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  1. #1

    Default 04 Tahoe, no rear heat

    I have an 04 Z71 and today noticed that the rear heat is blowing cool air no matter what the position of the rear heating controls. I've been surfing around a bit and found reference to this being a known problem; possibly one of the two actuators and/or the CPU needing to be reprogrammed.

    Anyone familiar with this problem and if so, the solution?

  2. #2
    Sr. Engineer ahm1127's Avatar
    Join Date
    Jan 2009
    Pennsylvania, United States


    What did you find out?
    Everyday I wake up is a great day! ;-)
    05' Chevy Suburban, 11' Ford Fiesta

  3. #3


    It was the actuator motor that moves the flap controlling whether the airflow passes over the heater core in the rear heat unit. The part was about $150 and it took me a half hour to remove the plastic trim.

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