GMC Envoy HVAC actuator Replacement 

I thank you for this video, I watched several videos on this subject, yours was the one that I kept going back to. My local Chevrolet dealership charged me $135.00 to check out the problem with my 2003 Chevy Trailblazer, the estimate to replace both the Defrost Actuator and Mode Actuator was $1,080.46. I was able to complete the installation my self for $146.00 buying my Actuators from the NAPA store here. I can't say it was easy for me, since I am 75 years old, but it gave me a great feeling saving the money and learning, I ain't to 0ld to learn.

Thanks man. In the heat of the summer here in Houston , the wife and kids can actually go places now. Was only blowing out of the defrost and floor board. I just took the actuator out and switched it over to the front vents.

I followed your instructions on how to re-program the HVAC system and it worked very well. Thank you. You saved me a lot of money and time.

Thanks for the walk through, fixed me up. Ended up replacing that second one, closest to the engine. Now I've got air blowing thru the face vents again.

I know this is an older video, but I want to thank you for your awesome thorough step by step fix on the AC. My 2003 Envoy sat for 2 years. New battery and AC stuck and wipers stayed on. I wish I could just take it to you. Again thanks a bunch

I replaced both of mine yesterday, I’ll tell you being claustrophobic I almost went crazy replacing them.

This just saved me a BUNCH of money!!! This was a VERY easy job and the blend door actuator was only $61 from O'Reilly. Thanks, pfun41!

The recalibration worked for me on the second try and I did not have to replace the actuator!! 2008 GMC Envoy. Thank You Very Easy to Follow!

Great video. I unhooked battery cable and sure enough I had air blowing on the floor only, no matter which mode I selected. I re-watched this video and re-calibrated it. It took another off and back on using the key but it fixed it. Thanks for the help and saving me a wad of cash.

you tube is great, but the fact skilled fellas take the time to make these great helpful videos is unbelievable. Thank your Sir. the calibration part worked like a charm. Best regards.

Awesome video! Glad you showed the recalibration step by step in addition to actuator removal. Great job on explaining why the part needs to be replaced as well as symptoms. Might be the best explanation of this process on the web yet. Nice!

this video saved me about 1200 dollars. my vehicle was having the same issue. Thanks to you I'm more of a do it yourself kind of guy

This video saved me a lot of money, headache and time. recalibrated and front vents work fine now.

I recently got a new battery. Afterwards, the passenger side blrew hot and the passenger was cold. I needed to recalibrate the actuator. This video was helpful, but it was incomplete. We had to start the engine with the fuse out. Then turn off the engine and replace the fuse. It worked great!

This video was extremely helpful especially when he shows you how to tell which actuator is bad. Thank you for being very handy for myself at least

Changed my battery out over the cold winter and lord and behold…had that clicking noise. Thought it may of been the CD player, because it stopped after a little while. I will try the reset, if not that, I know know how to change out the actuators. Thank You so much….Your video was a great great big help.

i too own a GMC Envoy. I bought used and never had A/C . I heard this clicking after i replace the a/c line and this is when i was lucky to find out the compressor was bad replaced it and now i have this problem. When will this ever end. I have found out the hard way that these Envoy's. have about of small problems and keeps pulling money out of my pocket. And im not even going to get started about the problem because if you got one y o u know. Thanks You-Tube. and thank you for the people who take there time to try and help

Thank you so much i did what you said and my heater started blowing from all my vents i tried some others and they didn't work again thanks 100 times!!

Hi! Your videos are really helpful. Thank you so much for sharing your knowledge. I have a 2004 Buick Rainier. Air is blowing, but not out of the front vents, and there's no clicking, so I was hopeful recalibration would work. I recalibrated by pulling and reinserting fuses 36 and 39, but that didn't work. You mentioned a second method of recalibration, but I think (could be wrong) you didn't share what it was. What is the second method (if you don't mind sharing)? Thank you!

Just wanted to say thanks. You just saved us quite a bit of money.

Pfun41 Thank you for the help. It was the resistor that went bad.

@Mathew Conniff You might've missed the part at 13:22 where he mentions that one of the other actuators had failed silently. Yours may have failed without generating any noise as well.

Dude you are a life saver by far the best video and the links to the parts was awesome - Thank you

Your video helped out a lot of people including myself. Thank you, Richards Auto and Air

Thanks for the video! Have a happy 4th! Mine will be cooler now!🎉

The white arm is needed for the 89018675 for the GMC 2003 Envoy so don’t take it off install as the one you’re replacing. Otherwise. your instructions were spot on.

Your instructions are very helpful

the mechanic want to charge me $500 to fix my problem, my truck was blowing hot air from the driver side vent and cold air from the passenger side vent, I calibrate the way show in this video and my problem when away , Thank you very much for this Amazing Video.

Thank you very much, this worked for me.

Thanks for the help. Mine only needed the fuse pulled.

