GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Turn Signal and Multifunction Switch Assembly - Off Vehicle

Disassembly Procedure
  1. Remove the multifunction lever. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle .
  2. Remove the hazard knob. Refer to Hazard Warning Switch Replacement - On Vehicle .
  3. Remove the turn signal cancel cam assembly. Refer to Turn Signal Cancel Cam and Upper Bearing Inner Race Replacement .

    4. Object Number: 354112 Size: SH
  4. Remove the round washer head screw (2) from the signal switch arm actuator.
  5. Pry out the signal switch arm actuator (3) from the steering column housing assembly
  6. Remove the 3 binding head cross recess screws (1) from the turn signal switch assembly.

    7. Object Number: 354116 Size: SH
  7. In order to remove the turn signal switch assembly, use the following steps.
  8. Remove the steering column wire harness strap.
  9. Remove the wiring protector.

    10. Object Number: 343824 Size: SH
  10. Disconnect the terminal connector from the turn signal switch assembly connector.
  11. Remove the terminal connector from the dimmer switch assembly.
  12. Pull the turn signal switch assembly connector through the steering column, if needed.

Assembly Procedure

    Object Number: 343961 Size: SH
  1. Thread the turn signal switch assembly connector through the steering column housing assembly, if the connector is hanging.

    2. Object Number: 354114 Size: SH

    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 the turn signal switch assembly and secure using 3 binding head cross recess screws (1).

    3. Tighten
    Tighten the 3 binding head cross recess screws (1) to 3.5 N·m (31 lb in).

  3. Lubricate the signal switch arm actuator (3) with lithium grease.
  4. Install the signal switch arm actuator (3) onto the turn signal switch assembly.
  5. Secure the signal switch arm actuator (3) using the round washer head screw (2).

    6. Tighten
    Tighten the round washer head screw (2) to 2.5 N·m (22 lb in).


    Object Number: 343824 Size: SH
  6. Install the terminal connector to the turn signal switch assembly connector.
  7. Install the terminal connector to the dimmer switch assembly.

    8. Object Number: 354116 Size: SH
  8. Pull the turn signal switch assembly connector towards the base of the column.
  9. Insert the wire protector into the steering column bracket.
  10. Insert the steering column wire harness into the steering column wire harness strap.
  11. Install the multifunction lever. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle .
  12. Install the hazard knob. Refer to Hazard Warning Switch Replacement - On Vehicle .
  13. Install the turn signal cancel cam assembly. Refer to Turn Signal Cancel Cam and Upper Bearing Inner Race Replacement .