Method 1: Using the DIC (Driver Information Center)
Many 1999 Silverados have a Driver Information Center (DIC) in the instrument cluster. This is the most likely method:
1. Turn the ignition key to the "ON" position (without starting the engine).
2. Locate the oil life percentage in the DIC. This is usually displayed as a percentage (e.g., 15%).
3. Use the DIC's up/down buttons (usually on the steering wheel or the DIC itself) to cycle through the displayed information. You're looking for a menu option related to oil life or service reminders. The exact button sequence and menu structure varies slightly depending on options. It might involve holding a button down for a few seconds.
4. Find the oil life reset option. Once you find the oil life screen, there should be an option to reset it. Again, the exact wording varies, but it might say "Reset Oil Life," "Reset Maintenance," or something similar.
5. Follow the on-screen prompts to confirm the reset. The oil life percentage should then be reset to 100% (or a similar maximum value).
Method 2: Using a Scan Tool
If Method 1 doesn't work or you can't find the relevant option in your DIC, you might need to use an OBD-II scan tool. These tools plug into your car's OBD-II port (usually under the dashboard). Many inexpensive OBD-II scanners can read and clear trouble codes, as well as reset service reminders (like oil life).
* Buy an OBD-II scan tool: You can find these at most auto parts stores.
* Connect the scan tool: Plug it into the OBD-II port.
* Navigate the scan tool's menu: Look for an option to reset maintenance reminders or service lights. The exact wording will vary depending on the tool.
Important Considerations:
* Actually change your oil: Resetting the light doesn't change your oil. Change your oil and filter according to the recommended interval in your owner's manual. Ignoring this can severely damage your engine.
* Owner's Manual: Consult your owner's manual for the specific instructions for your truck. It will provide the most accurate and reliable information.
* Year Variation: Even within the 1999 model year, there are slight variations in features.
If you're having trouble, taking your truck to a mechanic or auto parts store is always an option. They can help you reset the light and ensure your vehicle is properly maintained.
