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On the evaporator case.
Blown blower motor fuse? Bad blower motor or resistor? Check to see if you are getting power to motor - if so motor is bad if not check fuse and/or resistor Bad switch?
Blower motor: remove the glove box and you will see the blower motor and blower resistor.
The blower motor resistor is located on the passenger side under the glove box. Left side. there is a cover on the blower motor. remve the cover, this is the resistor. there is an electrical plug there.
The blower resistor on a 1999 Chevy truck Z1500 is located behind the glove compartment. There is also a resistor on the firewall next to the blower motor itself.
there is a resistor that controls the speed and should be near the blower motor its called blower motor resistor
Attached to the blower motor under the passenger dash
Inside dashboard in path of air that blower motor blows.
Held in by two screws in a housing just to the left of the blower motor housing.
If the heater fan works on all speeds, then the blower motor, blower fuse, blower relay, and blower motor resistor pack are all good. If the fan runs but nothing comes out of the vents, you have a 'mode door' issue (which might include a bad control head).
open glow box and take out computor and it is there on the side of blower motor
There is really no method to "check" the resistor, text by substitution.