GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support System Check

Lumbar Support System Check AL2

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Move the LH lumbar switch IN and OUT.

The LH lumbar support moves in and out.

Lumbar Support Does Not Move In or Out

2

Move the LH lumbar switch UP and DOWN.

The LH lumbar support moves up and down.

3

Move the RH lumbar switch IN and OUT.

The RH lumbar support moves in and out.

Lumbar Support Does Not Move In or Out

4

Move the RH lumbar switch UP and DOWN.

The RH lumbar support moves up and down.

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

Lumbar Support System Check AC9

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Sit in the LH front seat.
  2. Turn the ignition switch to the ON position.
  3. Move the LH lumbar switch IN and OUT.

The LH seat back and seat cushion inflates and deflates as commanded.

Lumbar Support Inoperative

2

Move the LH lumbar switch to the AUTO/ON position.

The LH adaptive seat automatically inflates or deflates.

Lumbar Support Inoperative

3
  1. Sit in the RH front seat.
  2. Move the LH lumbar switch IN and OUT.

The RH seat back and seat cushion inflates and deflates as commanded.

Lumbar Support Inoperative

4

Move the RH lumbar switch to the AUTO/ON position.

The RH adaptive seat automatically inflates or deflates.

Lumbar Support Inoperative

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

Lumbar Support System Check A45

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Place the gear selector in PARK position.
  2. Move the LH lumbar switch IN and OUT.

The LH lumbar support moves in and out.

Lumbar Support Does Not Move In or Out

2

Move the LH lumbar switch UP and DOWN.

The LH lumbar support moves up and down.

3

Press the 1 button on the memory function switch.

A single chime is heard. The LH lumbar support moves to the position programmed for driver 1. Note that the LH seat, headrest, steering column, and both mirrors may also move.

Memory Seats System Check

4

Press the 2 button on the memory function switch.

A single chime is heard. The LH lumbar support moves to the position programmed for driver 2. Note that the LH seat, headrest, steering column, and both mirrors may also move.

Memory Seats System Check

5
  1. Adjust the LH lumbar support to provide the desired support.
  2. Press the SET button followed by the 1 button on the memory function switch.
  3. Move the LH lumbar support in all directions.
  4. Press the 1 button on the memory function switch.
    • The LH lumbar support moves as commanded.
    • A single chime is heard. The current position for the LH lumbar support is stored in memory. Note that the positions for the LH seat, headrest, steering column, and both mirrors will also be stored.
    • The LH lumbar support moves as commanded.
    • A single chime is heard. The LH lumbar support moves to the position programmed for driver 1.

Memory Seats System Check

6
  1. Move the gear selector lever in the PARK position.
  2. Press the UNLOCK button on the driver side 1 keyless entry transmitter.
  3. Press the UNLOCK button on the driver side  2 keyless entry transmitter.

The LH lumbar support performs one of three personalized options. Refer to Memory Seat Description .

Diagnostic System Check - Remote Keyless Entry in Keyless Entry

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