Pontiac Problems? Ask a Mechanic for Answers ASAP
.Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you are sure you have power at the HVAC fuse then try turning on the blower motor and recheck the voltage at the fuse. If the power drops out then you most likely have a failing ignition switch which is common. If the power remains okay then check to see if you have battery voltage at the brown wire at the controller . See the wiring diagram for reference in the link below.https://dl.dropboxusercontent.com/u/104923897/AC%20fuse%20Aug%2025.pdf
Both the DIC as well as the HVAC panel can be affected by a failing ignition switch so while you at the dealer make sure to have them check and see if your is on there recall list.