I could not find alot of information on the internet on how to add audio controls to my Pontiac so I thought I would document and post how it can be done. My car is a 2003 grand am with monsoon. The wrecker car was a 2001 grand am with monsoon. However as you watch I think it can be added to non monsoon cars as well as long as you have the green and pink wire that goes into the main harness. Enjoy sorry for the two parts but youtube made me break it up.