At this point, there is not much you can check without a scan tool. If there are no codes, the next step would be to view HVAC data to see if a fault is shown. Things like comparing sensor data, and inputs and outputs. I did a search, and there are no service bulletins matching your symptom. You can try this recalibration procdure and see if operation improves.
Calibration Procedure without a Scan Tool
Turn OFF the ignition.
Remove the battery positive voltage circuit fuse of the Instrument Panel Control Module.
Important: The module memory will not clear if the battery positive voltage circuit fuse is installed in less than 60 seconds.
Wait 60 seconds.
Install the fuse.
SPONSORED LINKS
Saturday, October 2nd, 2010 AT 9:22 AM
