FixVault

Installation Procedure

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Installing Lumbar Knob
GM378530Courtesy of GENERAL MOTORS CORP.

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