Oil service reset Pontiac G5
Turn the ignition to run (one position before starting engine).
Press the INFO and RESET (arrow) buttons on the DIC at the same time to enter the personalization menu.
Press the INFO button to scroll through the menu until OIL LIFE RESET is displayed.
Press and hold the RESET button until the DIC display shows ACKNOWLEDGED. This will tell you the system has been reset.
Turn the ignition off and then start the engine to verify the indicator has been reset.