[tlaubner]

Any flashing lights or check engine lights?
No flashing lights.

Any dead batterys or jump starts or work done on charging system or ac/heater?
I replaced the battery almost 2 years ago. No jumpstarts. I had the AC charged early last year by the local Chevy dealership.

Does the compresser clutch keep running when it does it?
The compressor does kick on and off when it changes to AC from heat.

Is it just the air flow change or is there a tempture change hot to cold and back to hot to?
It goes back and forth between AC/heat/AC/heat/etc... Each cycle lasting approx 10 seconds. Even when the AC/heat is turned off. You can feel it coming out of the vents.

Have you tryed a recalibrating on it?
Not sure how to recalibrate it.

Any body/ac/heater codes?
None that I know of.