Method 1: Simple Oil Life Percentage Reset (Most Common)
1. Turn the ignition to the "ON" position (without starting the engine).
2. Locate the "OIL LIFE" indicator. This is usually shown on the DIC (Driver Information Center).
3. Press and hold the "Reset" button on the trip odometer. This button is usually on the steering wheel or the instrument cluster stalk. You may need to cycle through different information displays on the DIC until you reach the oil life screen.
4. Continue holding the button until the oil life resets to 100% (or a similar indication). This usually requires holding it for a few seconds. The display might briefly show "0%" before resetting.
Method 2: More Advanced Systems (Less Common)
Some 2007 Trailblazers might have a more complex system. If the above doesn't work, try this:
1. Turn the ignition to the "ON" position (without starting the engine).
2. Cycle through the DIC displays. Use the buttons on the steering wheel or stalk to find the oil life information. The exact method varies by trim level. Look for a menu option that allows you to reset the oil life.
3. Follow the on-screen prompts. The DIC may provide specific instructions on how to reset the oil life.
If Neither Method Works:
* Consult your owner's manual: Your owner's manual should have the exact procedure for resetting your oil life monitor.
* Search online for your specific trim level: Searching for "2007 Chevy Trailblazer [trim level] oil life reset" might yield specific instructions and videos.
* Ask a mechanic: If you are still having trouble, a mechanic can easily reset the system for you.
Important Note: Resetting the oil life monitor only resets a *reminder*. Always change your oil according to the manufacturer's recommended interval, regardless of what the monitor says. Ignoring the recommended oil change interval can severely damage your engine.
