how to replace key lock ign.98 tahoe

[poppi33461]

i need to replace key lock. my manual is not to clear.need steps to go to. Thanks artie

 

[SunlitComet]

One of these procedures should work:

Service and Repair The procedure has been updated by TSB# 73-01-09

Important :
This new procedure involves drilling a hole through the plastic ignition switch and into the lock cylinder slightly to break or access a cylinder release button retaining spring (similar to G, J and N models). The removal of the broken spring and then the release button will allow the switch to be reused.

1. Remove the necessary trim panels to gain access to the instrument panel mounted switch (refer to information in "Body and Accessories Section, Instrument Panel, Gauges and Consoles").

• 1. On instrument panel mounted N models (Malibu and Cutlass), the switch and cylinder can be accessed after removing the instrument cluster assembly and positioning the switch/cylinder upward in the cavity for the cluster assembly.
  2. On Corvette models, the switch and cylinder can be accessed after removing the knee bolster from the lower instrument panel area and positioning the switch/cylinder downward from its location on the instrument panel.

1. Loosen switch from instrument panel and disconnect the electrical connections, BUT NOT the cable connection for BTSI (Brake/Transmission Shift Interlock).
2. Protect the immediate work area with a fender cover or other suitable material.

1. Locate the surface for the cylinder release button on the plastic ignition switch housing and center punch a location on the "rib" approximately 3/8" rearward (toward the key entry end) from the cylinder release button, see Figure 3.
2. Using a 1/8" drill bit, carefully drill a pilot hole through the plastic housing only.
3. Using a 9/32" drill bit, carefully drill a larger hole at the pilot location, and slightly into the lock cylinder surface to break the release button retaining spring.
4. Remove portions of the broken spring from the hole using a small pair of needle nose pliers (or other suitable tool) and turn switch over to shake out the release button.
5. Grasp the lock cylinder, remove it from the switch housing.
6. Remove any plastic "flash" from the drilling operations and, using compressed air, blow out the ignition switch assembly.
7. Follow the procedures in the General Information Section of the appropriate vehicle Service Manual when recoding of cylinders is required.
8. Install the new cylinder(s) as required by rotating both the cylinder and ignition switch to the "ON" position and pushing the cylinder into the switch. It may be necessary to depress the release button slightly as it passes by the 9/32" hole previously drilled in the housing.
9. Reassemble the ignition switch and instrument panel components as indicated by the appropriate Service Manual.

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[SunlitComet]

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Ignition Lock Cylinder This article updated with TSB 02-02-35-001.

IGNITION LOCK CYLINDER REPLACEMENT - ON VEHICLE

REMOVAL PROCEDURE

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

For Vehicles equipped with OnStar (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar module). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar module in any way while the ignition is On or with RAP activated may cause activation of the OnStar Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.

1. Disconnect the battery negative cable. Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.
2. Disable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Disabling the SIR System
3. Position the steering wheel half way between the upper and lower tilt stops (if necessary).
4. Remove the steering wheel. See: Steering Wheel
5. Roll back the shift lever seal from the upper and the lower shrouds.
6. Remove the 2 TORX screws from the lower steering column shroud.
7. Remove the lower steering column shroud.
8. Remove the 2 TORX screws from the upper steering column shroud.
9. Lift the upper steering column shroud to gain access to the lock cylinder access hole.

1. Using a bent tip awl, insert the tip into the ignition lock cylinder access hole.
2. Turn the ignition lock cylinder to the START position. Using the bent tip awl, push down on the ignition lock cylinder retaining pin.
3. Release the ignition lock cylinder to the RUN position.

1. Remove the ignition lock cylinder from the lock module assembly by pulling the ignition lock cylinder away from the steering column.

INSTALLATION PROCEDURE

1. Insert the ignition lock cylinder through the upper shroud.
2. Install the ignition lock cylinder to the lock module assembly by doing the following:

2.1. Align the positioning slot and locking tab slot on the lock module assembly to the positioning tab and locking tab on the ignition lock cylinder. 2.2. Push the ignition lock cylinder into the lock module assembly until the locking tab locks against the locking tab.

1. Install the 2 TORX screws to the upper shroud.

• • Tighten the 2 TORX screws to 6 Nm (53 inch lbs.).

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.

1. Install the lower shroud.
2. Install the shift lever seal to the upper and the lower shrouds.
3. Install the steering wheel.
4. Enable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Enabling the SIR System
5. Connect the battery negative cable.
6. Perform the Passlock learn procedure. See: Testing and Inspection\PASSLOCK - Reprogramming Auto Learn

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[aldrinmaclarens29]

I just think you have to replace the wire set. This is how I did it:

1. Open the hood and try looking for your car's ignition wires.

2. You should reach out for the ignition wires.

3. Remember the ignition wires for installation reference.

4. Remove the number one ignition wire from the distributor cap and spark plug. Lay out the new wires and match the correct length wire to the one removed. Repeat this process to install the rest of the ignition wires.

then have a check if it's still not working. Or you could also have these steps followed:

1. Locate your battery.

2. Touch the ground side probe of the DMM to the negative battery post and the power side probe of the DMM to the positive battery post with the vehicle running.

3. Locate your ignition switch.

4. Gain access to the wiring behind the ignition switch.

5.Touch the ground side probe of the DMM to a good known ground (such as an unpainted screw to the body frame or door hinge bolt).

6. Back probe the power side probe of the DMM to the wire that connects the ignition switch to the fuse in the START position.

7. Read the current voltage reading on the DMM. You should have full battery voltage running through the ignition switch at this time. A significant drop (a reading such as 10 Volts or lower) would indicate high resistance in the ignition switch.

8. Turn the car off.

9. Disconnect the negative battery cable.

10. Remove any screws holding the body of the switch to the steering column.

11.Disconnect the wiring harness from the ignition switch.

12. Replace with new switch.

13. Reverse procedure for installation (connecting the battery cables last), test that the key rotates properly in all positions and that the car starts to verify your repairs.

you can do this auto repair in a matter of hours if you will put your time to it. Make sure you do it nice and easy for safety.