GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 Chevy Suburban - 4WD 🢒 Restraints 🢒 SIR 🢒 Horn Switch Replacement - On Vehicle

Removal Procedure

    Caution: Refer to Servicing the SIR System Caution in the Preface section.


    Object Number: 399638 Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System in SIR.
  2. Remove the Inflatable Restraint Steering Wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR.
  3. Remove the horn plunger from the steering column by pressing inward to the stop and rotating horn plunger 90 degrees.

    4. Object Number: 776565 Size: SH
  4. Disconnect the horn contact plate (2) captured screws (1,4) from the steering wheel (3).
  5. Remove the horn switch (2) from the steering wheel (3).

Installation Procedure

    Object Number: 776565 Size: SH
  1. Install the horn switch (2) to the steering wheel (3).

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Connect the horn contact plate (2) captured screws (1,4) to the steering wheel (3) .

    3. Tighten
    Tighten the horn contact plate captured screws to 5.5 N·m (50 lb in).


    Object Number: 399638 Size: SH
  3. Install the horn plunger to the steering column.
  4. Install the inflator module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR.
  5. Enable the SIR system. Refer to Enabling the SIR System in SIR.