We now have a high quality repair harness for your heater fan. GM has been noted for having blower resistor pack and harness connector issues. When the resistor pack goes out you can almost bet that you will have at least one bad contact in the plug and most likely the house will be melted. You need to replace this before installing a new resistor pack, if you don't you will have a very short lived repair. Your harness repair kit comes with all new plug and contacts installed on high temp 12ga wire. Many places offer the same thing for over $35. But you can now get it here for $12 plus shipping. We will get it up on our web site with pictures in the next day or two.
Greg