96gmc Sierra , got a new multifunction switch but the harness it plugs into has broken teeth. How would I fix that?

To Remove:

1. Disable the SIR system. (See section on SIR Precautions)
2. Remove the steering wheel from the steering column. (See section on Steering Wheel)
3. Remove the steering column trim covers.
4. Remove the wire harness straps from the wire harness assembly.
5. Disconnect the multifunction switch/SIR coil assembly connector from the base of the column.
6. Remove the multifunction switch/SIR coil assembly lead from the wire harness assembly.
7. Remove the 3 pan head tapping screws from the multifunction switch/SIR coil assembly.
8. Slide the multifunction switch/SIR coil assembly off of the steering column.

Hope this helps. Be very careful where airbag is involved.

In the mb w 203, steering angle sensor (sas) is plugged in the multifunction module which is connected to the wiring harness through a snap on connector. The scan tool was constantantly indicating the fault in the sas where as on diassembly I found that one of the connector pin in the module was broken. I changed the module and the problem was fixed.
Hamid Javaid.

Here is a picture of the brake light switch. Also at this point just buy a new connector and splice it on, much easier.

FIRST TURN OFF RADIO, DISCONNECT NEGATIVE BATTERY CABLE TO DISARM AIRBAG IN STEERING WHEEL,WAIT 20 MINUTES,THEN REMOVE THE STEERING COLUMN COVERS AND THE DRIVERS KNEE BOLSTER.REMOVE THE TORX HEAD MULTI FUNCTION SWITCH SCREWS THEN DETACH THE SWITCH FROM THE STEERING COLUMN.TRACE THE MULIFUNCTION SWITCH WIRES DOWN TO THE LARGE CONNECTOR AND UNPLUG THE CONNECTORS FROM THE LARGER CONNECTOR THEN UNPLUG THE TWO TWO WIRE CONNECTORS FROM THE MULTIFUNCTION SWITCH AND SNIP THE WIRES TIES THAT BUNDLE THE MULTIFUNCTION SWITCH HARNESS TO THE OTHER HARNESS AT THE LARGE CONNECTOR REMOVE THE HARNESS WITH THE MULTIFUNCTION SWITCH.

STEP BY STEP INSTRUCTION First, any time you work around the steeringcolumn you it is a must to disable the air bag system you will do this my disconnectingthe battery. After you disconnect the battery wait at least 5 minutes before proceeding. 1. Ifyou have tilt remove the tilt actuator arm by firmly pulling straight out. 2. Removethe upper and lower trim covers. 3. Removethe wire harness assembly from the wire harness strap. 4. Disconnect the turn signal andmultifunction switch assembly connector from the SIR system coil connector.This is alongside the steering column there is an 8mm bolt in the center of theconnector that must be removed to disconnect the connector halves. 5. Slide the 2 connectors of the turnsignal and multifunction switch assembly out of the bulkhead connector. With a smallscrewdriver slightly pry between the connectors to release them. 6. Removethe 2 pan head tapping screws and from the turn signal and multifunction switchassembly. 7. Removethe turn signal and multifunction switch assembly from the steering column tilthead assembly. INSTALLATION PROCEDURE 1. Installthe turn signal and multifunction switch assembly onto the steering column tilthead assembly. 2. Screwthe 2 pan head tapping screws and into the turn signal and multifunctionassembly.3. Slidethe 2 connectors of the turn signal and multifunction switch assembly into thebulkhead connector. 4. Connectthe turn signal and multifunction switch assembly connector to the SIR coilconnector. 5. Installthe wire harness assembly (1) into the wire harness strap (2). 6. Installthe upper and lower trim covers. 7. Installtilt actuator arm. 8. Reconnectthe battery.

