GM 15274841
Modulator Valve

Always verify that the ignition switch shows OFF before working on the ABS Control Module wiring harness to avoid ABS Control Module/EBTCM harm. The first step involves dismounting and placing aside the transmission control module (TCM) when present. Clear all visible dirt from the surroundings where the ABS Control Module and brake pressure modulator valve (BPMV) connect. Disconnect the ABS Control Module electrical connector together with the pump motor electrical connector. Unscrew the ABS Control Module attaching screws before using caution to remove the ABS Control Module from its position beside the BPMV. Before ABS Control Module installation to BPMV clean denatured alcohol must be used with a clean shop cloth to prepare the sealing surface. Next apply the ABS Control Module to the BPMV. Fasten the ABS Control Module-to-BPMV attaching screws with a 3 Nm torque setting while following a cross pattern approach. The pump motor electrical connector along with the electrical connector must be connected to the ABS Control Module. Move the TCM to its mounting bracket before switching the ignition to ON and avoiding engine start. Conduct the Diagnostic System Check - Vehicle in Vehicle DTC Information through the last step of the procedure.

The ABS Control Module remains protected from damage when connecting or disconnecting its wiring harness connector because the ignition switch must be set to OFF position. First remove the Transmission Control Module from its mounting bracket when present and place it away for safekeeping. Wipe away all dirt and debris from the ABS Control Module-to-BPMV mount area. Remove the electrical connector wires from both the ABS Control Module unit and pump motor electric unit. The BPMV process starts by unscrewing the ABS Control Module mounting screws then slowly moving the ABS Control Module away from the modulator. The BPMV requires cleaning with denatured alcohol and a clean shop cloth before positioning the ABS Control Module onto its surface. Screw the ABS Control Module-to-BPMV attaching screws in a cross pattern while torquing them to 3 Nm (27 inch lbs.). The ABS Control Module requires reconnection of its pump motor electrical connector and electrical connector. Place the TCM on its mounting bracket and activate the ignition switch to the ON stage without starting the engine. Conduct the Diagnostic System Check - Vehicle in Vehicle DTC Information as the last step.