GM Service Manual Online
For 1990-2009 cars only

Test Description

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

  1. This step is checking for a faulty actuator cylinder.

  2. This step is checking for a dented or damaged shift fork.

Step

Action

Yes

No

DEFINITION: The transmission cannot be shifted out of a gear.

1

Did you review the manual transmission symptom and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Manual Transmission

2

Inspect the transmission fluid level. Refer to Fluid Replacement .

Is the transmission fluid level correct?

Go to Step 4

Go to Step 3

3

Add transmission fluid if necessary.

Did you find and repair the condition?

Go to Step 10

Go to Step 5

4

Inspect for the correct type transmission fluid.

Is the correct type transmission fluid being used?

Go to Step 6

Go to Step 5

5

Drain and refill the transmission with the correct type fluid. Refer to Fluid Replacement .

Did you find and repair the condition?

Go to Step 10

Go to Step 6

6

Inspect the clutch actuator operation. Refer to Symptoms - Clutch in Clutch.

Is the concentric slave cylinder operating properly?

Go to Step 10

Go to Step 7

7

Remove the transmission. Refer to Transmission Replacement .

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

Did you find and repair the condition?

Go to Step 10

Go to Step 8

8

Disassemble the transmission. Refer to Transmission Disassemble . Inspect the following transmission internal components for wear or damage:

    • Gearshift components
    • Transmission gears
    • Bearings

Are any of the components worn or damaged?

Go to Step 9

Go to Diagnostic Aids

9

  1. Replace the worn or damaged components as necessary.
  2. Assemble the transmission.
  3. Install the transmission. Refer to Transmission Replacement .

Did you find and repair the condition?

Go to Step 10

--

10

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 1