1999 A/C Blwing Warm Driver Cold Passenger?
 

My A/C blows cold on passenger side warm on driver. Dual climate control. Any ideas Thanks

I have the same problem on my passenger side. Most likely a bad actuator. Run the codes on the DIC and see if you get the actuator out of range code. I was told that disconnecting the battery for a few minutes might reset it. It didn't work in my case but you might give it a try.
Good luck

Check to see if refrigerant is low. I've heard that this condition can result in cold air on one side only.