How do you Reset air bag light on a 1999 Chevy cavalier after have replaced both drivers and passenger bags?

You can't simply reset the airbag light on a 1999 Chevy Cavalier (or any car) after replacing airbags by yourself. The light is triggered by a complex system that detects malfunctions, and replacing the airbags doesn't automatically clear the system. There's likely a diagnostic trouble code (DTC) stored in the airbag control module (ACM) that needs to be addressed.

What you need to do:

1. Professional Diagnosis: Take your Cavalier to a qualified mechanic or an automotive electrician specializing in airbag systems. They have the tools (a scan tool compatible with the car's system) to read the DTCs stored in the ACM. Simply replacing the airbags doesn't guarantee the system is working correctly – there could be other issues. The scanner will tell you *why* the airbag light is on.

2. Possible Causes (Beyond Just Airbag Replacement): The light might be on due to problems unrelated to the airbags themselves, such as:

* Faulty ACM: The module itself may have malfunctioned.

* Wiring issues: Damaged or corroded wiring in the airbag system is a common cause.

* Sensor problems: Crash sensors or other components within the system might be faulty.

* Clock spring (in the steering wheel): A common problem that can set off the airbag light.

3. Proper Repair: The mechanic will diagnose the problem and fix the underlying cause, *not* just reset the light. Attempting to clear the code without fixing the problem is extremely dangerous as it masks a potentially serious safety issue.

Attempting to reset the light without professional help is strongly discouraged. The airbag system is critical for safety, and improperly resetting the light could result in the airbags not deploying in a crash, leading to serious injury or death. It's far safer and cheaper in the long run to have a professional handle this.