GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 640413  Size: SH
  1. Open the hood.
  2. Remove the cover from the underhood fuse block.
  3. Remove the horn relay (1)  from the underhood fuse block.

Installation Procedure


    Object Number: 640413  Size: SH
  1. Install the horn relay (1)  to the underhood fuse block.
  2. Install the cover to the underhood fuse block.
  3. Close the hood.