Thank u for the valuble vedio. One step needs to be done before that is to recalibirate the actuators. I unplugged the hvac batt 10amp fuse for 1 to 2 min and put it back. Run the car for 2 min with ac off. Turn off car then start again and turn on ac. And it worked.

Geez, finally got it. Thanks for the help. You forgot to mention that you have to stand on your head to do this, lol.

UPDATE: had to replace same motor AGAIN!, though it was acdelco. Read comment below from other guy! YOU DO NOT NEED TO MESS WITH INTERNALS OF MOTOR. IT AUTO CALIBRATES! SEE THE COMMENT FROM OTHER GUY WHO GIVES FULL DETAIL! I used 5.5 socket and small channel lock to get top bolt off. Use finger to push socket on and other hand with channel lock to tighten. Also the duct that sticks out two inches under motor can be pushed down to be angled out of way. I also removed black bar. 3 bolts 13 mm. It is wedged in there. Removing metal plate and bracket to the right of metal bracket under steering column helped as well. If you bought actuator without the cam or black peace you can use a bolt about 3” long to pop the cam out of old actuator. Just use a hammer and vice to hold old actuator. Make sure you remember the orientation of old motor on cam. I used a c clamp to press on new motor to the old cam. Once it is on it is very difficult to remove. MAKE SURE YOU TAKE A PIC OF OLD MOTOR ON CAM FOR REFERENCE. had to put cam and motor together because pushing it on under the dash take way to much force unfortunately. Hope this helps someone like me who was pissed off for the last couple hours. This was on 99-2000 Silverado 4.8 4x4

This video is very clear and easy to understand. You saved my bacon on two things. One: I carefully removed the motor and left the cam in place. Two: I manually set the cam to, DEFROST, and left it on while installing the actuator. When done I: One: Removed the fuse for 10 minutes. Two: Re installed the fuse. Three: Turned the key to run position and let all the actuators talk back and forth with the computer. It solved the problem. I have now replaced all three actuators on my 2004 suburban with 220,000 Miles. It is a fine towing machine so I think I will leave this world before it does. Thanks Noel Reuland

2004 Chev Tahoe: I purchased a replacement actuator with attached gear plate. I unplugged the harness, removed and replaced the unit. I disconnected the battery and waited 10 minutes. I reconnected the battery and plugged the harness into the unit. I started the vehicle and let it run for a while. No problems - it re-calibrated and settled in the position corresponding to the panel control.

Thank you. Your video was spot on. The tip about moving the cam bracket position to defrost was the trick. I now have a working unit again.

Great video, best one for GM that I have seen. You do a great job of capturing every detail needed for this job. Helped me tremendously thank you for your time.

Thank you I have been trying to out this all back together since last summer 😂

You are much better than most. Clear precise and extremely informative. Thank you from Mississippi

You saved me a $500 quote at the garage. Thanks for such a thorough video!

Thanks for the video. I got my mode actuator changed. Wasnt comfortable but I did it from the floor underneath. I didnt remove the cam. Took about an hour . Has to tape the screw to the socket to get started

Aweseome video. Fixed my 2003 GMC Sierra. Pain in the arse but I think I found a couple of tricks to make it a little easier. First, if you turn the blower on before you reinstall motor, the air pressure will hold the door in the defrost position for you. Second, if you open up the new module you can easily lift the second to last gear in the little box so that the last big gear rotates freely. This allows you to set it in the defrost position and pop it right into place. Careful with doing that as the last gear is connected to a feedback potentiometer that needs to be rotated with the gear to stay in range. Had no issues with the computer recalibrating the positions after doing this.

Thank you for your description of the cam bracket and placing it before the motor. I installed the selector motor incorrectly and your video helped me to install it correctly.

Great video. You can pull the HVAC fuse for a minute, then plug back in and key on, then the system recalibrates to the new actuator. Do not force the plate to any new position, it will damage the gears.

Good job. Got mind working. Put in defrost mode disconnected battery. Worked fine. Thanks alote.

excellent, i got all working because of your suggestion about setting defrost on the dash to on. then remove the idler gear inside the actuator motor housing so it can be freely moved to approx the 9 oclock position in relation to the cog wheel and voila. the damn thing went together without a hitch and all is functioning correctly. thanks again my man ! also i should mention my truck is a 2000 silverado with manual air not auto temp. good luck to everyone else

The one thing that kept messing up my install was the white gear off the HVAC box was rotated. I couldn’t get the gears synced resulting in only air in the dash and defrost vent. No bottom vent air. The solution was to manually rotate the white gear to approximately the 6 o’clock position. Then everything sat flush and it now works perfectly.

Thank You! I looked at a few videos and yours was the clearest. I was concerned about getting it synced up but your comments and demo was Great! Thanks again.

Thank you for the tips.. replaced mine yesterday and your tips helped.

Hey man Thankx for the video. I know it’s been up for awhile but it’s still helping folks!!!

This video was extremely helpful. Thanks for taking the time to share.

Save yourself a hassle. Disconnect the negative on the batt. Replace part carefully, screw it down then plug it. Give it a few secs so it recalibrate. Worked like a charm for me. Easy peasy, part #604-113

Super video!! A couple of tips if u don’t want to disassemble big slotted guide from actuator. U can get the geared one in the slot first. Even to the point of starting lower screw. Then take about a six inch piece of wire and move the top white one into its slot. I didn’t want to separate the guide from the actuator. It takes a little wiggling to get the top one in.

YESSSSS!!!! Thank you my man. Spote on with the moving to defrost before plugging in secret. I spent 2 days fumbling around with that stupid thing like it was stupid. Thank you again. I have not tried it yet but I will try it soon and post my results here. Thank you!

Thanks for the vital info! Its got up to 100 degrees out here and a cold defroster isn’t cutting it

Hardest part is getting it lined up to put the motor back on, so it'll lineup with the screw holes

Thanks mate! I have to replace the actuator and this video helps a lot!

I spent 4 hrs trying to get that thing synced up, i swear its impossible. Best i could get was defrost and defrost/ feet settings. Hats off to you for figuring it out cause i sure cant

Thanks. Worked for me on my 2005 Silverado 1500. Appreciate it man!

You are a lifesaver, my friend.

Thank for the in-depth explanation(s). I've watched 4-5 videos "similar" to your but no one mentioned syncing the hardware with the computer. Sounds like you might have been short a hand or two during the re-install. I'll have to watch this more that once to get it all. THANKS!

The guy means well but DO NOT FOLLOW HIS ADVICE. Cost me a few hours of frustration and almost $80 for another actuator. The new actuator doesn't care what mode you're in. It self calibrates then moves to whatever you have selected on the control. 1. Remove the old unit with the two bolts. They're annoying but with a small extension you can get to them both. I disconnected some of the ducting to give myself a little more wiggle room. Then unplug the electrical connector. 2. DO NOT DISASSEMBLE THE NEW ACTUTATOR. They are set from the factory to go into a calibration mode the first time they're installed. If you disassemble (or worse... power it up before it's fully installed) the unit is a paperweight. 3. Install the new actuator. The black guide/stopper on the vehicle should go on first. Then make sure the white gear section is in FRONT of the black actuator area. If the gears are not touching that is okay. From there manually adjust the other white adjustor door (one closer to the firewall) so that it lines up with the actuator groove. 4. Reinstall the two bolts and make sure there isn't wiggle on the unit itself. 5. Plug in the unit and start the truck (give it at least 30 seconds to cycle through before adjusting the HVAC or turning off the truck). DO IT THIS WAY NOT THE WAY THE VIDEO SHOWS. I did that and I wasted 4 hours. I did my 1-5 procedure and it took 15min. Again, the new actuator doesn't care what mode you're in because it will self calibrate upon initial startup. So long as the two door adjusters are on the actuator plate (again the firewall one should be in a slot and the front-most teethed one should be in front of the actuator backing plate) it'll do its thing without your help.

Thanks This Video Made My Installation A Lot Easier

Thanks a lot very good explanation!

Thank you for your video. You saved me hours. of headache.

Love how you open it up and showed us ...u are awesome! U got a like from me !!

This video is a great heads up!! My 2004 Silverado would freak out and get stuck. When my AC would blow out of the front, I could hear a clicking/knocking noise and my floor vents wouldn't work. Setting that cam gear in "center" position is key.

I am holding one of these in hand right now, a good used mode door actuator from a 2002 Avalanche, and there is no way that I can turn the actuator motor thru the output shaft by applying rotational force on the cam piece, it does not turn that way and it will break if I apply any more force. I have had the cover off a couple of these actuators and simple mechanical reasoning tells me there is no way you can turn the worm screw on the drive motor by inverting all that mechanical gear leverage the little motor uses back against it thru those plastic gears thru the output shaft. But since you say it can be done, (without actually demonstrating it on video) I tried it for grins. Mine, which is the same as yours, will not move with any force below the breaking point. It will need to have the case opened and the gears re positioned, or run to a desired position by applying the appropriate voltage to the correct pins.

This video was a great help. Thank you

This worked on 99 Silverado, but the new motor did not wanna separate from cam so I had to install whole unit as one. It can be done, but not fun. Also recommended moving duct underneath actuator. I had to remove ductwork on passenger side first to be able to push it it about an inch out of the way

This is by far the most frustrating thing I’ve ever attempted. I’ve got motor and cam off. Now I can’t get the cam to line up with with cam gear and go back on.

There is a small worm gear on the drive motor and other gears that give a large reduction at final drive output. If you try to force movement you WILL BREAK TEETH on the small pinion gear. Instead of trying to move by hand, it's important to have the unit (and control knob or dial) in the middle or central position at install. Additionally, if you managed to move the unit manually, you run the risk of getting the controller out of sync and possiblity out of electronic control range.

