Auto Bleed Procedure

The Auto Bleed Procedure is used to provide a complete brake system bleed on DELCO Bosch 5 equipped vehicles. The procedure cycles the system valves and runs the pump to purge air from secondary circuits normally closed off during non-ABS/TCS/ICCS mode operation and bleeding. It is to be used when it is suspected that air has been ingested into the systems secondary circuits, or when the Brake Pressure Modulator Valve (BPMV) has been replaced. To perform this procedure successfully, the following are required:
- Scan tool.
- A pressure brake bleeder capable of producing at least 30 psi. with suitable adapters and filled with DELCO Supreme 11 brake fluid or equivalent DOT 3 brake fluid obtained from a sealed container.
- A hoist, or suitable stands to support vehicle.
- A bleeder bottle to receive vented brake fluid. The bottle should be constructed of unbreakable plastic, and should have a clear plastic hose sized to fit snugly on the bleeder valves. The hose should protrude into the bottle, with its end immersed in brake fluid.
- An assistant to pump the brake pedal during the procedure.
- Suitable safety attire, including safety glasses.