GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The transmission does not shift into a gear.

1

Check the operation of the transmission shift control.

Is the control worn, binding, or damaged?

--

Go to Step 2

Go to Step 3

2

Replace the transmission shift control. Refer to Shift Control Assembly Replacement .

Will the transmission shift into gear?

--

System OK

--

3

Inspect the hydraulic clutch operation. Is the clutch operating properly?

--

Go to Step 5

Go to Step 4

4

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

Will the transmission shift into gear?

--

System OK

--

5

  1. Remove the transmission. Refer to Transmission Replacement .
  2. Inspect the transmission input shaft and the clutch pilot bearing.

Is there signs of the input shaft binding in the pilot bearing?

--

Go to Step 6

Go to Step 7

6

  1. Replace the clutch pilot bearing. Refer to Clutch Pilot Bearing Replacement in Clutch.
  2. Install the transmission. Refer to Transmission Replacement .

Will the transmission shift into gear?

--

System OK

--

7

Disassemble and 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 8

--

8

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

Will the transmission shift into gear now?

--

System OK

--