GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C Sierra - 2WD 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support Knob Replacement

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.