How to Replace Temperature Blend Door Actuator 2002-2009 Chevrolet Trailblazer

[@TRQ]

√ Watch the Video √ Buy The Part at 1A Auto 1aau.to/m/Shop-TRQ-Parts √ Do it Yourself √ Save Money

[@elireyes5366]

Thank you for this video! I did the repair based on this video . if you are doing this repair DON'T MESS WITH THE CENTER CONSOLE AT ALL!!!! I didn't remove it and still got the job done. The two bolts in back of the metal bracket are the hardest part.

[@samgilcrease8260]

Good job guy. Was a chevy tech for 25 years and an instructor for 20 years. Had to refresh my memory. Have an 06 trailblazer I have to do that proceedure on. Excellent work, enjoyed it.

[@nfreson]

For the bolts on the plate behind everything @4:33 I removed the floor vent tube and that gave me extra clearance so I could lay on my back on the floor of drivers side and use a 3” extension w ratchet to remove the 10mm bolts…took me a while but after it makes perfect sense. Thanks for the video again

[@PukinBigBird]

I just got quoted $2,000 for this job on my 2003 LTZ from the chevy dealer in Ft Pierce Florida but they wanted $99 to tell me what was wrong. I would get that taken off of the $2,000 tab. Now you know what a rip off most dealers are. Thank you so much for this video. Do I really need to take the center console out? Comparing this video to another that didn't take the center console out and it appears that your technique gives more access to the actuator.👌

[@TheAngryFishh]

Dealers are scammers. Toyota quoted me $490 for 3 hrs of labor to do the rear coil springs in an '02 4Runner lmfao! Merlins did it in 1 hr for $145.

[@thomasshaffer8547]

02 Trailblazer, air from defrost only. going for the blend door actuator, it is above the actuator removed in this video. This vid is great info!

[@giaellington1276]

WOW...very very clear and informative. The best yet!

[@TRQ]

+gia ellington Thank you! We love empowering our customers and showing how to perform DIY auto repairs with our high-quality auto parts. 1aau.to/m/Shop-TRQ

[@lizh5916]

Your videos are amazing, by the way. I have dine so much work on my own 04 LS because of your channel, thank you!'💚💛🧡

[@vecamilo1]

Thank you... Took me 3hrs but I got it done

[@jasonbrown467]

i have done this before and needed a refresher course, i didnt do 90% of this video. i think i just did it all from underneth, but i think there is two of them. none of my hvac stuff is working and i need heat this winter so i put a toggle switch on the blower and i am going to manaully force these blend doors to full heat for now and manually put the heat on the glass and floor

[@johnsummers385]

This Guy is offering misleading DYS information . It is not necessary to remove the center console in replacing the actuator .I'm sure that He means well , but doing it this way adds much more time to an otherwise easy process .

[@chadclark6364]

Any tips on getting to the bolts to remove the metal bracket? My top one appears to be completely inaccessible.

[@JrMiles-cb2oh]

Yes what tool is that you are using to get the back bolts

[@Rasinzz]

Great video! Does this fix the front A/C vents not working/blowing air. The dashboard vents are working but the ones on the front next to the radio, etc. are not.

[@rruizproductions]

Thanks. Was following advice from other videos and still wouldn’t work. Just needed to know which fuse it was to reset it. Works perfectly. Problem arose from car battery change.

[@TRQ]

+@rruizproductions Thanks for watching our video! 1aau.to/m/Shop-TRQ

[@THEoriginaljmelford]

When you pull the fuse to re-calibrate the unit is the key on or off?

[@smoejith9283]

I just replaced one of my blend motors.. to re-cal, put all the knobs to counter clockwise, and the heat/cold levers down. Have the vehicle shut off. Pull the fuse, wait 10 seconds and reinsert. Then start the vehicle. The re-cal will then occur.

[@robertl955]

No wonder my mechanic quoted me so much, he didnt want to do all this 😂

[@bobo_fishin_show]

Is this the actuator to change if the passenger side does not have as much heat as the driver side on a manual dual climate control system? Or is there a different actuator to change

[@tonysherman1881]

My son just bought an '04 trailblazer. The temperature control and mode knob both operate backwards. Blows hot air when on cold, cold air when on hot. Blows through vent when on defrost and vice versa. The previous owner had the HVAC control head replaced for this same reason a couple years ago but didn't fix problem. I tried to reset it by pulling fuse, etc. Nothing changed. Any ideas??

[@daleabono3616]

I've been searching videos for a similar issue. It turns out, the actuators look the same, and bolt in the same, connect the same, but they are not the same. It seems you may have the actuators mixed up, as in the wrong locations, or just the wrong actuators

[@alexgarza3133]

My 04' Trailblazer has been doing the same, my model is a 4.2 Ext version, turn your blower to #3 setting, place your temperature slider about.5 to .75 up from bottom of cold (blue) side and air flow knob facing occupants. there are 4 HVAC fuses under the rear passenger seat that has to to pulled out for a reset plus the negative side of battery disconnected....let everything set for 5 minutes. Then plug in fuses and connect negative terminal on battery, don't touch any temperature controls or knobs yet, Next, turn the car on for 2 minutes, shut back off for 15 seconds, then restart car....this should home all the vent actuators, adjust the temperature to see if it responds.... It's possible that an actuator could have a bad contact on it that's causing the cycle to mix hot and cold, I have a 05' trailblazer as well with no issues like this, just the 04' .... maybe it's a more common issue with that year model, good luck

[@alexgarza3133]

See my comment on this thread....I have a 04' as well...

