Method 1: Using the gas pedal and ignition switch (Most Common):
1. Turn the ignition key to the "ON" position. Don't start the engine. The instrument cluster should light up.
2. Locate the gas pedal.
3. Press and hold the gas pedal fully to the floor.
4. Turn the ignition key to the "OFF" position. Keep the gas pedal pressed down.
5. Wait for about 5-10 seconds.
6. Release the gas pedal.
7. Start the engine. The oil change light should now be off.
Method 2: Using a Scan Tool (More Reliable):
This method uses an OBD-II scan tool. These are inexpensive and readily available at most auto parts stores.
1. Obtain an OBD-II scan tool.
2. Connect the scan tool to the OBD-II port (usually located under the dashboard).
3. Turn on the ignition.
4. Navigate the scan tool's menu. You'll need to find the option to reset the service light or oil life monitor. The exact menu options vary by scan tool.
5. Follow the prompts on the scan tool to reset the light.
Important Considerations:
* If neither method works: There might be an underlying issue with your vehicle's computer system. Consult a mechanic.
* Always change your oil according to your owner's manual's recommendations. Don't just rely on the light; it's a reminder, not a precise oil change schedule. Ignoring regular oil changes can severely damage your engine.
* Check your owner's manual: Your owner's manual might have specific instructions for resetting the oil change light.
If you've tried these methods and the light remains on, it's best to take your Trailblazer to a qualified mechanic to rule out any more serious problems.
