Hello and welcome to 2CarPros! Just so I'm 100% clear here, is it at the exact same time that the AC stops and the blower starts? Or is there a varying delay. If it's the exact same time, or a consistent delay, then you need a control head. At this age and mileage, I'd bet on that.
I'm attaching Alldata's information on how to replace it. It's very simple really. You can find control heads for these trucks for cheap on Ebay and at the local u pull it.
Sunday, July 7th, 2019 AT 5:01 AM