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AC temp control on passenger side does not work

(2001 GMC Sierra 2500 HD)
in Kerrville, TX on August 01, 2011
passenger side air is hot no matter where control is set.
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Popular Answer
on August 02, 2011
You may have a failed temperature door actuator for the passenger side of your 2001 GMC Sierra. Fault codes stored in the AC control module would help to confirm this. You will need a scan tool to access these fault codes.
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