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Heat and ac won't come on unless set at full setting

(2000 Oldsmobile Silhouette)
in Merrillville, IN on July 24, 2010
My heat and ac won't come on unless set at full setting in my Oldsmobile Silouette. It started doing this at the first setting then the second and so forth until it won't blow out unless you turn it on full.
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Popular Answer
on October 06, 2010
We just had this happen to our 1997 Olds Silhouette. We went to Auto Zone and bought a Blower Motor Relay switch, which was very inexpensive. It's located under the glove box. It wasn't very hard for my husband to replace it, either.
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