GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1

Did you perform the Automatic Transmission Shift Lock Control System Check?

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Go to Step 2

Go to Automatic Transmission Shift Lock Control System Check

2

  1. Disconnect the brake switch.
  2. Turn the ignition switch to the run position.

Can the transaxle be shifted out of park?

--

Go to Step 3

Go to Step 4

3

  1. Check the adjustment of the brake switch.
  2. If the adjustment is OK, replace the brake switch.

Is the repair complete?

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Go to Automatic Transmission Shift Lock Control System Check

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4

Disconnect the BTSI connector.

Can the transaxle be shifted out of park?

--

Go to Step 5

Go to Step 6

5

Repair the short to battery in circuit 420 between the brake switch and the BTSI connector.

Is the repair complete?

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Go to Automatic Transmission Shift Lock Control System Check

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6

Replace the BTSI solenoid.

Did you complete the repair?

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Go to Automatic Transmission Shift Lock Control System Check

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