GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Prix 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Steering Column Lock Malfunction
Table 1: Ignition Key Can Be Turned to the LOCK Position with the Transaxle Out of Park

Problem

Action

The actuator rod is damaged.

Replace the rod as needed.

The sector to the rack is engaged in the incorrect tooth.
  1. Inspect the components.
  2. Service the components as needed.
  3. Reassemble the components.

The switch is faulty.

Replace the switch.

Ignition Key Can Be Turned to the LOCK Position with the Transaxle Out of Park

Step

Action

Value(s)

Yes

No

1
  1. Verify that the vehicle is in the PARK position.
  2. Turn the ignition switch to the LOCK position.
  3. Use a test lamp in order to backprobe between the Automatic Transmission Control connector terminal C and ground.

Did the test lamp light?

--

Go to Step 2

Go to Step 3

2
  1. Disconnect the Automatic Transmission Control electrical connector.
  2. Verify that the test lamp is in the same position.

Did the test lamp light?

--

Go to Step 4

Go to Step 5

3
  1. Replace the steering column electric park lock.
  2. Inspect the steering column electric park lock system.

Is the repair complete?

--

System OK

--

4
  1. Repair a short to B+ in CKT 1630.
  2. Inspect the steering column electric park lock system.

Is the repair complete?

--

System OK

--

5
  1. Inspect the automatic transmission shift lock actuator for mechanical damage.
  2. Replace the automatic transmission shift lock control actuator if the automatic transmission shift lock control actuator is not damaged.
  3. Inspect the steering column electric park lock system.

Is the repair complete?

--

System OK

--

Ignition Key Cannot Turn to the LOCK Position with the Transaxle in the Park Position

Step

Action

Value(s)

Yes

No

1
  1. Verify that the vehicle is in the park position.
  2. Turn the ignition switch to the RUN position.
  3. Use a test lamp in order to backprobe between the Automatic Transmission Control connector terminal F and ground.

Did the test lamp light?

--

Go to Step 2

Go to Step 3

2

Use a test lamp in order to backprobe between the Automatic Transmission Control connector terminal C and ground.

Did the test lamp light?

--

Go to Step 4

Go to Step 5

3
  1. Repair the following conditions in CKT 1020 between the Automatic Transmission Control connector terminal F and S 376:
    2. • A poor connection
    • An open
  2. Inspect the automatic transaxle control system.

Is the repair complete?

--

System OK

--

4

Use a test lamp in order to backprobe between the steering column electric park lock connector terminal A and ground.

Did the test lamp light?

--

Go to Step 6

Go to Step 7

5
  1. Inspect the automatic transmission shift lock control actuator for mechanical damage.
  2. Replace the automatic transmission shift lock control actuator if the automatic transmission shift lock control actuator is not damaged.
  3. Inspect the automatic transmission shift lock control system.

Is the repair complete?

--

System OK

--

6

Use a test light in order to backprobe between the following steering column electric park lock connector terminals:

    • Terminal A
    • Terminal B

Did the test lamp light?

--

Go to Step 8

Go to Step 9

7
  1. Repair the poor connection or the open in the circuit.
  2. Inspect the automatic transmission shift lock control system.

Is the repair complete?

--

System OK

--

8
  1. Replace the steering column electric park lock.
  2. Inspect the automatic transmission shift lock control system.

Is the repair complete?

--

System OK

--

9
  1. Repair the following conditions in CKT 150 between the steering column electric park lock connector terminal B and ground:
    2. • A poor condition
    • An open
  2. Inspect the automatic transmission shift lock control system.

Is the repair complete?

--

System OK

--