Multifunction Turn Signal Lever Replacement - On Vehicle

Removal Procedure

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
2. Disconnect the negative battery cable.
3. Disable the SIR system.
4. Remove the steering wheel.
5. Remove the steering column trim cover.
6. Remove the steering column knee bolster.
7. Remove the steering column wire harness (1) from the steering column wire harness retainer (2).
8. Remove the 2 wire harness straps from the steering column wire harness (1).
9. Remove the steering column bulkhead connector from the vehicle wire harness.
10. Disconnect the connectors from the multifunction turn signal lever steering column bulkhead connector.

1. Remove the retaining bolts (1) from the multifunction turn signal lever (2).
2. Remove the multifunction turn signal lever (2) from the steering column.

Installation Procedure

1. Install the multifunction turn signal lever (2). Use a small flat-blade in order to compress the electrical contact and move the multifunction turn signal lever into position.
2. Verify that the electrical contact rests on the canceling cam.

Notice: Refer to Fastener Notice in Service Precaution.

1. Install the retaining bolts to the multifunction turn signal lever.

• Tighten the retaining bolts to 7 Nm (62 inch lbs.) .

1. Connect the gray and black connectors to the multifunction turn signal lever steering column bulkhead connector.
2. Connect the steering column bulkhead connector to the vehicle wire harness.
3. Install the two wire harness straps to the steering column wire harness (1).
4. Install the steering column wire harness (1) to the steering column wire harness retainer (2).
5. Install the steering column knee bolster.
6. Install the steering column trim cover.
7. Verify that the lever is in the center or the OFF position.
8. Install the steering wheel to the steering column.
9. Enable the SIR system.
10. Connect the negative battery cable.

I hope this helps you.

Thanks

Removal & Installataion

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
   
2. Disconnect the negative battery cable.
   
3. Disable the SIR (air bag) system. Refer to the Chassis Electrical Section.
   
4. Remove the air bag module from the steering wheel.
   
5. Remove the steering wheel.
   

Remove the upper and lower steering wheel trim covers using the following procedure.

• Remove the tilt lever assembly.
  
• Remove the two pan head tapping screws from the lower shroud.
  
• Unlock the upper and lower shroud.
  
• Remove the two Torx® head screws from the upper shroud.
  
• Remove the upper shroud.
  

Remove the wire harness straps from the wire harness assembly and detach the wiring harness connectors from the switch side connectors.

Remove the two multifunction turn signal switch screws and remove the multifunction switch assembly from the vehicle.

To install:

1. Install the multifunction switch to the steering column. Use a small flat-blade prytool to compress the electrical contact and move the multifunction turn signal switch into position. Verify that the electrical contact rests on the canceling cam. Install the screws and tighten to 62 inch lbs. (7 Nm).
   
2. Route the wire harness along the steering column jacket assembly and secure into the wire harness strap. Install a new wire tie to the upper tilt head assembly and another lower along the wiring harness, as the original installation.
   
3. Verify that the lever is in the center of the OFF position.
   
4. Install the upper and lower steering column shrouds.
   
5. Route the SIR connector through the steering wheel, align the scribe mark on the steering wheel made at removal, with the slash mark on the steering shaft and install the steering wheel. Install the steering shaft nut and torque to 30 ft. lbs. (41 Nm).
   
6. Install the horn contact leads and the air bag connector to the back of the air bag. Make sure the CPA wedge is in place to secure the connector. Install the air bag by gently pushing on both the right and left sides of the air bag until the retaining springs engage.
   
7. Enable the SIR system by connecting the yellow 2-way connector at the base of the steering column and installing the air bag fuse.
   
8. Connect the negative battery cable. Test the horn, turn signals and headlight operation.
   

Removal & Installataion

1. Verify that the multifunction turn signal lever is in the center of the OFF position.
   
2. Disconnect the negative battery cable.
   
3. Disable the SIR (air bag) system. Refer to the Chassis Electrical Section.
   
4. Remove the air bag module from the steering wheel.
   
5. Remove the steering wheel.
   

Exploded view of the shroud-type steering column showing shrouds, wiring and multifunction switch that includes the headlamp function

1. Remove the upper and lower steering wheel trim covers using the following procedure.
2. Remove the tilt lever assembly.
   

