GM 19122463
Pressure Valve

Beginning bpmv replacement requires a first step of cleaning the electric hydraulic control unit (EHCU) space to stop abs component contamination. Eliminate any dirt surrounding the ehcu before you detach the electric connector which is connected to the electronic brake control module (EBCM) . The process to disconnect the brake lines from the bpmv requires tagging and proper orderly organization of the lines. Remove the bolts holding the ehcu mounting bracket on the frame rail until the ehcu becomes accessible for removal from the vehicle. After removing bolts that secure the ehcu mounting bracket to the bpmv the next step is removing bolts from the ebcm that might require gentle force for extraction. Uses of pry tools against ebcm or bpmv are forbidden to avoid damage, while new bolts must replace all ebcm mounting hardware. The ebcm mounting surfaces must be cleaned with a new clean cloth before working with the bpmv. Install the ebcm onto the bpmv while using new ebcm bolts which need to be tightened to 5 nm (39 inch lbs.) using an x-pattern. Exclude rtv and all other sealer substances from ebcm gasket surfaces during assembly. Install the bpmv onto the ehcu bracket using new bolts that you should tighten to 9 nm (7 ft. Lbs.). Reinstall the ehcu onto the vehicle frame before tightening all ehcu bracket bolts to 25 nm (18 ft. Lbs.). The ebcm requires connection of its electrical connectors and the brake pipes need to be positioned correctly by the plastic frame bracket before they are installed onto the bpmv with fittings torqued to 25 nm (18 ft. Lbs.). Conclude the task by performing abs automated bleed procedure (W/JL4).

Remove the bolts securing the BPMV to the EHCU mounting bracket and disconnect the two-way ABS pump motor connector.