GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

With the ignition in the run position, depress the brake pedal.

Transmission selector will shift from the park position.

BTSI solenoid inoperative

2

With the ignition OFF, release the brake pedal .

Transmission selector will not shift from the park position.

Transmission selector can shift from park position.