• Remove the two pan head tapping screws from the lower shroud.
  
• Unlock the upper and lower shroud.
  
• Remove the two Torx® head screws from the upper shroud.
  
• Remove the upper shroud.
  

1. Remove the wire harness straps from the wire harness assembly and detach the wiring harness connectors from the switch side connectors.
   
2. Remove the two multifunction turn signal switch screws and remove the multifunction switch assembly from the vehicle.
   

To install:

1. Install the multifunction switch to the steering column. Use a small flat-blade prytool to compress the electrical contact and move the multifunction turn signal switch into position. Verify that the electrical contact rests on the canceling cam. Install the screws and tighten to 62 inch lbs. (7 Nm).
   
2. Route the wire harness along the steering column jacket assembly and secure into the wire harness strap. Install a new wire tie to the upper tilt head assembly and another lower along the wiring harness, as the original installation.
   
3. Verify that the lever is in the center of the OFF position.
   
4. Install the upper and lower steering column shrouds.
   
5. Route the SIR connector through the steering wheel, align the scribe mark on the steering wheel made at removal, with the slash mark on the steering shaft and install the steering wheel. Install the steering shaft nut and torque to 30 ft. lbs. (41 Nm).
   
6. Install the horn contact leads and the air bag connector to the back of the air bag. Make sure the CPA wedge is in place to secure the connector. Install the air bag by gently pushing on both the right and left sides of the air bag until the retaining springs engage.
   
7. Enable the SIR system by connecting the yellow 2-way connector at the base of the steering column and installing the air bag fuse.
   
8. Connect the negative battery cable. Test the horn, turn signals and headlight operation.
   

1. Disable the SIR system.
   
2. Remove the upper and lower trim covers.
   
3. Remove the knee bolster.
   NOTE The abrasion sleeve located on the steering column wire harness assembly must be reinstalled. Make note of what connector is coming out of the abrasion sleeve for installation purposes.
   
   
4. Remove the wire harness assembly from the wire harness strap.
   
5. Disconnect the turn signal and multifunction switch assembly connector from the SIR system coil connector.
   
6. Slide the 2 connectors of the turn signal and multifunction switch assembly out of the bulkhead connector.
   
7. Remove the 2 pan head tapping screws and from the turn signal and multifunction switch assembly.
   
8. Remove the turn signal and multifunction switch assembly from the steering column tilt head assembly.
   

To install:
NOTE 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.

CAUTION Be sure that the electrical contact of the turn signal and multifunction switch assembly (2) rests on the turn signal cancel cam assembly.

CAUTION The abrasion sleeve must be installed back onto the steering column wire harness assembly. The ignition lock cylinder case wires and connector must be hanging out of the middle of the abrasion sleeve.

1. To install, reverse removal procedure.
   
2. Tighten the following to specification.
   
   • Top pan head tapping screw: 27 inch lbs. (3 Nm).
     
   • Side pan head tapping screw: 62 inch lbs. (7 Nm).
     

CAUTION When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling . Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.

Multi-function Switch Removal & Installation To Remove:
To Remove:

1. Remove the steering column trim covers.
2. Remove the wire harness from the retainers as needed.
3. Slide the turn signal and multifunction switch connectors out from the bulk head connector.
4. Remove the two mounting screws and remove the multi-function switch from the steering column.

To Install:

1. Install the multi-function switch on the steering column.
   • Tighten the screws to 42 lb in (4.7 Nm).
2. Slide the turn signal and multifunction switch connectors into the bulkhead connector.
3. Install the harness in the original retainers.
4. Install the steering column trim covers.

Yes u do....I have an 03 sierra and apparently they changed everything in 03.....the harness is over $100.....but u need it....and they dont sell a reg wiring kit from 03 and up....if it was an 02, then yes u could get away cheap......it has to do with the steering wheel switches