There are a few ways to potentially clear the CEL, but it's strongly recommended you have a professional mechanic diagnose and repair the problem first. Ignoring the CEL could lead to expensive repairs down the road.
Here's how you *might* clear the CEL (but again, only after addressing the problem):
* OBD-II Scanner/Code Reader: This is the recommended method. A code reader plugs into the OBD-II port (usually under the dashboard) and reads the diagnostic trouble codes (DTCs) stored by the car's computer. Once the problem is fixed, the code reader can usually clear the codes, and the CEL will turn off. This is the best way as it identifies the issue.
* Battery Disconnect: This is a less reliable method and may not work for all issues. Disconnect the negative (-) terminal of your battery for about 10-15 minutes. Reconnect it and start the vehicle. This sometimes resets the computer, but it doesn't guarantee the CEL will stay off if the problem persists.
In summary:
1. Diagnose the problem: Use an OBD-II scanner to find the trouble code(s). This will tell you what's causing the CEL. You can often find affordable code readers at auto parts stores.
2. Fix the problem: Repair the issue identified by the code(s).
3. Clear the code(s): Use the code reader to clear the codes *after* the repair is complete.
If you're not comfortable diagnosing and fixing the problem yourself, take your GMC Savana to a qualified mechanic. They will be able to diagnose the issue, perform the necessary repairs, and clear the CEL properly. Trying to ignore or improperly reset the light will only delay necessary repairs.
