GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 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.

Lumbar Support System Check AM3

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Move the lumbar switch UP momentarily.

The lumbar support begins the massage operation and will operate for 10 minutes unless the lumbar switch is moved DOWN momentarily. The lumbar support will move a total of 50mm in each direction of up and down for the massage cycle time. When the lumbar massage is completed the lumbar support will return to the position from which the massage was initiated.

2

Move the lumbar switch DOWN momentarily.

The lumbar support massage operation is cancelled. Manually moving the lumbar switch UP or DOWN also cancels massage operation and moves the lumbar support in the desired direction

3

Press the 1 button on the memory function switch.

A single chime is heard. The lumbar support moves to the position programmed for driver 1. Note that the seat, headrest, steering column, and both mirrors may also move. If lumbar massage is active, massage will continue its normal operation. When massage has ceased, lumbar vertical will return to the position programmed for driver 1.

Memory Seats System Check

4

Press the 2 button on the memory function switch.

A single chime is heard. The lumbar support moves to the position programmed for driver 2. Note that the seat, headrest, steering column, and both mirrors may also move. If lumbar massage is active, massage will continue its normal operation. When massage has ceased, lumbar vertical will return to the position programmed for driver 2.

Memory Seats System Check

5
  1. Adjust the 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 lumbar support in all directions.
  4. Press the 1 button on the memory function switch.
    • The lumbar support moves as commanded.
    • A single chime is heard. The current position for the lumbar support is stored in memory. Note that the positions for the seat, headrest, steering column, and both mirrors will also be stored.
    • The lumbar support moves as commanded.
    • A single chime is heard. The 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 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.