GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Transmission/Transaxle 🢒 Clutch 🢒 Clutch Does Not Disengage

Diagnostic Aids

Will not shift into gears sitting still, hard shift effort. Vehicle moves with pedal to the floor.

Test Description

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

  1. To check for leaks or worn seals, disassemble the master cylinder.

    2.

  2. Check the concentric slave cylinder leaks or worn parts.

Step

Action

Yes

No

DEFINITION: If the clutch cannot be disengaged, or fails to release, you cannot shift gears.

1

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

Go to Step 2

Go to Symptoms - Clutch

2

Inspect for a pedal travel restriction.

Is the vehicle equipped with a aftermarket floor covering?

Go to Step 3

Go to Step 4

3

Remove the aftermarket floor covering.

Does the clutch work properly?

System OK

Go to Step 4

4

Test the clutch system. Refer to Symptoms - Clutch .

Did you find and repair the condition?

System OK

Go to Step 5

5

You do not bleed the ZF S6-650 transmission.

Inspect for air in the clutch hydraulic system. Self bleed the system and pump the clutch pedal 25 times.

Is there air in the clutch hydraulic system?

Go t Step 7

Go to Step 6

6

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

Did you find and repair the condition?

Go to Step 13

Go to Step 7

7

Inspect the master cylinder for worn parts.

Did you find an repair the condition?

Go to Step 8

Go to Step 9

8

Replace the necessary components. Refer to Master Cylinder Replacement .

Did you find and repair the condition?

Go to Step 13

Go to Step 9

9

  1. Remove the transmission. Refer to Transmission Replacement in Manual Transmission NV-4500.
  2. Inspect for a worn or faulty concentric slave cylinder.

Is the concentric slave cylinder worn or damaged?

Go to Step 10

Go to Step 11

10

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

Does the clutch work properly?

Go to Step 13

Go to Step 11

11

Inspect the clutch assembly for the following:

    • Remove the clutch assembly. Refer Clutch Assembly Replacement
    • Damaged or worn clutch driven plate
    • Binding on the clutch driven plate

Did you find and repair the condition?

Go to Step 13

Go to Step 12

12

Replace the clutch disc. Refer to Clutch Assembly Replacement .

Did you find a repair the condition?

System OK

Go to Diagnostic Aids

13
  1. Install the transmission. Refer to Transmission Replacement in Manual Transmission NV-4500.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1