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Horn Systems: Removal & Installation GMC Sierra 2500

Installation Procedure

Important: Ensure that the black side of the horn is facing forward on the vehicle.

  1. Install the horn (2) to the radiator support (1). Left side and right side horn assemblies are shown.
  2. Install the horn bolt. Tighten the horn bolts to 9 N.m (80 lb in).
  3. Connect the horn electrical connector.
  4. Install the park/turn signal lamp assembly.
  5. Install the headlamp.
  6. Lower the hood.