Here's what you should do:
1. Get the Diagnostic Trouble Code (DTC): A 1994 Corvette uses an OBD I system. You'll need a scan tool specifically designed for OBD I to read the trouble codes stored in the car's computer. Auto parts stores often have these tools available for rent or use, or you can find an independent mechanic who can do it. The code(s) will give you a clue about the problem.
2. Address the underlying problem: Once you have the DTC, research what it means. It could be anything from a loose gas cap to a more serious sensor issue. Fix the problem that triggered the light, not just the light itself. Replacing a faulty sensor or fixing a leak won't be a simple task and might require a mechanic.
3. Clear the code (after fixing the problem): After you've repaired the issue that caused the SES light to come on, you can clear the code. Some OBD I scanners have this functionality. However, on some vehicles you need to disconnect the battery for a few minutes to clear the code. This usually involves disconnecting the negative terminal. But don't do this until you've fixed the problem.
Important Considerations:
* OBD I limitations: OBD I systems are less sophisticated than later OBD II systems. The codes might be less specific, requiring more investigation to pinpoint the root cause.
* Professional help: If you're not comfortable working on your car, take it to a qualified mechanic. Attempting repairs without the proper knowledge and tools could worsen the problem.
* Don't just clear the light: Clearing the light without fixing the problem is dangerous and will likely cause the light to return.
In short: Don't focus on resetting the light; focus on fixing the problem that triggered it. The SES light is your car's way of telling you something is wrong. Ignoring it could lead to costly repairs down the line.