GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Hydraulic Brake System Diagnostic Check performed?

--

Go to Step 2

Go to Hydraulic Brake Diagnostic System Check

2

Inspect the following power steering system components for comtamination:

    • Power steering gear
    • Power steering pump
    • Hydraulic brake booster
    • Power steering hoses

Is the power steering system fluid contaminated?

--

Go to Step 3

Go to Step 4

3

  1. Flush the power steering system. Refer to Power Steering System Flushing in Power Steering System.
  2. Replace the hydraulic brake booster. Refer to Power Brake Booster Replacement .

Is the repair complete?

--

Go to Step 6

--

4

Check the hydraulic brake booster to power steering pump hose for the following:

    • Kinks
    • Sharp bends
    • Restrictions

Do any of the above conditions apply?

--

Go to Step 5

System OK

5

Reroute or replace the hose. Refer to Power Brake Booster Inlet Hose Replacement or Power Brake Booster Outlet Hose Replacement in Power Steering System.

Is the repair complete?

--

Go to Step 6

--

6

Verify proper brake system operation.

Does the original condition still exist?

--

Verify customer complaint. Begin the diagnosis again. Go to Step 1

System OK