GM Service Manual Online
For 1990-2009 cars only
  1. You may reattach the rear defogger bus bar lead wire or terminal by resoldering.
  2. Notice: Use only enough heat to melt the solder. Using excessive heat can damage the rear window defogger components or the rear window.

  3. Use a solder containing 3 percent silver and a rosin flux paste.
  4. Before soldering the bus bar, buff the repair area with fine steel wool. This removes the oxide coating formed during the glass manufacture.
  5. Use a brush in order to apply a paste-type rosin flux in small quantities to the following locations:
  6. • The wire lead
    • The bus bar repair area
  7. Beforehand, coat the soldering iron tip with solder.
  8. Use only enough heat in order to melt the solder. Use only enough solder in order to ensure a complete repair.

  9. DO NOT overheat the wire when resoldering the wire to the bus bar.