMV Mounting Bracket
Procedure:
Inspect the BPMV mounting bracket grommet for damage and replace, if
necessary.
7
BPMV Insulator (Qty: 2)
Procedure:
Inspect the BPMV insulators for damage and replace, if necessary.
BPMV Assembly
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
FRONT WHEEL SPEED SENSOR REPLACEMENT (JD9, JF3, JF7)
Fig. 9: View Of Front Wheel Speed Sensor & Components
Courtesy of GENERAL MOTORS CORP.
8
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. Bleed the antilock brake system. Refer to Antilock Brake System
Automated Bleed Procedure (With JL4) or Antilock Brake System
Automated Bleed Procedure (Without JL4).
3. Calibrate the brake pressure sensor. Refer to Electronic Brake Control
Module Programming and Setup .
Callout
Component Name
CAUTION:
Refer to Brake Dust Caution .
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
FRONT WHEEL SPEED SENSOR REPLACEMENT (JH6, JH7)
Preliminary Procedures
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation .
3. Remove the brake rotor. Refer to Front Brake Rotor Replacement (JH6, JH7) or
Front Brake Rotor Replacement (JD9, JF3, JF7) .
1
Wheel Speed Sensor Electrical Connector Clip
Procedure
1. Disconnect the electrical connector.
2. Release the wheel speed sensor electrical connector clip from the brake
hose bracket.
2
Wheel Speed Sensor Harness Clip
Procedure:
Release the wheel speed sensor harness clip from the brake hose bracket.
3
Wheel Speed Sensor Harness Clip
Procedure:
Release the wheel speed sensor harness clip from the steering knuckle bracket.
4
Wheel Speed Sensor Bolt
Tighten: 17 N.m (13 lb ft)
NOTE:
Refer to Fastener Notice .
5
Wheel Speed Sensor
Procedure:
Perform the Diagnostic System Check - Vehicle .
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 10: View Of Front Wheel Speed Sensor & Components
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
Preliminary Procedures
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation .
3. Remove the brake rotor. Refer to Front Brake Rotor Replacement (JH6, JH7) or
Front Brake Rotor Replacement (JD9, JF3, JF7) .
CAUTION:
Refer to Brake Dust Caution .
1
Wheel Speed Sensor Electrical Connector Clip
Procedure
1. Disconnect the electrical connector.
2. Release the wheel speed sensor electrical connector clip from the frame.
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado