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, on the firewall, passenger side, close to the blower motor speed resistor.
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.
Not knowing what year S10 you have, you can generally find the blower motor high speed relay nearby the blower motor on the firewall. The resister for the other lower speeds is also found close by the blower motor.
AC compressor clutch relay, starter relay, high speed blower motor relay,
Under the hood, on the firewall, passenger side, nearby the blower motor speed resistor.
The blower motor speed resister is probably burned out.
Yes it will fit.
You didn't say what year but my 2002 S10 Blazer has the HVAC blower motor resistor located under the hood, on the firewall, passenger side, close to the blower motor. Unplug the wire harness and remove the two small screws holding it in place and gently pull it out.
If only the HIGH SPEED is giving trouble but not the other speeds, check the HIGH SPEED relay mounted on the firewall facing the engine on the passenger side, they burn out easily If all speeds are giving trouble could be the power source or the blower motor
Under the hood, on the passenger side of firewall, near the blower motor.
If the HVAC blower motor does not work on any speeds, I would suspect the motor or the switch is bad.
The relay box is located on the passenger side under the hood. It is mounted on a small bracket on the firewall, at the very top.