GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Depress the power door lock switch to the LOCK and UNLOCK positions.

All of the doors lock and unlock.

Power Door Locks Inoperative

2

Insert key into LH front door key lock cylinder and turn key to the counterclockwise position.

All of the doors lock.

Power Door Locks Key Lock Switch Inoperative - One

3

Insert key into the RH front door key lock cylinder and turn key to the clockwise position.

All of the doors lock.

Power Door Locks Key Lock Switch Inoperative - One

4

Insert key into the rear door key lock cylinder and turn key to the counterclockwise position.

All of the doors lock.

Power Door Locks Key Lock Switch Inoperative - One

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.