Question about 2004 GMC Sierra Denali

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My 2004 GMC 1500 truck with dual heater and A/C, will stop working on A/C on the drivers side and blows heater, yet the passenger side still has A/C blowing. If I stop and turn off the key, it resets itself and the A/C is back on. Is this something I can fix?

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I am having the same problem. Find any answers?

Posted on Sep 03, 2010

  • k_jbedard Oct 02, 2010

    One of the common causes is a failed temp control actuator. the drivers temp actuator is on bottom heater module center passenger side. Pass. temp actuator is on top of module harder to get at. Your model may have lower panel covering heat module.

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