Q: Under what circumstances can the two-person bleed procedure be used?
A:
When installing a new electro-hydraulic control unit (EHCU) or new brake pressure modulator valve (BPMV) and the air is trapped in the valve body.
By Bob
GM Specialist
28/10/2022
Q: What should I avoid doing during the automated bleed procedure?
A:
You can not drive the vehicle until the brake pedal feels firm and reuse brake fluid that is used during bleeding.
By Bob
GM Specialist
28/10/2022
FAQ for Other Repair Info
Q: What is the removal procedure for the leading/trailing drum brakes?
A:
You need to remove the shoe and linings, clean the dirt and foreign material from around the Wheel Cylinder, remove the inlet pipe, plug the pipe to prevent fluid loss and contamination, and remove the bolts and the wheel cylinder.
Q: What is the proper way to install the vacuum brake booster hose?
A:
The proper way is to route the hose in the same position as it was prior to removal and install the hose to the fitting on the engine and the hose to the fitting on the Brake Booster.
Q: How do you remove the hydraulic booster?
A:
You need to apply the parking brake, disconnect the brake pipe and plug the pipes to prevent brake fluid loss or contamination, and then remove the master cylinder nuts, the bracket, and the master cylinder.