Automatic HVAC system or manual
if automatic try this
Clear all DTCs
Place the ignition switch to the OFF position.
Disconnect the scan tool. If any
Remove the HVAC B fuse for a minimum of 10 seconds.
Re-install the HVAC B fuse.
Start the vehicle.
Wait 40 seconds for the HVAC control module to re-calibrate.
Verify that no DTCs have set as current DTCs.
check for vacuum leak and check vacuum source
Saturday, October 17th, 2009 AT 2:45 PM