GM S-Series Pick-ups and SUV's 1994-1999 Repair Guide

Turn Signal (Combination) Switch

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REMOVAL & INSTALLATION



When servicing any components on the steering column, should any fasteners require replacement, be sure to use only nuts and bolts of the same size and grade as the original fasteners. Using screws that are too long could prevent the column from collapsing during a collision.

1994 Vehicles

See Figure 1

The following procedures require the use of a lockplate compressor tool such as J-23653 or equivalent.

  1. Disconnect the negative battery cable.
  2.  
  3. Matchmark and remove the steering wheel. Please refer to the procedure earlier in this section for details.
  4.  
  5. Remove the shaft lock cover.
  6.  
  7. Push downward on the shaft lock assembly until the snapring is exposed using the shaft lock compressor tool.
  8.  
  9. Remove the shaft lock retaining snapring, then carefully release the tool and remove the shaft lock from the column.
  10.  
  11. Remove the turn signal canceling cam assembly.
  12.  
  13. For standard columns, remove the upper bearing spring and thrust washer.
  14.  
  15. For tilt columns, remove the upper bearing spring, inner race seat and inner race.
  16.  
  17. Move the turn signal lever upward to the "Right Turn" position.
  18.  
  19. Remove the access cap and disengage the multi-function lever harness connector, then grasp the lever and pull it from the column.
  20.  
  21. Loosen and remove the hazard knob retaining screw, then remove the screw, button, spring and knob.
  22.  
  23. Remove the screw and the switch actuator arm.
  24.  
  25. Remove the turn signal switch retaining screws, then pull the switch forward and allow it to hang from the wires. If the switch is only being removed for access to other components, this may be sufficient.
  26.  
  27. If the switch is being completely removed, disengage the wiring at the base of the column. Attach a length of mechanic's wire to the switch harness connector, then pull the harness through the column, leaving the mechanic's wire in place for installation purposes.
  28.  

On some vehicles access to the connector may be difficult. If necessary, remove the column support bracket assembly and properly support the column, and/or remove the wiring protectors.

  1. Remove the switch and wiring harness from the vehicle.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: Use a suitable lockplate compressor tool when removing the shaft lock

To install:
  1. Install the switch and wiring harness to the vehicle. If the switch was completely removed, use the length of mechanic's wire to pull the switch harness through the column, then engage the connector.
  2.  

If the column support bracket or wiring protectors were removed, install them before proceeding.

  1. Position the switch in the column and secure using the retaining screws. Tighten the screws to 30 inch lbs. (3.4 Nm).
  2.  
  3. Install the switch actuator arm and retaining screw, then tighten the screw to 20 inch lbs. (2.3 Nm).
  4.  
  5. Install the hazard knob assembly, then install the multi-function lever.
  6.  
  7. Install the thrust washer and upper bearing spring (standard columns) or the inner race, upper bearing race seat and upper bearing spring (tilt columns), as applicable.
  8.  
  9. Lubricate the turn signal canceling cam using a suitable synthetic grease (usually included in the service kit), then install the cam assembly.
  10.  
  11. Position the shaft lock and a NEW snapring, then use the lock compressor to hold the lock down while you seat the new snapring. Make sure the ring is firmly seated in the groove, then carefully release the tool.
  12.  
  13. Install the shaft lock cover.
  14.  
  15. Align and install the steering wheel.
  16.  
  17. Make sure the ignition is OFF , then connect the negative battery cable.
  18.  

1995-99 Vehicles

See Figure 2



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the combination switch-1996 and later models


CAUTION
These models are equipped with a Supplemental Restraint System (SRS), which uses an air bag. Whenever working near any of the SRS components, such as the impact sensors, the air bag module, steering column and instrument panel, disable the SRS, as described in Fuel System .

  1. Disconnect the negative battery cable.
  2.  

Make sure that the turn signal switch is in the OFF (center) position.

  1. Disable the Supplemental Inflatable Restraint (SIR) system. For details, please refer to the procedure located in Chassis Electrical of this repair guide.
  2.  
  3. Remove the steering wheel.
  4.  
  5. Remove the two pan head tapping screws from the lower steering column cover, then tilt the cover down and slide it back to disengage the locking tabs.
  6.  
  7. Remove the lower steering column cover.
  8.  
  9. Using a Torx® screwdriver, remove the two Torx head screws from the upper steering column cover, then remove the cover.
  10.  
  11. Remove the wire harness strap, then remove the two harness straps from the steering column wire harness.
  12.  
  13. Remove the screw and disengage the steering column bulkhead connector from the vehicle wiring harness.
  14.  
  15. Unplug the gray and black connectors of the switch from the steering column bulkhead connector.
  16.  
  17. Remove the two pan head tapping screws.
  18.  
  19. Grasp the lever/multi-function turn signal switch assembly, then remove it by carefully pulling it straight outward.
  20.  

To install:
  1. Install the lever/multi-function turn signal switch assembly, using a small blade screwdriver to compress the electrical contact and move the assembly into position.
  2.  

The electrical contact MUST rest on the canceling cam assembly.

  1. Connect the two pan head tapping screws, then tighten the screws to 53 inch lbs. (6 Nm).
  2.  
  3. Attach the gray and black connectors of the switch to the column bulkhead connector.
  4.  
  5. Connect the steering column bulkhead connector to the vehicle wiring harness.
  6.  
  7. Connect the two wire harness straps to the steering column wire harness, then install the wire harness strap.
  8.  
  9. Install the upper steering column cover, then using a Torx® screwdriver, connect the two Torx head screws to the upper column cover, tighten to 12 inch lbs. (1.4 Nm).
  10.  
  11. Install the lower steering column cover, then connect using the two pan head tapping screws, tighten to 53 inch lbs. (6 Nm).
  12.  
  13. Make sure that the lever is in the OFF (center) position.
  14.  
  15. Install the steering wheel.
  16.  
  17. If equipped, install the horn pad.
  18.  
  19. Activate the Supplemental Inflatable Restraint (SIR) system. For details, please refer to the procedure located in Chassis Electrical .
  20.  
  21. Connect the negative battery cable.
  22.  

 
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