GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Place the transaxle gear selector in the PARK position.
  2. Disconnect the brake transmission shift lock control actuator (BTSI) electrical connector.
  3. Turn the ignition switch to the RUN position.

Does the transaxle shift out of PARK?

--

Go to Step 9

Go to Step 2

2

Disconnect the brake transmission shift lock control (BTSI) rod.

Does the transaxle shift out of PARK?

--

Go to Step 3

Go to Step 4

3

Adjust or replace the brake transmission shift lock control actuator.Refer to Automatic Transmission Shift Lock Control Actuator Replacement - On Vehicle

Is the repair complete?

--

System OK

--

4

Disconnect the transaxle shift cable at the steering column.

Does the transaxle shift out of PARK?

--

Go to Step 5

Go to Step 7

5

  1. Reconnect the transaxle range selector cable at the steering column.
  2. Disconnect the transaxle range selector cable at the transaxle.

Does the transaxle shift out of PARK?

--

Go to Step 6

Go to Step 8

6

Repair the transaxle internal linkage.

Is the repair complete?

--

System OK

--

7

Repair the linear shift assembly in the steering column. Refer to Linear Shift Assembly - Disassemble - Off Vehicle

Is the repair complete?

--

System OK

--

8

Replace the transaxle range selector cable. Refer to Range Selector Lever Cable Replacement .

Is the repair complete?

--

System OK

--

9

  1. Connect a test lamp from terminal A of the BTSI connector to ground.
  2. Firmly depress the brake pedal.

Does the test lamp light?

--

Go to Step 10

Go to Step 3

10

  1. Leave the test lamp at the same location.
  2. Disconnect the stoplamp switch connector C2.

Does the test lamp light?

--

Go to Step 11

Go to Step 12

11

Repair the short to B+ in CKT 1135 between the BTSI and the stop lamp switch.

Is the repair complete?

--

System OK

--

12

Adjust or replace the stoplamp switch as needed. Refer to Stop Lamp Switch Replacement .

Is the repair complete?

--

System OK

--