I have 2008 Colorado Z71 and the AC keeps giving me an AC OFF message and thats it no other warnings and no ac or temp gage. I have taken it in and I also get no error code and they had no idea what to do without and code. Another forum some one suggested to disconnect the battery for an hour or so, and to my surprise It worked for a few weeks. But I would like to figure out how to fix this instead of riding around with a tool in my glove box. Ant suggestions on what is causing this ac off and no ac problem?

Thanks Randy