Great detailed information... Thank you...

thank you for this great video

Thank you very much ended my problem the easy way

Thanks for the video it's awesome I have an 2004 envoy but it's all manual knobs to switch everything first I couldn't get mine to work on defrost only front dash vents and then suddenly it would only work on 1-4 speed settings and then 1-3 and now none so I think I need to replace blower resistor as well as some actuators but first I will do the resistor and try recalibrating and see if it works if not I know I need actuators thanks for the video

Thanks for the great video. How did you line up the mode door actuator with the flap door gear? My 2007 Trailblazer shop manual says to center the flap door and center the actuator. The problem is the mode flap door seems to be spring loaded into the closed position. There is no way I can hold the mode flap door in the centered position and install the actuator with one hand. Thank you for any information you may have for installing the mode flap door actuator.

how did u get the white gear off the mode actuator under the dash cause I just did mine and couldnt get it out cause of the white gear being stuck behind the plate

excellent video. thank you!!

My ac only blows on the driver side of my 2002 Bravada. Which actuator needs to be replaced?

Great video...well done!

Awesome video def helped out thank you very much!!!!

Thank You! Great video.

I own a 2004 Envoy XL. The blower vents all function except the one which blows into your face. I went to the back seat & was unable to lift the seat to expose the fuse panel as shown in this video. I did find a fuse panel just under the hood behind the battery. There was nothing in the fuse map as described in the video. So in the attempt to cause the AC control system to recalibrate, I disconnected the positive side of the battery for 10 seconds then reconnected the battery. I turned the ignition key on as shown in TV he video to recalibrate the AC actuators. I still have the same problem.

Thank man i fix my tb With your help, its Hard to remove the firts one near to the floor.

How did you get the plastic duct work out? 04 blazer. It's wrapped around the brake pedal. It's lose but idk how it works its way out. In other videos it just pops right off and is not wrapped around

Very helpful video, looks very simliar to my 2002 Trailblazer. But one thing I don't understand is why do you need to calibrate it before taking it off?

How did you actually get the white peice off the new actuator? I don't see a clear way to remove it. Thanks for your help

Excellent,detailed video!!!!!!

how to recalibrate the actuator and how to know we take the right one?

my envoy blow air on defrost vent,floor vent and side vent only front vent not work please which actuator need To reemplace.

Which one is the one that controls the one for the floor heat

Are they both the same part number?

Much helpful...I will apply same on my Chevy blazer 2008 4.2l and let's see. In my case air blowing thru just floor & defrost up on wind shield.

Good afternoon. My husband and I have a 2003 GMC Envoy XL which we put our truck in the shop to fix the driver side of the truck because no hot air was blowing out only cold. Once we put the truck into the shop we received the truck back with the driver side working but now the passenger side doesn't blow hot air. In Sutton to the back send to either not work or blowing very low. My husband and I are going to try the methods mentioned in this video and let you know if it works. However, we do not hear any clicking noise. I will post another comment to let you know the results. Thank you for sharing. 😊 I do have a question about a noise coming from under the hood either when you start the truck or when the truck is in park. It used to be quiet once in neutral but at times it starts to be noticeable. Are you familiar with this issue and have a solution or video to show the problem and how to repair?

I have problem on GMC ENVOY 2002 its engine have no noise and ac working great but after some days if i turn on my ac then some noise in coming with my engine like tak tak tak but ac working good some machinic told my to replace the compressor but some machine told me this is compressor wire sound so what i do ??

Thank you so much for this video. Thought I needed a new actuator but just needed recalibration. Thanks so much.

How can I determine if the floor door actuator isn't working due to a faulty actuator or if the dial on the control mode isn't working? I bought both but would like to only replace the actual problem.

i have envoy 2005 front vent not work wich actuetor is for reemplace

OK so my 2003 Envoy XL SLE Kept defaulting to defrost ducts. When I got in there and looked at the actuator, there were 2, 1 closer to engine, the other closer to center consol. For me it was the second one closer to consol that kept flipping back to defrost ducts. I removed it and manual flipped the doors to dash panel ducts. To my surprise everything works as it should. Switch knob to defrost ducts and it sends the air that way, switch back to front panel that works to. Rear hvac control.. all seem to work as they should....WTF that second actuator is doing is beyond me. My only concern was that the control doors might flip back to the defrost send without the actuator in place to hold it. I decided to take the actuator apart manual turn it so the gear lined up to hold it in the front panel position, I re installed it and did not plug the power in to it....all is working fine

Mine clicks when you turn it on or off, and if you put it on heat. It doesn't click when on AC, and I have air blowing out of all vents. Which one would that be? Also, I bought this car (04 Envoy by the way) used, and the roof blower vents have never worked. What can I do to fix those? Thank you so much for your videos!

loved your video, very helpful but I'm stuck... I have removed all the lower panels & can see the actuators but can not get to them do to the gas pedal being in the way and the plastic vent is behind the pedal instead of in front like the one in your video, any tips? (my truck is a 2004 GMC Envoy XL SLT)

I’ve replaced both actuators. No change, defrost vents only. Any other ideas. Is there a module for the climate control that’s possibly failed??

