Hydraulic Control Assembly - Antilock Brakes: Service and Repair

EBTCM/BPMV Assembly Removal:

REMOVE OR DISCONNECT
1. Battery negative Cable.
2. Air cleaner assembly arid Powertrain Control Module (PCM) cover.
3. Electronic Brake/Traction Control Module (EBCM/EBTCM) harness connector and Brake Pressure Modulator Valve (BPMV) motor ground cable connector.
4. Brake pipe fittings. Note location of brake pipes for aid during installation. When removing the brake pressure modulator valve, protect vehicle exterior from possible brake fluid spillage. Reposition brake pipes as necessary to remove brake pressure modulator valve. Excessive bending may cause damage to the brake pipes. Clean any brake fluid spillage from the brake pressure modulator valve.
5. EBCM/EBTCM bracket and mounting bolt.
6. Upper BPMV bracket from frame rail.
7. EBCM/BPMV assembly from vehicle.
8. Four EBCM/EBTCM to BPMV bolts.
9. Separate EBCM/EBTCM from BPMV, by pulling rearward until separated.

CAUTION: Do not pry EBCM/EBTCM. Be careful not to damage seal (if reusing module). If seal is damaged during removal, repair damaged area using GM P/N 123456739 silicone sealer or replace EBCM/EBTCM.

INSTALL OR CONNECT
1. EBCM/EBTCM to BPMV. Clean EBCM/EBTCM seal and BPMV gasket surface with alcohol. Tighten Four mounting bolts to 4.5 Nm (40 inch lbs.). Center bolt with bracket to 14 Nm (10 ft. lbs.).
2. BPMV bracket to BPMV. If a new brake BPMV is being installed, remove shipping plugs from valve openings.

CAUTION: Make sure brake pipes are correctly connected to brake pressure modulator valve. If brake pipes are switched by mistake, wheel lockup will occur and personal injury may result. The only two ways this condition can be detected are by using a Scan Tool or by doing an "Antilock" stop.

3. EBCM/BPMV assembly into vehicle. Tighten Frame-rail bracket bolts to 12 Nm (106 inch lbs.).
4. Brake pipe fittings. Use locations noted during removal. Tighten Brake pipe fittings at Brake Pressure Modulator Valve to 18 Nm (13 ft. lbs.).
5. EBCM/EBTCM harness connector and motor ground cable connector. Lock Tab.
6. Air cleaner assembly and PCM cover.
7. Battery negative cable.
8. Fill and bleed hydraulic brake system. Service and Repair
9. Perform Auto Bleed Procedure. Auto Bleed Procedure
10. Perform ABS/TCS Functional Check.