GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Aurora 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Pedal Excessive Effort

Step

Action

Yes

No

1

Did you perform the Brake System Diagnosis?

Go to Step 2

Go to Diagnostic System Check - Hydraulic Brakes

2

Inspect the brake pedal assembly for the following:

    • Bent or misaligned components
    • Binding or interference between the pedal and booster input rod

Are the components misaligned or binding?

Go to Step 3

Go to Step 4

3

Repair or replace the cause of misalignment, interference or binding.

Did you complete the repair?

Go to Step 14

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4

Inspect the brake linings for the following:

Refer to Brake Pad Inspection in Disc Brakes.

    • Excessive wear
    • Uneven wear
    • Abuse
    • Glazing
    • Contaminated lining material
    • Incorrect lining material

Do any of the above conditions exist?

Go to Step 5

Go to Step 6

5

Replace the brake linings as necessary. Refer to the appropriate procedures in Disc Brakes:

Did you complete the repair?

Go to Step 14

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6

Inspect the brake rotor for the following:

    • Hot spots
    • Scored rotor surface
    • Grooved rotor surface

Do any of the above conditions exist?

Go to Step 7

Go to Step 8

7

Resurface or replace the brake rotor as necessary. Refer to the appropriate procedure in Disc Brakes:

Did you complete the repair?

Go to Step 14

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8

Inspect the Vacuum Brake Booster for leaks. Refer to Vacuum Booster Test .

Is the Vacuum Brake Booster leaking?

Go to Step 9

Go to Step 10

9

Repair or replace the Vacuum Brake Booster. Refer to Power Vacuum Brake Booster Replacement .

Did you complete the repair?

Go to Step 14

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10

Check the master cylinder outlet ports for restricted passages. Refer to Master Cylinder Test .

Are the outlet ports restricted?

Go to Step 11

Go to Step 12

11

Repair or replace the master cylinder. Refer to the appropriate procedure:

Did you complete the repair?

Go to Step 14

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12

Check the brake pipes and hoses for the following:

    • Low fluid or no fluid output
    • Spurting of fluid while pressing the brake pedal
    • Particles suspended in the fluid

Refer to Hydraulic Brake System Flushing .

Do any of the above conditions exist?

Go to Step 13

Go to Step 14

13
  1. Determine the area of the restriction. This will involve the disassembly of individual brake lines and checking for low or no fluid output.
  2. Flush the individual brake line or hose. Refer to Hydraulic Brake System Flushing .
  3. If the restriction cannot be removed, replace the restricted brake hose or the brake pipe. Refer to the appropriate procedure:
  4. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .

Did you complete the repair?

Go to Step 14

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14

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2