Question about 1991 Chevrolet S-10
GM products with digital climate control used a temopature sensor module which is located under the hood in the heater box. They are known to fail. It souns like your issue lies there. It is sort of triangular in shape and has a single electrical plug with 7 or so wires in it. (I ran a slvage yard for years and sold a ton of these!) There are a series of #'s like a factory I.D./part # that I used to identify and interchange with. I don't know if there has been a generic replacement released over the years. Hope this helps!
Posted on Jan 04, 2012
The blower motor resistor is out and it is fairly inexpensive to get replaced around $25.00.
This page gives an excellent answer to your question.http://www.stratusphere.net/blowerrepair.html
Posted on Feb 20, 2009
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