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2003 chevy trailblazer_lt
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Discussion Starter · #1 ·
The Passenger Side Temperature Actuator went out in my 2003 Trailblazer. The passenger side and rear vents blew heater air instead of air conditioned air.
I removed the glove box and found the actuator to the left center behind the radio on the passenger side.

How I did it:
Unplug the actuator. Using a 5.5 mm extended socket on a screw driver remove the two screws. Now use some force to pull on the metal bracket on the outside of actuator enough to wiggle the actuator out of the plastic door gear. The old actuator has a tighter fit than the new one. I replaced the actuator, but the air was still not working correctly. So I took the actuator out again and turned the plastic door gear until I had cold air coming from the vents. I replaced the new actuator and noticed it calibrated to the correct setting and screwed it down.

Be careful of your knuckles as you pull on the bracket. Notice red stuff on the back of bracket.

Next job is to replace the vent blower for the various speeds, My #5 is out.
Then I will replace the window regulator and motor when the part comes in.

thanks to all for helping me with this job-it saved me a lot of money and will keep me cool in the Bakersfield 100 degree heat this summer.

J Baker
 

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2003 chevy trailblazer_lt
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8 Posts
Discussion Starter · #2 ·
plugging in air bag connectors

I just finished replacing temp actuator on passenger side and need to put back the glove box. My husband disconnected the air bag connectors and is not here right now. What are the steps on connecting these-I don't want it to deploy.

J Baker
 

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2004 gmc
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26,181 Posts
I moved your post here so as to not hijack the other thread about dashboard replacement.

Best safety for airbag connectors is to disconnect the negative side of the battery, wait 10 minutes, then plug in the air bag connectors. Still keep your body and tools out of the deployment region, just in case. I've never heard of one accidentally deploying here on trailvoy in four years, but you're right to be cautious.

Thanks for the temp actuator update.

On blower speed 5, you're changing the resistor pack, not the blower motor itself, right?
 

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2003 chevy trailblazer_lt
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Discussion Starter · #4 ·
The resistor thingy

:confused: I replaced the resistor pack. I found Sticky's post on replacing it. It works great now.

My next task is to replace the window regulator-but will have to wait for the right (I wanted the left side back window) one to come in.

Thanks for your help

Julie:thumbsup:
 

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2002 gmc envoy_sle
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152 Posts
Too weird! Same problems as my 2002. Crazy airflow/temp on the passenger side, resistor pack, and rear left window regulator. Whatever I get - you get. So get ready, your upstream O2 sensor is about to go south - just replaced mine
 

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2002 chevy trailblazer_lt_ext
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My 02 Trailblazer EXT is experiencing the same problem with my passenger side air only blowing hot regardless of what the temperature is set to. I would love to replace it since I live in AZ and it's starting to hit the 90's. I was wondering if you have the part number to the passenger side temperature actuator? Thanks.
 

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2003 chevy trailblazer_lt
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Discussion Starter · #8 ·
Passenger side air actuator

I do not have the part number for my 03 trailblazer. I would take out the old one to make sure you get the correct part. There are 3 or 4 different actuators behind the dash, so make sure you match part numbers.
I bought the part at the dealer, its pricey, but worth it especially if you use your air daily like we do in Bakersfield. It is a tight fit to get the passenger side actuator out, you have to get your hand between the support beam and the part itself. My husband couldn't get his hands in good enough to get a hold of the actuator to pull it out, so I got my knuckles banged up instead.

Good Luck

Julie
 

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2004 gmc envoy_slt_xuv
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4 Posts
Very Fortunate!

Well I started to tackle my passenger temp actuator repair/replacement this afternoon after several months of cooler weather finally ran out. Just as Roadie's photos showed, there is a metal strut exactly in the way of the second screw holding the actuator in place. I don't have anything to cut out an access to the screw so I just took the one screw out and then wiggled the actuator. In my 2004 Envoy's actuator there is a plastic plug on the face of the body which has a notch in it. I turned it with my flathead screw driver about an 1/8 turn and there was some resistance so I don't know if I turned the shaft inside the unit or not, but I started the truck and turned on the a/c and it is working now! Cool air comes out of the passenger vents plus the back seat vents where before hot air from hell did. I guess I freed the mechanism from some kind of bind, but I'm sure glad because I couldn't have removed that second screw without cutting some metal. Hope this helps inspire the next guy to try this before getting extreme. I know I didn't "fix" anything but it's working now and I'll take it.
 

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2002 olds bravada
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i have the same problem as you all have had, i am having a hell of a time getting the dang thing out. i cant get to the bottom left screw, so i thought that i would try to move the actuator by hand. i tried to move the round gear looking thing with a large flat head screw driver - but it wouldn't budge and I TRIED. any ideas how to get it to move, or how to manually set it on cold? I will move it later in the winter.

Please help, my car is disassembled in the driveway.:thx
 

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2004 gmc
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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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2004 chevy trailblazer_ls
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22 Posts
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/parts/Dorman-Blend-Door-Actuator/2004-GMC-Envoy-2WD/_/N-jlz79Z9pelb?counter=0&filterByKeyWord=Actuator&fromString=search&itemIdentifier=575028_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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2002 olds bravada
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3 Posts
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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2004 chevy trailblazer_ls
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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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2002 chevy trailblazer_lt
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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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2002 chevy trailblazer_ls
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26 Posts
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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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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2003 chevy trailblazer_ls
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33 Posts
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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2003 chevy trailblazer_ls
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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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