Any of you Chevy truck guys know of any good Chevy truck mechanics? My 2000 Silverado 1500 has a problem with the heat/cool knob....once you turn it to heat it stays there until it's damn good and ready to come back to cool, usually after sitting for a few hours. They say it's probably some kind of "door"?

And the gas gauge needle is starting to wig out, jumping around and flipping back and forth when the truck is just idling. Don't know if it's the sending unit or a grounding issue.

A dealership isn't out of the question, if there's any good ones out there.