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Premium Member
2006 Red Jewel AWD
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11,641 Posts
Discussion Starter #1
Before I broke the motor, I noticed that no matter what I did to the controls, the HVAC system was stuck moving air from the defroster and lower heater vents. The dealer diaged it as the mode door actuator, anyone have info on how to get to it in the center console and replace it? Any need for a Tech II to do any reprogramming, or is it a simple swap?
 

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Premium Member
'08 TrailblazerSS
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4,146 Posts
Yes I do Jay...are you coming to the rescue with instructions for me??? :))))
I can walk you through it, but I'm telling you it's a pain in the ass with the power pedals. Not a lot of room to work in there and there is a gear drive that you have to get the teeth aligned correctly and the only way to see it is with a small mirror. I usually sneak them in and out through the driver side underdash area. Sometimes it goes ok (but still a pain in the ass), other times they fight me tooth and nail.

I can dig up the service procedure out of the manual if you want to PM me your email addy.
 

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The one and only JJ
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14,071 Posts
Steve, i have the same problems and its been doing it for about 3 months now, lol.
All my air is coming out the defroster and the rear vents for back passengers. Once u get yers fixed bro u can fix mine and if im visualizing this right it will be the perfect time to give it to u up yer ass where u like it, lol.

Jay u need to post the instructions in here rather than PMn everyone! lol.
 

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Premium Member
2006 Red Jewel AWD
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11,641 Posts
Discussion Starter #8
JJ, you want it fixed, I'll fix it...but if you come anywhere near my ass, I'm likely to stab you in the face with a screwdriver!:D
 

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Premium Member
2006 Red Jewel AWD
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11,641 Posts
Discussion Starter #9
Jay,

thanks for your help with the procedure, although it's very vague, it wiled! The hardest part is holding the new actuator in place and using one finger to make sure the notch on the actuator gear matches the tab on the door gear!

Took me about an hour and a half and didn't remove the floor vents like called for!
 

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Premium Member
06 AWD SS
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4,200 Posts
Hey I need to do the same thing and I'll need an exploded view or a walk thru if you can. Anyone got a part # for the actuator? I'm not droppin $900 bones to have someone else do it.
 

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The one and only JJ
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14,071 Posts
I just had Dealer fix my door actuator for free and part # i see on my paperwork is...

89018675 Actuator
19180158 Sensor Kit - Not sure what part this is for but its on my Invoice!!
 

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Premium Member
'08 TrailblazerSS
Joined
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4,146 Posts
Jay,

thanks for your help with the procedure, although it's very vague, it wiled! The hardest part is holding the new actuator in place and using one finger to make sure the notch on the actuator gear matches the tab on the door gear!

Took me about an hour and a half and didn't remove the floor vents like called for!
Good deal Steve! Glad you were able to get it done. Yeah lining up the tab with the cam on the door acuator is really the biggest bitch of it all. Pulling the floor vent is super easy so I don't mind getting it out of the way just to make it easier to move around under there. Glad you got it done Bro!

Hey I need to do the same thing and I'll need an exploded view or a walk thru if you can. Anyone got a part # for the actuator? I'm not droppin $900 bones to have someone else do it.
Holy Crap!!! That quote is higher than giraffe's nuts!! Sounds to me like they overshot that estimate by a good couple hunderd dollars.
 

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Premium Member
2006 Red Jewel AWD
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11,641 Posts
Discussion Starter #16
My dealership wanted $750 to do it, it literally took a single hour's worth of work! A local friend of mine got his done 3 months ago and it was the same price...
 

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Premium Member
TrailblazerSS
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2,020 Posts
I seem to always have air coming in from the lower ducts too. Even when it's off. I still have normal controls and it separates it from top to bottom... Any problems or is that normal?
 

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Premium Member
'08 TrailblazerSS
Joined
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4,146 Posts
I seem to always have air coming in from the lower ducts too. Even when it's off. I still have normal controls and it separates it from top to bottom... Any problems or is that normal?
Brandon, i'm not sure if this is what you're talking about but there will always be airflow of some sort through the HVAC system as per federal law even when it's off. The blower motor will not operate to supply the ventilation air, but the high pressure air in the cowl area (the same type that a cowl hood takes advantage of) is what makes the airflow. It's got to do with interior ventilation and supplying the interior with fresh air while underway. Usually that ventilation airflow is directed to either the defrost or floor when the system is off.
 

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Premium Member
TrailblazerSS
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2,020 Posts
Brandon, i'm not sure if this is what you're talking about but there will always be airflow of some sort through the HVAC system as per federal law even when it's off. The blower motor will not operate to supply the ventilation air, but the high pressure air in the cowl area (the same type that a cowl hood takes advantage of) is what makes the airflow. It's got to do with interior ventilation and supplying the interior with fresh air while underway. Usually that ventilation airflow is directed to either the defrost or floor when the system is off.
Ahh I didn't know that. Well I'm sure it's fine then. Thanks Jay!
 

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Premium Member
06 AWD SS
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4,200 Posts
$920 dollar quote from my lovely local GM service shop for a part that shouldn't go out just because you unhooked the friggin battery and it shorted itself. Unfuckingbelievable that GM puts shit like this into their cars and does nothing about it when someone's out of warranty. I told the service writer that he was out of his fucking tree and theres no way I'm getting it done thru them, it seems to be one fucked up stupid failure after another with this truck and if it continues I'm done with it and I'll go buy a Jeep SRT.
 
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