[SBTork]

Thank you Randy, you got me thinking, I think I may have an idea....

In november, when I bought the suburban, I put a heater core in it and parked it for the winter. I remember asjusting where the temp cable bolts to the heater box to make sure I was getting heat. It's possible that when I adjusted it I was more concerned about hot then cold and adjusted it too far one way. Possibly......I will update once checked.