GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Sonoma Pickup - 2WD 🢒 Transmission/Transaxle 🢒 Clutch 🢒 Pedal Stays on Floor (Clutch Disengaged)

Diagnostic Aids

Inspect the clutch pedal for a loose or worn clutch pedal spring. If the clutch pedal stays to the floor you should check the master cylinder for improper fluid level or faulty parts. Also inspect the hydraulic hoses or pipes for damage or even leaks. Inspect the clutch diaphragm springs to see if they are broken.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This step explains there parts and the operation of the clutch system.

    2.

  2. This step inspects the hydraulic lines for kinks, dents or other damage.

    3.

  3. This step inspects for the correct fluid level in the reservoir.

    4.

  4. This step inspects for a faulty release bearing.

    5.

  5. This step inspects for a worn or damage diaphragm spring.

Step

Action

Yes

No

DEFINITION: Low clutch pedal or pedal stays on the floor.

1

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

Go to Step 2

Go to Symptoms - Clutch

2

Inspect to see if the master cylinder has fallen off the clutch pedal.

Has the master cylinder pushrod fallen off the clutch pedal?

Go to Step 4

Go to Step 3

3

Inspect the clutch hydraulic line.

Is the hydraulic line bursting or leaking?

Go to Step 4

Go to Step 4

4

Correctly install the master cylinder pushrod. Refer to Master Cylinder Replacement .

Did you find and repair the condition?

System OK

Go to Step 6

5

Replace the master cylinder and hydraulic line assembly. Refer to Master Cylinder Replacement .

Did you find and repair the condition?

System OK

Go to Step 6

6

Inspect the reservoir for fluid.

Is there fluid in the reservoir?

System OK

Go to Step 7

7

Fill the reservoir with fluid. Refer to Hydraulic Clutch Bleeding .

Did you find and repair the condition?

System OK

Go to Step 8

8

Inspect the master cylinder for being faulty.

Is the master cylinder faulty?

Go to Step 9

System OK

9

Replace the master cylinder. Refer to Master Cylinder Replacement .

Did you find and repair the condition?

System OK

Go to Step 9

10

  1. Remove the transmission. Refer to Transmission Replacement in Manual Transmission - NV1500.
  2. Inspect the concentric slave cylinder for binding.

Is there binding on the concentric slave cylinder?

Go to Step 9

System OK

11

Replace the clutch release bearing. Refer to Clutch Concentric Actuator Cylinder Replacement .

Did you find and repair the condition?

System OK

Go to Step 12

12

Inspect the clutch diaphragm spring.

Are the diaphragm springs weak or broken?

Go to Step 13

Go to Step 14

13

Replace the clutch pressure plate. Refer to Clutch Assembly Replacement .

Did you find a repair the condition?

Go to Step 14

Go to Diagnostic Aids

14
  1. Install the transmission. Refer to Transmission Replacement in Manual Transmission - NV1500.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1