Later i replaced the car s 05 trailblazer battery and the top vents quit working.
2005 trailblazer floor to dash blower actuator.
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Air wont blow out of upper vents only dash and i had the same exact problem happen with my 2004 gmc envoy a few months ago.
Safety warnings and symbols there are a number of safety cautions in this book.
Not through the dash vents.
I took it in and had to replace the motor that controlled the flap that controlled the air going to defroster feet and face vents.
According to the schematics i had this was due to the mode control door not working right.
The air would come out of the top vents when i started the car but it would start clicking then the top vents would close and all the air would come out the floor vents.
I checked codes and found a code b0263 for a fault with the mode actuator.
The actual motor was only 100 but they had to remove the whole dash and it was an all day job.
Blend door actuator locations.
Guide the center console into your trailblazer and into position.
Its near the steering column and if you have adjustable pedals its a bear to change.
The air won t blow out the dash vents.
These units can be either hanging in front of you or in a little more obscure places such as on the side the hvac plenum.
Cost me a couple hundred to get.
We use a box and the word caution to tell about things that could hurt you if you were to ignore the warning.
Connect the wiring connectors and slide the console forward.
I first ran into this problem after changing a battery in one of these vehicles continue reading 2003 gmc envoy no a c vent control b0263.
Begin by identifying the problem either defrost mid or floor or temperature modes not working.
Hvac mode actuator door replacement chevy trailblazer trailblazer ss and gmc envoy forum from what i am reading from this you can access it by just removing the lower dash panel on the driver side and laying on your back you access the actuator with alittle patience and dealing with alittle space.
It blows out the floor vent and the defroster vent but it won t change and blow out the dash vent.
Lift the parking brake to the fully engaged position.
Order chevrolet trailblazer a c heater blend door actuator online today.
Install the rear outlet duct and snug the screw.
A forum for all things trailblazer ss.
Then locate and identify the actuator to be replaced.
I think its the mode actuator.
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