replace your blower motor resistor it is behind the glove box two 8mm bolts
truck blower only work on high
The most common cause is a failed blower motor resistor.
Blower resistor must not be functioning properly. It should be replaced
your blower motor resistor is most likely failing. sometimes that's an indication of a failing blower motor, but typically, it's a resistor module failure
A blower motor that only works on high is normally caused by a defective Blower Motor Resistor Pack. DRL, do not have a clue.
from what i have read it is the blower motor resistor it goes bad and only lets the fan run on high google blower motor resistor and read on
Your blower switch sensor is out. Replace it!Then all the speeds will work
either the blower control switch or the blower motoer needs replacing
blower motor resistor needs to be replaced
it's a problem with the blower motor resistor,
faulty blower motor resistor
replace the blower motor resistor