GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Horn Replacement

Removal Procedure
  1. Disconnect the horn electrical connector from the horn.

    2. Object Number: 202617 Size: SH
  2. Remove the horn mounting nut (4), washer (5) and bolt (3).
  3. Remove the horn (1).

Installation Procedure

    Object Number: 202617 Size: SH
  1. Install the horn (1) to the frame rail.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install horn mounting bolt (3), washer (5), and nut (4).

    3. Tighten
    Tighten the nut to 17 N·m (13 lb ft).

  3. Connect the horn electrical connector to the horns.