GM 20896914
Control Module

The first step to replace an ABS Control Module (ABSCM) requires setting the ignition switch to OFF to avoid damaging both ABSCM and EBTCM units. The technician should elevate the vehicle for maintenance before they disassemble the ABS module splash shield retainer system and then remove the splash shield itself. First clean the ABSCM alongside the brake pressure modulator valve (BPMV) before disconnecting the ABSCM electrical connector. Turn down the ABSCM bolts but keep them in place before slowly pulling the ABSCM in an even manner away from the BPMV to detach the electrical connectors. Unfasten the ABSCM bolts before extraction of the ABSCM unit. Position the ABSCM at the BPMV and verify its alignment before tightening the ABSCM bolts in an X pattern to 3 Nm (27 lb in). After connecting the ABSCM electrical connector it should be followed by ABSCM programming and sensor as well as boost valve calibration and ABSCM learn procedures when installing a new ABSCM. To complete the repair install the ABS module splash shield taking care to fasten it with bolts that should be tightened to 20 Nm (15 lb ft) then install the splash shield retainers.

Initiating ABS Control Module replacement requires placing the ignition switch at OFF while then raising and supporting the vehicle. Raise and support the vehicle. First remove bolts and retainers of the antilock brake system (ABS) module splash shield. Then remove the splash shield itself. The ABS Control Module requires cleaning from all dirt and debris and the brake pressure modulator valve (BPMV) needs also to be cleared of all contamination. Separate the ABS Control Module electrical connector first and then loosen but not remove the ABS Control Module bolts. The process entails directing the ABS Control Module at an even pace to remove electrical connectors from the BPMV before uninstalling both ABS Control Module bolts and the ABS Control Module. Begin ABS Control Module installation by placing this component straight onto the BPMV. Mount the ABS Control Module bolts tests in an X pattern while setting torque to 3 Nm (27 lb in). Connect the ABS Control Module electrical connector. A new ABS Control Module requires programming before installation and additional procedures for sensor and boost valve calibration and the underlying ABS Control Module learn features must be performed. Complete the installation by installing the ABS module splash shield and attaching its retainers after securing bolts at 20 Nm (15 lb ft).