1. Ensure that the tires are properly inflated to the recommended pressure found in the owner's manual or on the vehicle's tire information sticker.
2. Insert the key into the ignition and turn it to the "On" position without starting the engine.
3. Press and hold the "Set/Reset" button on the tire pressure monitoring system (TPMS) located on the dashboard until the "TPMS Reset" message appears on the instrument cluster. This button may be labeled differently on your vehicle, so refer to your owner's manual if needed.
4. Continue holding the "Set/Reset" button until the "TPMS Reset Complete" message appears on the instrument cluster, indicating that the system has been reset.
5. Release the "Set/Reset" button, turn off the ignition, and then restart the engine. The tire pressure monitoring system will automatically relearn the new tire pressure values and update the display accordingly.
Note: Some 2008 Chevy Trailblazers may have a different procedure or location for the "Set/Reset" button. If the above steps do not work or you're unsure about the process, refer to your vehicle's owner's manual for more specific instructions.
