Footnotes: [ See pull-down menu above for reference. ] * 2009 Pontiac G6 - GM changed the radio halfway through the year so there are two harness possibilities in this vehicle. If the radio in the vehicle has a red display with a "SRCE" button on the face you are good to use the ISGM533. However if the radio in the vehicle has a large "DIAL" button in the middle with a "BAND" + "CAT" button combination you will need to use the ISGM532.