Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Silverado 2500 HD

One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.

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Average mileage: 151,158 (75,000–237,188)
6 model years affected: 2001, 2002, 2003, 2004, more2005, 2006
17 people reported this problem
7 people shared problem details
blowing cold air then after much trying with slide selecters a little heat then nothing.Will take to the shop soon.
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the ac only works best when the rpm is high turns off at low speepd
REPLACED NOISY A/C COMP REPLACED ACCUMILATOR AND ORRIFICE,TRIED CHARGING A/C FREON STOPPRD DISPENCING WHEN HIGH PSI REACHED 150 IT WOULD NOT TAKE ANY MORE FREON
heating truns om when ac is trun on
Heat or AC would not come out of their respective outlets,so I knew it was the blend door actuator.Ordered one and replaced the actuator all is good.
Yes, sometimes you turn the ac on and the heater comes on for a while then it will take 5 min or so and it will finally switch to cool air.
some time it wont go into coling it heat,s instead hasent ben fixed
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