HVAC Passenger Temp Actuator Replacement - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #11  
Old 07-29-2010, 08:27 PM
the roadie's Avatar
the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
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Join Date: Apr 2005
Posts: 26,181
The internal motor is small, so like all actuators, there's a multi-stage gear train. You can NEVER push back against a multistage gear train and win. You'll break things. If you're talking about the thing I think you're talking about.

You can try pulling the HVAC-B fuse as if you're doing a reset. Then plug it back in and turn the key to RUN without starting the engine. That will start the recalibration process and if you're lucky the actuator will go one way then the other and you can have somebody pull the fuse at the exact spot you want the gear in. Then pull the connector off the actuator and it will stay there.

There's a way to run the actuator using clip leads and a 9V battery when the connector's disconnected. I should write that up sometime when I'm home, and not on a business trip like now.



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  #12  
Old 07-31-2010, 01:26 AM
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Evader71 Evader71 is offline
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2004 Chevy TrailBlazer LS
Silver Mist Metallic 4.2L I6 4X4
Join Date: Jul 2010
Location: Chesapeake, VA
Posts: 22
I'm looking to replace this in the next couple... Could someone possibly confirm this would be the correct part for the passenger side.

Dorman/Blend Door Actuator
Part Number: 604-106

http://www.autozone.com/autozone/par..._158882_13424_


After removing the actuator I was actually able to slighty turn the small white knob which the actuator slides onto until cold air flows but I will be replacing soon and want to ensure I purchase the correct part the first time out the gate.

I also was wondering once I install the new actuator if I should remove the fuse or do any type of calibration process or if this is a straight forward plug and play..turn the key and the climate control will be functioning as it should.


Thanks always for all your help and so happy to have found such a great site.

-Brad
04 Envoy XL I6 2WD
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  #13  
Old 08-02-2010, 03:01 PM
drewlandoll drewlandoll is offline
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2002 Olds Bravada
Monterey Maroon Metallic 4.2L I6 AWD
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I tried the reset, but the actuator did not move at all. No luck there.

i'm still curious how you guys are getting the actuator off?.?. Are you removing / bending the metal brace that is in the way? I haven't taken out the stereo, and tried from that angle - Is that how you are getting in there? Maybe more pictures would help, if anyone has them.
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  #14  
Old 08-02-2010, 04:59 PM
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Evader71 Evader71 is offline
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2004 Chevy TrailBlazer LS
Silver Mist Metallic 4.2L I6 4X4
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Location: Chesapeake, VA
Posts: 22
I pulled out the stereo and with some effort I was able to reach the bolt that is hidden behind the support bar. When putting the replacement in I actually chose not put that bolt back in for easier access should I have problems in the future.
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  #15  
Old 08-04-2010, 07:57 PM
swahba swahba is offline
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2002 Chevy TrailBlazer LT
Fire Red 4.2L I6 4X4
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Location: Baltimore, MD
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Just a quick question guys. I've been lurking for years and you guys have helped me countless times.

I'm sure I have the same actuator issue. I'm just not sure which one I need to change.

All my vents, including the rear, blow cold air except the passenger side floor vent.

Thats still the passenger temp actuator right?

Thanks again guys
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  #16  
Old 08-07-2010, 10:43 AM
modtour4 modtour4 is offline
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2002 Chevy TrailBlazer LS
Black 4.2L I6 4X4
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Location: Mystic, Ct
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I just replaced mine this morning on my 2002 LS. Took about 10 minutes.

No need to remove anything!!!!! Glove box has a catch at the top (just to the left of the DELPHI sticker in pic 2 by Doug), push it up and glove box swings down to the floor.

Actuator is held in by two screws. One on top (easily reached) the other is behind the brace. Drilled hole through both up angles on brace, so you can reach the screw (pic 1 by Doug). Actuator pulled off very easy!!!!

Once off, you'll see the white knob that rotates the flap. I had to take a pair of channel lock pliers and bend the up angle of the brace to get the actuator in. Only need to bend a little. Put the two screws back in, hook up connector and turn key to see if actuator works.

Really very easy.

Hope this helps

Russ
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  #17  
Old 08-07-2010, 01:24 PM
joepa15425 joepa15425 is offline
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2004 GMC Envoy SLE XL
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yet another question about actuators and HVAC

ok. changed batttery. Vents stopped blowing and only got air from floor or defrost. Found the floor actuator and turned it to vent then unplugged power. Now only vents blow. Simultaneously, or around the same time my AC stopped getting cold. Hard to tell cause this problem happened in winter. I took it for a freon charge. Was told it needed oil flushed. Oil was flushed and new freon charge given. Pressure held but no cold air. The accumulator/scrubber doesn't get cold, yet the system expels condensed water. I was told that the accumulator is bad and needs replaced and a valve/filter/??? that goes in the hoses. A tube/therometer looking thing about 3 inches long. Any ideas???? is the acutator that causes this or is my lack of cold accumulator and other pipes/hoses a result of the temp actuator? I should note, the passenger side is slightly cooler, than drivers. The air is niether really hot nor really cold on either side..just slightly cooler on passenger side.
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  #18  
Old 11-20-2010, 10:13 PM
boatpimp boatpimp is offline
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2003 Chevy TrailBlazer LS
Sand Beige Metallic 4.2L I6 4X4
Join Date: Oct 2010
Location: Richmond,Va
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Perhaps something that may help TVers.
It seem that I need to replace both my temp door actuators at ~ 115 each. There seems to be some discrepancy on part #s for these items, check carefully. I had 3 sources give 3 part numbers.
-My passenger side actuator was more difficult to get out than the OP. ? Not only did I have to hole out my the framing member to remove the screw, I also had to cut that framing member and pull it out of the way to get the actuator off the shaft. There was not adequate clearance to get the motor off the shaft. -We were able to get the driver side off, but that req'd a 300lb man pulling on a framing member to get clearance to remove.
Best of luck with this sort of thing folks.
-Mark
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  #19  
Old 11-20-2010, 11:50 PM
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the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
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Quote:
Originally Posted by boatpimp View Post
There seems to be some discrepancy on part #s for these items, check carefully. I had 3 sources give 3 part numbers.
SP what part number did you buy and install, so I can correct my diagram if it needs it?

[IMG]******************************************[/IMG]



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  #20  
Old 11-21-2010, 12:07 AM
boatpimp boatpimp is offline
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2003 Chevy TrailBlazer LS
Sand Beige Metallic 4.2L I6 4X4
Join Date: Oct 2010
Location: Richmond,Va
Posts: 33
Due to the confusion over parts, and the fact that truck is disassembled at the shop, I will post this information when I have installed functioning parts. Your diagram may prove to be correct. I honestly can't remember what part # I ordered, there was much consternation from varying sources over the part #.
Happy trails.
-Mark
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