Been have alot of a/c and cooling problems as of late. it started about 4 months ago that after driving for about 20-30 minutes the a/c would bearly blow. found out that it was the resistor, Replaced the resistor then about a week later the a/c would only blow cold for 20-30 minutes and we would have to turn the a/c off and then turn it back on and it would work fine, got tired of turning on and off the a/c so took it in again and nothing showed up. and it started to work fine again for a few weeks then we had a CEL come on and it was the a/c relay that went bad. now the CEL light is on again and it is giving us the p0480 code. any ideas what could be causing this?

 

mustang0021,
Do you have any plans on getting this looked into by your dealership? If so, please be sure to keep us updated on your progress there as we're available to assist in whatever ways we can.
Sarah (Assisting Louis), Chevrolet Customer Service