GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Place the lumbar switch in the OUT position

lumbar portion of the seat moves to the out position.

lumbar portion of the seat does not move. Go to Lumbar Support Inoperative

2

Place the lumbar switch in the IN position

lumbar portion of the seat moves to the in position.

lumbar portion of the seat does not move. Go to Lumbar Support Inoperative

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