Lumina V6-3.1L VIN J (2000)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
ABS Motor Pack Replacement
Removal Procedure
1. Remove the gear cover (3). Refer to Modulator Gear Cover Replacement.
Important: Use care when handling the motor pack to avoid damaging the motor pack connector. Make sure brake fluid does not accidentally intrude
into the motor pack. Brake fluid in the motor pack may cause a premature failure of the motor pack.
Important: Use care when handling the motor packs. Replace the motor packs if the motor packs are dropped or damages during handling.
2. Remove the four Torx head screws (5) that attach the motor pack (1).
3. Remove the motor pack assembly (1).
Important: If the disassembly of the modulator/master cylinder assembly was caused by an ABS hydraulic functional test that did not pass, the
Automated ABS brake motor pack Diagnosis Test should be performed. Refer to Scan Tool Diagnostics in Antilock Brakes. The Automated ABS
brake motor pack Diagnosis Test isolates the motor pack or brake modulator.
No repair of the motor pack is authorized. Replace as an assembly.
Installation Procedure
1. With either of the modulators positioned upside down, rotate each ABS brake modulator gear counterclockwise until movement stops.
