Here's what you should do:
1. Get a Diagnostic Code: A 1989 Suburban likely uses a simple diagnostic system. You'll need to perform a diagnostic procedure to retrieve a trouble code (often called a DTC). This involves bridging specific terminals in the vehicle's diagnostic connector (often located under the dashboard). The code will be represented by a series of flashes. You'll need to find a wiring diagram or a repair manual specific to your year and model Suburban to find the connector location and interpret the flashing codes.
2. Interpret the Code: Once you get the code, you'll need to find out what it means. A repair manual or online resources (like forums dedicated to classic Chevy vehicles) can help you translate the code into the potential problem.
3. Fix the Problem: Once you know the cause (e.g., a faulty oxygen sensor, mass airflow sensor issue, or something else entirely – depending on the year and your specific vehicle setup), you need to fix it. This may involve replacing a sensor, repairing wiring, or addressing a more complex mechanical issue.
4. Clear the Code (After Repair): After you've repaired the problem, you can then clear the code. For older vehicles like yours, you might be able to clear the code by disconnecting the battery for a short period (about 30 minutes). Some older vehicles also have a method to clear codes by using the ignition switch in a specific sequence. Check your repair manual for specific instructions.
Important Considerations:
* Repair Manual: A factory service manual for your specific 1989 Suburban year and engine is invaluable. It will contain wiring diagrams, diagnostic procedures, and repair information.
* Professional Mechanic: If you're not comfortable with automotive repair, take your Suburban to a qualified mechanic. Improper diagnosis and repair could lead to further damage.
* Safety First: Never work on your vehicle while it's running. Always disconnect the battery's negative terminal before working with electrical components.
Simply turning off the light without fixing the problem is like ignoring a smoke detector; it's a serious safety and mechanical issue. Address the root cause for reliable and safe operation of your Suburban.
