the fuse you have two fuse box one under hood and one under the dash.
if all speeds do not work id say is a fuse, but if you just dropped one or two speeds. replace the blower motor resister. sells for $60.00 at the dealer.
chevy trucks have the blower resistor pack in the bottom of the airbox on the passenger side under the dash. i would assume the suv's would be the same.
I would suspect the blower motor speed resister is shot.
Probably a bad blower motor resistor
either the control head is bad or there is a blower motor resistor that is bad.
No, that would have no bearing on the blower motor. Check the fuse, blower motor resistro pack, and the blower motor itself.
Blown fuse, defective blower motor, or defective blower motor resistor pack.
blower motor has a short. replace blower motor
neither,blower resistor or blower module controls fan speeds.
The blower motor speed resistor is burned out. The resistor is located close to the blower motor and is easy to change. Your local auto parts store will have that part for you.
Blown fuse, defective blower motor resistor pack, defective blower motor, a bad switch, or disconnected or loose wiring.
If you have no speeds at all, including high speed and you have power at the fuse and the fuse is good, I would suspect the heater blower speed switch and or the electrical plug to the switch is cooked. If you have high speed only and the rest are dead, I would suspect the blower motor speed resistor.