OEM Chevrolet Malibu Brake Booster

Chevrolet Malibu Brake Booster Parts and Q&A

• Brake Booster
  15235135
  Q: How to service and repair the vacuum brake booster on Chevrolet Malibu?

  A:

  You should start the vacuum Brake Booster service and repair by taking off the air cleaner assembly. Take off the underhood junction block bracket before separating it from the block. Pull out the master cylinder from the booster while keeping the insulator safe between the front of dash and the booster. Disengage the vacuum hose from the vacuum check valve then take off the left sound insulation module. Tilt the vacuum booster slightly while rotating the booster pushrod off the pedal clevis pin instead of using excessive side pressure. Settle the new booster in position then connect the booster pushrod to the Brake Pedal . During setup gently move the booster to line up the pushrod with the pedal then press and fit them together. Use 27 nm torque to fasten the booster to Brake Pedal nuts before putting back the left sound insulator. Attach the vacuum hose to the vacuum check valve before placing the master cylinder onto the booster and tightening both nuts to 27 nm (20 ft. Lbs.'). Reposition the underhood junction block bracket, underhood junction block, and air cleaner assembly.
• Brake Booster
  25778605
  Q: How to replace the Vacuum Brake Booster (ABS) on Chevrolet Malibu?

  A:

  To change out the vacuum Brake Booster (ABS), proceed by turning the ignition to the off position, in order to avoid damaging the ebcm/ ebtcm by unplugging the wiring harness. Raise and support vehicle and remove left front tire and wheel assembly. Remove the 3 nuts that hold the electronic brake control module (EBCM)/brake pressure modulator valve (BPMV) bracket to the left front wheelhouse and lower the vehicle. Disconnect the electrical connector from the ebcm, then drain the vacuum off from the vacuum Brake Booster using the vacuum check valve from the vacuum Brake Booster grommet without disconnecting it from the vacuum brake hose . Remove the 4 brake pipes out of the bpmv using the bleeder valve caps for avoiding any loss of fluid and contamination. Next, remove the terminal nut from the wbrake booster followed by ebcm/bpmv bracket assembly with the brake master cylinder. Remove the close out panel together with the electrical connector of the brake apply sensor, then unscrew the 2 Brake Pedal assembly to cowl mounting nuts. Remove the Brake Pedal pushrod retaining clip, wave washers, and Brake Booster pushrod from the Brake Pedal pin so as to tilt the vacuum Brake Booster and just work the booster pushrod off the pin applying excessive side pressure. You'll need to take the booster off the vehicle. For installation positioning, place the booster back into the vehicle, tilting it slightly so that the side with the pushrod and booster is consistent with the Brake Pedal pin, and the fixation clip , wave washer , pushrod are fixed to the pin. Secure the 2 Brake Pedal assembly onto cowl mounting nuts and tighten to 15 nm (11 ft. Lbs.). Connect the brake apply sensor's electrical connector, reinstall the closeout panel, as well as attach the ebcm/bpmv bracket assembly and master cylinder to the vehicle. Torque the master cylinder nuts to the vacuum Brake Booster, which are recommended to be 25 nm (18 ft. Lbs.), while ensuring the fitting of gasket on the master cylinder is intact. Lift the vehicle once more, mount the 3 nuts that attach the ebcm/bpmv bracket assembly to the left wheelhouse and tighten them to 10 nm (86 inch lbs.), and reinstall the left-front tire and wheel assembly and lower the vehicle. Then, remove the caps from the 4 brake pipes and connect them to the bpmv, tightening them to 20 nm (15 ft. Lbs.). Connect the electrical connector back to the ebcm and the vacuum Brake Booster check valve back to the vacuum Brake Booster grommet. Lastly, bleed the hydraulic brake system and dial in the Brake Pedal position sensor.