I had to unplug battery to replace the water pump, put it all back together and my 05 envoy had this issue of not blowing out front vents only dash and floor (back air works fine). Tried these steps to reset for calibration, didn't fix the problem.. I heard it calibratingand waited 2 minutes of so... still having the issue :(.

what size sucket did u use to remove actuator bolt off

When running the calibration process all 3 actuators are supposed to move, found one on mine that wasn’t moving, sounds like the control board in it is dead

I know this is an old video but I have a 2005 GMC Envoy XUV and the heat doesn't blow out the front vents now but it does out of the back vents located behind the arm rest and center console. So Im guessing that the heater core is ok since it blows hot in the back and it's not the blower motor since its working back there so it must be the actuators in the dashboard? Im just trying to narrow down the issue before I take it to the shop. Any ideas or help would be greatly appreciated. Thanks.

mine goes from floor/defrost, to defrost, to floor, just no dash vents... help

Actuator with the white thing, I can't get it back on. Door position is so air comes out of the vents on front, what should the position of the white thing be so they mesh up?

hi, is there a chance by removing the old actuator breaking the shift? was it difficult to turn the shaft to line up the new actuator?

With my 04 trailblazer I had air coming out the defrost and floor only. This was after I replaced the battery. Replaced the actuator that was up the highest and that fixed the problem. With my trailblazer I left the gear on, it meshed up with a corresponding gear inside. This video does a good job showing you what to do, it's not that hard of a job and would take a moderately skilled lay person about a half hour to an hour to do themselves, FYI.

This may be ignorance on my part, so I apologize in advance. There are 4 AC Actuators on the 04 Envoy...are all of them the same part number that can be used in different locations, or, are they 4 individual part numbers?

Great video, do you know which activator would cause Passenger side to always blow hot and driver side vary with controls. Did have clicking before but it still worked properly but now it stopped and heat always comes out passenger, so I assume it finally failed. Also has rear AC/Heat but only get cold air out top vents even when on heat.

How do I know which one? I have clicking in the dash. And it completely stops air or heat from coming out. Heat itself is hot but won't come out. Also it randomly turns on and off

ok so which one is the one for the door acuator for the front vent the one in the back that u pulled out first or the one that is right in front of it cause my a/c won't blow out of the front vent only the defrost

thank you so much! finally a fix. i will be dling this shortly thatclicking sound is HORRIBLE

My 05 envoy denali, the ac stopped completely. No air from vents, no defrost and no heat blowing. I replaced the blower and it worked for a week and now i have nothing at all. There is a little creaking sound when i push the ac button but still no air flow at all.

Thank you

Thanks for the helpful tutorial. Do you have the part number and approx cost?

Ok so both defrost door actuator and the one in front of that are IDENTICAL parts? Should I just order 2?

Question How do you know which actuator is bad I am having hot air coming out from the drivers side and cold on the passenger side and I have it set on cold

When the clicking sound happened I thought he started playing Hot For Teacher by Van Halen

good video...thank you

what happen if you don't hear no noise from the actuator but air go"s every wear but the front vents ?

Do you recall what size socket used to remove the actuator?

You do a good job explaining, but you need to find a stand for your camera, and figure out a system for lighting what you are filming. (maybe an led light strip?) There are way too many sections where I could see nothing.

Unfortunately mine had the white part on it and the new one didn't. I installed the white part from the original but for the life of me I can't get it to go in.

I disconnected the battery to replace coils and spark plugs and after that my front vents won’t blow. When I try to recalibrate I will pull the fuse for 10 seconds and turn the ignition on (but not engine) and it will suddenly go black on the dash and shut down. it will lock my key in where I can’t get it out until I disconnect my battery. Only then can I get my key back and the ignition to come back on. Any ideas on what’s going on?

Hi - how many actuators does the Envoy have? I hear lots of clicking and no air comes out of ANY vents including feet, face or defrost......How many actuators do I need to buy if I want to replace all of them? thanks Nicole

thank you sir

What if I don't have clicking but it has all the other symptoms. It was working properly a few days ago then it just stopped switching blowing locations

Good job

i fucking love you. got my AC jumping

Our 2006 envoy only blows cold air from the passengers side. I read that there's 4 actuators. Which one should I replace?

Just out of curiosity, would the actuators be in the same location for a manually controlled HVAC setup?

My problem is same make and model is that when im driving the ac wont turn off it just keeps blowing air i can change where the air blows out but i just cant turn it off... what can i do AC stays on when driving and wont turn off.. BUT IT DOES turn off when i shut off the envoy. Pls help

I need to remove the temperature control module. How do ya do that? Can i take off the facing on the dash?

I being struggling with my blend door actuator on my Chevy cobalt Lt 2009, I took it off but I don't think that that one was the correct, because the new wich is exactly as the one I took doesn't fit, what happened if I just don't put it, what bad can happen???😣🤔

I'm not looking forward to this repair but thanks a lot for showing me how

I've been having a problem with my a/c, the drivers side works perfectly and the air comes out cold, but the passenger's side, the air comes out hot, no matter how much i turn down or up the temperature is still comes out hot and warm, I dont know what to do, can u help pls?

how did you remove the white arm out of the actuator? I tried pulling on it and ended up just snapping it off.

would the one in the rear cause front vents not to blow????