OEM 2009 GMC Yukon Brake Booster

2009 GMC Yukon Brake Booster Parts and Q&A

• Q: How to replace the power vacuum brake booster on 2009 GMC Yukon?

  A: You need to apply the parking brake and exhaust the pressure in the vacuum reserve by pressing the pedal three times until it feels solid. Pull off the power vacuum Brake Booster electrical connections for dod sensor and active booster before removing the vacuum hose attached to the check valve as well as both master cylinder nuts with the original o-ring vacuum seal sticking to the master cylinder. Securely fasten the master cylinder in place using strong mechanics wire. Take out the Brake Booster pushrod retainer bolt followed by its retainer part and remove the stoplamp switch. Unplug the Brake Booster pushrod from its spot at the Brake Pedal and uninstall the Brake Booster nuts before removing the power vacuum Brake Booster along with the discarded gasket. One person should insert the new Brake Booster gasket while another helper joins in to install the power vacuum Brake Booster properly. First bolt the Brake Booster nut on its top right side then install all Brake Booster nuts to 33 nm (24 lb ft). Put the Brake Booster pushrod onto the Brake Pedal pivot pin while adding the stoplamp switch and brake pushrod retainer. Secure the retainer bolt with 10 nm of torque. Click the vacuum hose to its preinstalled check valve and join electrical wires to both the dod sensor and booster connector. Put the master cylinder back into position before tightening both master cylinder nuts to 33 nm (24 lb ft).