The factory blowers have different part numbers with and with out a/c. The aftermarket do not. I do now know what the difference is on the factory blower motors. I always use aftermarket and they fit and connect just fine.
where is the blower motor on a 2001 chevy blazer
Location of blower fan on 2001 blazer
how to change the blower motor
Resistor is a separate unit from the blower motor
location of resister for blower motor on 1997 s 10 blazer
Blower motor NG. Blower motor resister NG. Blower motor fuse NG. Blower motor switch NG.
The fuse. The blower motor speed resistor. The blower motor relay. The blower motor switch. Check for power at the blower motor connection.
Under the hood, on the firewall, passenger side, close to the blower motor.
You didn't mention what year S10 Blazer you have but, the blower motor speed resistor can be found under the hood, on the passenger side of the firewall, close to the blower motor.
They get noisy, squeal and vibrate. Also if you keep burning out the blower motor resistor, that is a sign the blower motor is on its way out.
The blower motor high speed relay is located under the hood, on the passenger side firewall close to the blower motor. The blower motor speed resistor is also located in that same area.
Under the hood, passengers side firewall, close to the blower motor.