Method 1 (Most Common):
1. Turn the ignition to the "ON" position. Do *not* start the engine.
2. Locate the trip odometer reset button. This is usually a small button on the instrument cluster, often near the steering wheel. It might be labeled with a small triangle or a symbol resembling a speedometer.
3. Press and hold the trip odometer reset button. You may need to hold it for several seconds (5-10 usually).
4. While holding the button, cycle the ignition key from "ON" to "OFF" and back to "ON" several times quickly. The exact number of cycles is not standardized, but 3-5 is usually sufficient. You should see the oil life percentage start to change or reset.
Method 2 (If Method 1 Fails):
Some 2003 Chevy Express vans might require a slightly different procedure. You might need to:
1. Turn the ignition to the "ON" position. Do *not* start the engine.
2. Press and hold the trip odometer reset button.
3. Simultaneously press and hold another button. This could be the button for the information display or another button on the instrument panel. Experiment with this if Method 1 doesn't work.
If neither method works:
* Consult your owner's manual: This is the best source for specific instructions for your vehicle.
* Use an OBD-II scanner: A more advanced scanner can often reset the oil life monitor.
Important Considerations:
* Actually change your oil: Resetting the oil life monitor without changing the oil is pointless and could damage your engine. Always change your oil and filter at the recommended intervals.
* Don't panic if the light comes on. The oil life monitor is just an indicator; it doesn't directly detect low oil pressure. If the oil pressure light comes on (often red), that's a much more serious issue requiring immediate attention.
If you are still having trouble, searching online for "2003 Chevy Express oil life reset" along with your specific trim level (e.g., 1500, 2500, 3500) might yield more specific instructions. Remember to consult your owner's manual as the primary source of information.
