My 95 Surburbus has issues with the blower controls for the front & rear, and I have heard this might be a common problem. There is no fan control at low, med-low, or med-high from any one of the three control stations (Front AC, Front overhead, or rear). From all three stations High works. My schematics do not give the details of how the fan speeds are controlled. I was thinking that it might be something like a grounding issues at the main controller. Does anyone know if there are any DIY fixes for this problem.