GM Service Manual Online
For 1990-2009 cars only

Object Number: 808335  Size: A2

If your vehicle has this feature, the control is located on the outboard sides of the front seats. With the ignition on, briefly press the top of the control where it is marked AUTO to activate the massaging lumbar feature.

The massage cycle will run continuously for up to 10 minutes and can be interrupted by briefly pressing the bottom of the control. The lumbar support can be adjusted during the massage cycle by moving the control forward to increase support and rearward to decrease support. The massage cycle will continue to run even if the ignition is turned to OFF unless interrupted.

If your vehicle has this feature, it will not have the adaptive seat feature.