Quote Originally Posted by CoffeeJunkie View Post
Where can I find this reverse lamp harness wire on an '08 Pontiac Grand Prix? What color is that wire?
http://www.modifiedlife.com/2008-pon...-wiring-guide/
Car Reverse Lights Wire (+): Light Green
Car Reverse Lights Wire Location: At BCM Behind Drivers Side Of Dash To Left Of Steering Column

Being from the inter-web, I would check the wiring at the reverse light to confirm.