Here's a general outline of the process. Specific steps may vary slightly depending on the trim level and any aftermarket modifications. Always consult a repair manual specific to your 1998 GMC Jimmy for the most accurate instructions.
Tools you'll likely need:
* A small flathead screwdriver: For prying and potentially removing retaining clips.
* A Phillips head screwdriver: Potentially needed, depending on the trim piece removal.
* A small pry tool or trim removal tool: To avoid scratching the interior.
* Possibly a key cylinder removal tool: These are specialized tools designed to help remove the cylinder without damage; they are available at auto parts stores.
General Steps (Consult your repair manual for precise details):
1. Steering Wheel Lock: Ensure the steering wheel is not locked. If it is, gently turn the steering wheel back and forth while trying to remove the cylinder.
2. Steering Column Shroud Removal: You'll need to remove the plastic shroud surrounding the steering column. This often involves carefully prying off trim pieces. Be gentle to avoid breaking the plastic clips. These clips often break easily, so take your time.
3. Access to the Ignition Cylinder: Once the shroud is removed, you'll have access to the ignition cylinder itself. There may be a retaining clip or ring securing the cylinder.
4. Retaining Clip/Ring Removal: This is the trickiest part. You might need to use a small flathead screwdriver to carefully pry off any retaining clips or rings holding the cylinder in place. A dedicated key cylinder removal tool will make this significantly easier and safer. Be extremely careful not to damage the ignition switch housing or the cylinder itself.
5. Cylinder Removal: With the retaining mechanism removed, the cylinder should slide out. There may be a slight resistance; gently wiggle it out.
Important Considerations:
* Take Pictures: Before you start, take pictures of each step to help you remember how to reassemble everything.
* Label Wires: If you disconnect any wires, label them carefully to avoid problems during reassembly.
* Professional Help: If you encounter any significant difficulty or feel unsure about any step, seek professional help. A damaged ignition system can be costly to repair.
This is a general guide, and the exact process might vary. Again, refer to a repair manual specific to your 1998 GMC Jimmy for precise instructions and diagrams. This will greatly reduce the risk of damage and ensure a successful repair.
