GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Transmission/Transaxle 🢒 Clutch 🢒 Clutch Pedal Spongy

Diagnostic Aids

If the clutch pedal feels spongy when depressed, inspect for a faulty master cylinder or faulty concentric slave cylinder components.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step inspect the clutch system components and the operation of the clutch system.

    2.

  2. This step inspects for a faulty master cylinder.

    3.

  3. This step inspects for a faulty concentric slave cylinder.

Step

Action

Yes

No

DEFINITION: The clutch pedal feels spongy when depressed.

1

Did you review the clutch symptom operations and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Clutch

2

Inspect the fluid level in the master cylinder reservoir.

Is the fluid at the proper level?

Go to Step 3

System OK

3

Fill the reservoir with clean brake fluid.

Is the reservoir properly filled?

Go to Step 4

-

4

Bleed the clutch hydraulic system. Refer to Hydraulic Clutch Bleeding .

Does the clutch system work?

System OK

Go to Step 5

5

Inspect the clutch master cylinder.

Is the master cylinder faulty?

Go to Step 6

System OK

6

Replace the clutch master cylinder. Refer to Clutch Master Cylinder Replacement .

Does the clutch function properly?

System OK

Go to Step 7

7

  1. Remove the transmission. Refer to Transmission Replacement in Manual Transmission - M35.
  2. Inspect the concentric slave cylinder.

Is the concentric slave cylinder faulty?

Go to Step 8

System OK

8

Replace the concentric slave cylinder. Refer to Clutch Concentric Actuator Cylinder Replacement .

Did you find and repair the condition?

Go to Step 9

Go to Diagnostic Aids

9
  1. Install the transmission. Refer to Transmission Replacement in Manual Transmission - M35.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1