Hi. A couple weeks ago the resistor died for the heater fan on my wife's 2004 Silverado. I bought one at the local parts store for $65.00 because I needed it in a hurry. It made it two weeks and now it is cooked again. The black ground wire in the plug that plugs into the resistor is also burned. I suppose if I buy another resistor it will work for a while before burning out again, but I think there's something else wrong. The 30a fuse is fine. I took the old red and black wire from the fan and plugged them into the harness that plugs into the resistor to get some heat for now. I'd welcome any thoughts. Thanks.