However, if you're determined to do it yourself, here's a general outline. This is not a complete, step-by-step guide and may not be perfectly accurate for your specific vehicle. Consult a repair manual specific to your 1998 Chevy Astro AWD van for precise instructions and diagrams.
Tools You'll Likely Need:
* Repair manual: Absolutely essential for specific instructions and diagrams. A Haynes or Chilton manual is a good start.
* Screwdrivers: Phillips and flathead, various sizes.
* Socket set: Metric sizes will be needed.
* Pliers: Needle-nose and regular.
* Wrench(es): May be needed depending on the specific fasteners.
* Electrical tape: To protect wires.
* New ignition switch: Ensure you get the correct part number for your specific vehicle.
* Possibly a wiring diagram: Helps with reconnecting the wires correctly.
General Steps (Consult Your Repair Manual for Precise Steps):
1. Disconnect the Battery: This is crucial to prevent electrical shorts and injury. Disconnect the negative (-) terminal first.
2. Remove Steering Wheel (Likely): Access to the ignition switch often requires removing the steering wheel. This is a delicate process and requires special tools (steering wheel puller) and knowledge to avoid damaging the airbag and steering column. Proceed with extreme caution or consult a professional.
3. Remove Steering Column Covers and Trim: You'll need to remove various trim pieces and possibly the lower steering column shroud to access the ignition switch.
4. Remove the Ignition Switch: This often involves removing screws or bolts securing the switch. Take note of how things are connected before disconnecting anything.
5. Disconnect Wiring Harness: Carefully disconnect the wiring harness from the old ignition switch. Take pictures or make detailed notes of the wire placement before disconnecting. This is essential for reassembly.
6. Install the New Ignition Switch: Carefully install the new ignition switch, ensuring it's properly seated and aligned.
7. Reconnect Wiring Harness: Connect the wiring harness to the new ignition switch, matching the wire colors and positions to your notes or pictures.
8. Reassemble: Reinstall the steering column covers, trim pieces, and steering wheel (in reverse order of removal). Again, the steering wheel reinstallation is critical; if unsure, seek professional help.
9. Reconnect the Battery: Reconnect the positive (+) terminal of the battery.
10. Test the Ignition: Turn the key to ensure all positions (accessory, ignition, start) function correctly.
Important Considerations:
* Airbag: If you have to remove the steering wheel, you'll likely be working near the airbag. Disconnecting the airbag incorrectly can be extremely dangerous. If you're uncomfortable with this, seek professional help.
* Key Programming: Some ignition switches require key programming to work correctly. You might need a locksmith or specialized equipment for this.
* Anti-theft System: Your vehicle might have an anti-theft system that could be affected by changing the ignition switch.
This is a simplified overview. Always consult a repair manual specific to your 1998 Chevy Astro AWD van before attempting this repair. The steps and procedures might vary considerably from the general outline provided above. Improper installation can lead to damage and even injury. If you are not confident in your abilities, take your van to a qualified mechanic.
