GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

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

1

Check the transmission fluid level. Refer to Transmission Fluid Level Inspection .

Is the transmission fluid level correct?

--

Go to Step 3

Go to Step 2

2

Add transmission fluid if necessary.

Can the transmission be shifted out of gear?

--

System OK

--

3

Check for the correct type transmission fluid.

Is the correct type transmission fluid being used?

--

Go to Step 5

Go to Step 4

4

Drain and refill the transmission with the correct type fluid. Refer to Transmission Oil Drain and Fill .

Can the transmission be shifted out of gear?

--

System OK

--

5

Check the clutch actuator cylinder operation.

Is the clutch actuator operating properly?

--

Go to Step 7

Go to Step 6

6

Replace the clutch actuator cylinder. Refer to Clutch Actuator Cylinder Replacement in Clutch.

Can the transmission be shifted out of gear?

--

System OK

Go to Step 7

7

  1. Remove the transmission. Refer to Transmission Replacement .
  2. Disassemble and inspect the transmission for a dented or damaged shift fork.

Is there a dented or damaged shift fork?

--

Go to Step 8

Go to Step 9

8

  1. Replace the worn or damaged components as necessary. Refer to Transmission/Transaxle/Transfer Case Unit Repair Manual.
  2. Install the transmission. Refer to Transmission Replacement .

Can the transmission be shifted out of gear?

--

System OK

--

9

Disassemble and inspect the transmission for a incorrectly assembled or broken shift mechanism.

Is there a incorrectly assembled or broken shift mechanism?

--

Go to Step 10

Go to Step 11

10

  1. Replace worn or damaged components as necessary. Refer to Transmission/Transaxle/Transfer Case Unit Repair Manual.
  2. Install the transmission. Refer to Transmission Replacement .

Can the transmission be shifted out of gear?

--

System OK

--

11

Disassemble and inspect the transmission for a worn or damaged geartrain component.

Are there any worn or damaged geartrain components?

--

Go to Step 12

--

12

  1. Replace worn or damaged geartrain components as necessary. Refer to Transmission/Transaxle/Transfer Case Unit Repair Manual.
  2. Install the transmission. Refer to Transmission Replacement .

Can the transmission be shifted out of gear?

--

System OK

--