How to disconnect a heater fan in a gmc envoy xl suv
There is a blower motor resistor that has gone bad, to shut it down unplug the blower motor. The resistor is usually located by the blower motor, follow the wires from the blower motor to another plugin, that should be the resistor.
In the meantime you can pull the fuse but other things may go off as well.
Search GMC Envoy XL Questions
GMC Envoy XL Experts