GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 378530  Size: SH
  1. Toggle the lumbar knob gently back and forth until it releases.
  2. Remove lumbar knob from the seat switch bezel.

Installation Procedure


Object Number: 378530  Size: SH

Insert the lumbar knob onto the shaft of the seat switch bezel until an audible click is heard.