[@alexinc5449]

I replace a lot of these blend door motors of trail blazers, it’s not necessary remove the center console.

[@TRQ]

+Mk D We appreciate the feedback. Sometimes there are multiple ways to accomplish the same repair. 1aau.to/m/Shop-TRQ

[@Goose-Grip]

are Trailblazer and Envoy 2004 the same do ya think regarding this procedure?

[@jameslogan1922]

On my envoy I was able to access both from under the dash with much less disassembly.

[@ElijahTheProducer]

Would this cause your A/C to not work if it’s bad?

[@jameslogan1922]

It will cause the air to not blow out of the vents. Making it feel as though there is no AC

[@HuBrIsRaDiO]

@@jameslogan1922 that’s doesn’t seem true at all. It’s called the blend door actuator. The blend doors control the hot/cold air mix that is adjusted at the HVAC controls. Some are electronic and some are controlled by engine vacuum. When bad, you will still hear or feel air coming from the vents because the actuators are have nothing to do with the blower motor for the HVAC system. Depending on the situation, symptoms may include no hot air or no cold air or rapid fluctuations.

[@brandyntherwanger5731]

So do I need to do the same thing even if the passenger side that is stuck on hot?

[@chase64745]

I used a die grinder with a cutting wheel to cut just enough of the frame out of the way for the passenger side actuator. You drop the glove box down and after cutting the frame it was an easy install. It stopped working today and after resetting the fuse again it seems to work fine now so im wondering if thats all I needed to do to fix it to begin with and wasted all that time and money.

[@angelf9800]

What does the lower one controls, I see 3 of them.

[@richardcornelius1050]

The other two control air flow to the drivers side and the vent air damper door. There is also one on the passenger side for the passenger side air selection or when switching from ac ducts to heat ducts in colder weather .

[@JuanGarcia-wy9ch]

What is the name of the actuator I need to replace? Having issues with the vents not blowing air only blows air from defrost & floor, every time I turn on the ac.

[@JrMiles-cb2oh]

Main actuator that is the one where the whole dash has to come out smh

[@rahmanjubain5906]

I did the job, but for mode door actuator. After the calibration the actuator is ticking when out to the front vents. What could be the problem ?

[@ltgoddk]

So would this fix me not getting heat to drivers side?

[@Nastuf]

The hardest part for me was getting those 5.5mm screws back in but then again I didn't remove that last metal bracket either so made it more difficult for me.

[@ioe12]

Blend door or mode door I was thinking blend door mixed temperature from evap and heater core mode door position moved from floor defrost face blast exc.

[@d.cent1326]

Does this part going bad affect the ac blowing cold?

[@johnlow9486]

good video , time consuming, got it done.

[@mshields321]

If you look direct above that actuator, you will see the upper actuator for the top half of the blend door system. This is the bottom or know as rear blend door actuator.

[@jimjones755]

Why can't i find the blend door itself for the rear hvac? Im so sick of looking and finding a million actuators and not 1 single blend door!

[@jameslogan1922]

I suppose I made a mistake. I removed two actuators at the same time and although both are defective they got mixed together and I don't know which one to put in what place.

[@JacobDaniel-gz1th]

Wish I knew where those mysterious bolts are that you have to remove to get the metal pieces out. What does that metal even do? I attempted to rip it out with brute force but that didn't work out. Also, Chevy quit making fasteners out of the brass-looking pot metal! The E5 part of the studs just broke right off.

[@jamessmejkal8803]

Due to back problems I am going to have to have a mechanic replace mine on my drivers side actuator, but it "looks" easy.

[@aboundingpassions2430]

How do you rotate the actuator?

[@andrewcaruso9246]

you dont. you rotate the blend door to match the actuator then re calibrate it

[@jameslogan1922]

I don't think you actually rotate the actuator,at least not the part. You have to move the shaft that it slips into.

[@yanceybenitez315]

Ok I just installed the actuator not knowing to rotate the blend doo. ima see what this blend door look like

[@zerotolerance1261]

I can’t get the actuator to line up keep turning it can’t find the spot

[@wild8757]

As far as I know if you have the automatic climate control there’s a left main temperature and a right main temperature actuators, The vehicle he’s working on only has manual controls so I believe there’s only the one he just replaced?

[@Charliegirl2]

This is so complicated.

[@kismofer1]

this method same as 06 envoy denali XL

[@kingaudio6464]

The GMC envoy is just the GMC twin of the chevy trailblazer, kind like the dodge stratus and the Chrysler Sebring, same vehicles just different badges