To turn off the SES light, you must fix the underlying problem that triggered it. Here's how to approach this:
1. Get a Code Read: You need to get the diagnostic trouble code (DTC) stored in the car's computer. This code tells you *what* the problem is. You have a few options:
* OBD-I Scanner: You'll need a scan tool specifically designed for OBD-I systems (pre-1996). These are less common now, and you might need to find one at an auto parts store or online.
* Check Engine Light Flash Codes: Some OBD-I systems can display codes through a flashing sequence of the SES light. This involves jumping a diagnostic connector, usually located under the dash. Consult your owner's manual (if you have it) for the precise procedure. The flashing patterns translate to specific codes. You'll need a chart to interpret these codes. Many online resources exist with these code charts for GM vehicles from this era.
* Mechanic: The simplest method is to take it to a mechanic. They have the tools and expertise to read the code quickly.
2. Diagnose and Repair: Once you have the code(s), research what the code(s) means. This will point you towards the faulty component (e.g., oxygen sensor, mass airflow sensor, etc.). You can try to repair it yourself if you're mechanically inclined, or have a mechanic do it.
3. Clear the Code (After Repair): *Only after you've fixed the problem* should you attempt to clear the code. For OBD-I systems, this often involves disconnecting the battery's negative terminal for a few minutes (30-60 minutes is usually sufficient). This will reset the computer.
Important Considerations:
* Driving with the SES light on is not recommended. Ignoring the problem could lead to further damage.
* The code might return if the repair wasn't successful. This means the original problem wasn't fixed or there is another problem.
* Finding an OBD-I scanner might be challenging. Many auto parts stores may not carry them, and online searches might be required.
In short, there's no quick reset button. Addressing the underlying issue is crucial. Getting the diagnostic trouble code is the first, essential step.
