How do you reset service engine soon light myself in 2002 Chevy Tahoe?

You can't reliably reset the "Service Engine Soon" (SES) light on a 2002 Chevy Tahoe yourself simply by pushing a button or following a generic procedure. The light illuminates because the vehicle's onboard diagnostic system (OBD-II) has detected a problem. Ignoring the light is strongly discouraged.

Here's why and what you should do:

* The light indicates a problem: The SES light means a fault code has been stored in the computer. This could be something minor (loose gas cap) or something serious (failing catalytic converter). Resetting the light without addressing the underlying issue will only make it come back on.

* OBD-II scanner needed: To properly reset the light, you need an OBD-II scanner. These are relatively inexpensive and available at most auto parts stores. The scanner will read the diagnostic trouble codes (DTCs) stored in your Tahoe's computer. Knowing the code(s) is crucial to understanding the problem.

* Repairing the problem: Once you know the DTCs, you can research the likely cause and either fix it yourself (if you're mechanically inclined) or take it to a mechanic. *After* the problem is fixed, the scanner can then clear the code(s), which will turn off the SES light.

Steps using an OBD-II scanner:

1. Purchase an OBD-II scanner: Get one that can read and clear codes. Generic scanners are usually sufficient for this purpose.

2. Locate the OBD-II port: This is usually located under the dashboard, often near the steering column.

3. Connect the scanner: Plug the scanner into the OBD-II port.

4. Read the trouble codes: Follow the scanner's instructions to retrieve the DTCs. Write these codes down.

5. Troubleshoot and repair: Research the codes online (many websites and forums can help) or consult a repair manual to identify the problem. Fix the issue.

6. Clear the codes: Use the scanner to clear the DTCs. The SES light should now turn off.

7. Monitor the light: Drive the vehicle for a while to ensure the problem is truly resolved. If the light returns, the original problem likely persists. Repeat steps 3-7, or seek professional help.

Caution: Simply disconnecting the battery for a short period *might* temporarily clear the light, but this is unreliable and won't address the underlying issue. The light will likely return. Using an OBD-II scanner is the correct way to diagnose and resolve the problem.