How to replace ignition lock cylinder in 2000 GMC Jimmy

here's the manual info, if you need pics, i'll need an email ad to send them, let me know. mws919

This article updated with TSB 02-02-35-001.

IGNITION LOCK CYLINDER REPLACEMENT - ON VEHICLE

Removal Procedure

Disconnect the negative battery cable. Caution: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:
Air bag deployment
Personal injury
Unnecessary SIR system repairs
In order to avoid the above conditions, observe the following guidelines:

Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system.
Disable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Disabling the SIR System
Lower the hush and knee bolster. See: Restraint Systems\Knee Diverter\Service and Repair

Remove the screws that retain the lower steering column trim cover to the steering column.
Remove the lower steering column trim cover by tilting the trim cover down and slide it back in order to disengage the locking tabs.
Remove the screws that retain the upper steering column trim cover to the steering column.

With the key installed, turn the key to the RUN position.
Gently lift the upper trim cover up so that you may install an allen wrench into the hole on top of the lock cylinder housing. Push down on the allen wrench to release the tab on the lock cylinder inside the lock cylinder housing.

Slide the lock cylinder out of the lock cylinder housing.
Installation Procedure

Align the upper steering column trim cover. 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 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.
Install the screws that retain the upper steering column trim cover to the steering column. Tighten the upper steering column trim cover retaining screws to 1.4 Nm (12 in. lbs.)

Install the key into the lock cylinder. Important: The gears between the ignition switch and the lock cylinder housing must be in the correct position. Failure to do so will cause a misalignment of the gears in the ignition switch and the lock cylinder houseing, which may result in a NO START or BATTERY DRAIN.
Use a screwdriver to rotate the lock cylinder housing gear clockwise to the start position, allowing it to spring return into the RUN position.

Align the lock cylinder and install into the lock cylinder housing.
Install the lower steering column trim cover.
Install the screws that retain the lower steering column trim cover to the steering column. Tighten the lower steering column trim cover retaining screws to 6 Nm (53 in. lbs)
Install the steering wheel.
Install the hush and knee bolster. See: Restraint Systems\Knee Diverter\Service and Repair
Enable the SIR system. See: Air Bag(s) Arming and Disarming\Service and Repair\Enabling the SIR System
Connect the negative battery cable.
Perform the PASSLOCK learn procedure. See: Testing and Inspection\Programming and Relearning\PASSLOCK - Reprogramming Auto Learn

In order to disable the air bag, disconnect the battery for at least 20 minutes before starting work on the steering column. Next, disconnect the yellow wire connector located at the base (and a little to the left)of the steering column (may have to remove sound barrier under dash)

Remove a screw (which attaches the air bag to the steering wheel) at rear of steering wheel. Carefully lift air bag from the steering wheel and disconnect the horn and other wiring.
Remove clip (if applicable) and nuts which hold the steering wheel to the column. Use a steering wheel puller to remove the steering wheel (can rent the puller from AutoZone).
Remove the black plastic cover from the column (use a small screwdriver). This will reveal a blackish steel plate, used to hold the shift lever in park.
Now you will need a steering column spring compressor (also rentable at AutoZone). Use the spring compressor to press down on the blackish steel plate. This will reveal a small clip around the center post of the column. Remove this clip (use a couple of small screwdrivers--be patient).
With clip removed, remove blackish plate.
Now, you can see the turn signal switch. AS you turn the left and then the right signal lights on it will reveal three screws which should be removed now.
With turn signal screws removed, carefully lift switch up and over the center post and move it to the side (out of your way).
Remove the small (white’ish) plastic and metal (square’ish) "sensor" (for lack of a better term), located directly beside the lock cylinder toward its’ outer end. Be careful as you pull this "sensor" up. You want to see how it fits into its’ hole so that you can get it back in during assembly.
Remove the bolt which holds the lock cylinder in the column. It’s located near the inner end of the lock cylinder. Once the bolt is removed the cylinder can then be slide out of the column.
Reverse the process to install the new lock.