2009 silverado ltz. heating /ac porblem

[ottospuds]

hi all. update on my 09 silverado. at last report i was having problems with my heating/ac system. the drivers side would blow cold air and the pass. side would blow hot. Brought truck back to dealer for a oil change and had them look at it . First trip they said that it was working correctly but before i got home it was back to the same old tricks. went back again and they reprogramed the hole truck and the problem is fixed!!!!!!!!!. I am also getting about 2.5 mph better per gallon. so if you have a simular problem have the truck reprogramed.