GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Steering 🢒 Steering Wheel and Column - Standard 🢒 Ignition and Key Alarm Switch Assembly - Assemble - Off Vehicle

    Object Number: 378838 Size: SH
  1. Install the ignition switch assembly (2) onto the steering column jacket assembly (1).
  2. Slide the ignition switch actuator rod into the ignition switch assembly.

    3. 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.

  3. Install the dimmer and ignition switch mounting stud (3).

    4. Tighten
    Tighten the stud to 4 N·m (35 lb in).


    Object Number: 358702 Size: SH
  4. Move the ignition switch assembly slider (2) to the far right position.
  5. Move the ignition switch assembly slider (2) detent to the left. This is the OFF-LOCK position.
  6. Install a 3/32 inch drill bit into the hole on the ignition switch assembly (1) to limit travel.
  7. Push against the ignition switch actuator assembly to limit all the lash.
  8. Install the dimmer switch assembly. Refer to Dimmer Switch Assembly - Assemble - Off Vehicle .