Chevy G20 - Mark III Conversion
Is under the floor on the driver side, somewhere in the area where is the window behind the driver's seat.
Could be,Blown fuse,Bad blower motor,Bad blower motor switch,Bad blower motor speed resistor,
The blower motor speed resistor is burned out.
Blower motor speed resistor is partially burned out.
Is the rear blower functioning? If so the AC system may be undercharged. I would first suggest checking that the system is properly charged, if it is then there may be a blockage of some type in one of the lines.
When you find out let me know I have same problem replaced blower fan and resisitor did not work. I have a blazer zr2 2002
I would look into the blower motor resistor module
Blower motor control relay under dash behind blower motor is bad or has water in it from cabin filter port.
Your temperature sensor or a fuse is bad.
Either the switch or resister network has failed and needs to be replaced.
did your heater switch go out all of a sudden or did some work like high work and low not work? if some worked your blower resister is most likely bad under your glove box
No, a 2001 Chevrolet S-10 rear end will not work on a 1991 Chevrolet S-10.
85-140 will work.