Pontiac Problems? Ask a Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question.
If you have not checked all fuses you need to do so. If you have, I need to know if you direct wired in the 2007 radio or used GM harness connectors for it, as well as the vin number for your vehicle so I can pull the schematics and the radio model number as well