Hello. I hope someone can help with regard to our 04 Envoy. We replaced the blower module in July due to the fan not shutting off - even with car off. Took care of problem for a while. Then fan stopped working off and on over the past month or two. Last week stopped working all together. We replaced the blower module again (for an automatic HVAC) with no change. So we then replaced the blower motor itself. That worked, however, the fan is back on high and wont shut off or go into a lower setting even though the key is not in the ignition. What could be the problem?