I’m unable to get to the top screw in my truck. What tool did you use to be able to get in there?

I disconnected my battery and unplugged the actuator for a few minutes and plugged it back up and it worked again. Glad I tried that before pulling the actuator off

Just spent 4 hours under my dash figuring out best method to reinstall mode door actuator. Hints: 1) Have the actuator on the cam plate then mark externally the position/direction that it fits with a something bright. I used a bright sticker and cut to the size of the shaft that sticks thru the actuator. Now put a sticker on the actuator and the corresponding sticker on the cam so when you seperate them they can line up easy. 2) Now pull the actuator off the cam plate. 3) Place the cam plate up into the mode door area under the dash. Match up gears on the cam to the white gears. After its matched up you'll have to run your fingers behind the cam plate and flip the pin down until it goes into the cam plate channel. Keep trying you'll get it. 3) carefully push on the cam plate and rotate while the air is running to make sure its working out the different vents and that the pin hasn't slipped out of position.*** Important ** if you tested and its working leave the air running( The air causes the cam plate to get sucked in and you can easily rotate to the position that is best suited to attach the actuator. You should be able to attach fairly easy since you marked the position of the shaft with the stickers. Make sure while your sliding it on you have it lined up with the screws that are going to hold it in place. 4) Screw in the 2 screws 5) Before plugging in find a video on calibrating actuators for GM.. Good luck.

Well explained. Thanks!

Thanks for the video this helps me see it better since I am not laying upside down :) I broke a gear inside the new actuator trying to clock the new actuator (yes carefully) Luckily the old actuator gear was OK and I was able to swap it, but its so easy to open,if you need to reposition it, it might be safer to open it, remove idler gear, then reposition.

Finally someone speaking English

How did y’all get the top bolt out I can’t fit anything in there

Cant you just leave the cam in the car and loosen the motor and pry it off carefully. I see where you mentioned a punch or philip screw driver so I have to image if you can get a small flat head or pri bar in there you could just pop it out and put another without taking it all apart.

Being in the place it is, this is quite difficult. I was able to get the old one off but have no idea how the install will go. Your tip about installing the cam alone sounds like a great idea. I am going to try it that way and see how it goes. Thanks for the very informative video!

thank u for the info i was looking for a video on the mode actuator but kept finding only videos with blend door actuator lol

I would take a picture of the old installation

how did u order the part ?i ordered it but got wrong one and guys in the parts department domt seem tp know

visual of this being installed would be of way more benefit tthan all your explanation

So I get moving the cam to the defrost position....Should the control dial also be on the defroster position? Common sense tells me yes but would like a "YES" on it. Great video by the way thank you!

-- Hey thumbs up. Can you leave the cam in there and replace the motor?

yes i thought my activator was bad so i took it out... its actually the linkage is broken inside i think..no videos on how to fix...anyway after removing activator white gear is free to move downward which direct cold air out all cabin vents in my truck...so i have no defroster...no big deal...

Do you have a part number and correct name to the actuator? I own a 2002 Silverado and have the exact problem you are detailing on the video.

I can't get to the top bolt of the actuator to take it off

I replaced the actuator like you said and recaplivrared it cause it didn't work. All it does is when I turn the key to the on position it goes from defrost to face vents back to defrost and does nothing else. So I replaced that actuator to see if that fixed it and it does the same thing. Do you or anyone know what the problem could be? I have the auto ac unit

It would be nice if you actually filmed it as you take it off and put back on.

I own a 2001 GMC Sierra, my mode door is stuck on the face vents (no defrost or floor). I'm seriously considering doing this myself, if I'm understanding correctly here, can you just remove the motor only and not the plastic cam portion or does both motor and cam come out together?

You didnt show you installing it I was wonder what tricks u did to install it

Mine is just the opposite the gear triangle moves defrost door air the little lever is floor or dash

We installed a new one. Went to run it and it stayed in the defrost position. Then now it doesn't move at all.

Any tips on getting to that top bolt I can’t seem to get it

Mine does not have those gears on the cam

What is the part number?

Bought a new one doesn't seem to index far enough to cover all modes. Need almost 180 degrees rotation

99 silverado or GMC through 06 there the same method 👍

Same part/problem, 01 suburban 2500

You need to get over that cold, and redo the video!!!

So make sure cam is in defrost pos

When replacing the HVAC what do want to have your heater control on . Floor or defrost. Help

Thank you for the video but please stop sucking on your teeth during the video lol

Amazon sells just the gear for 12 bucks

Can you remove the motor without removing the cam

Anyone did this repair and record it..... ima visual learner I gotta see how you do it

They are not supposed to come apart. I think I ruined a brand new ac delco one trying to get the came wheel off. It was pressed on really good. Trying to knock the cam gear of the entire center of the actuator came off. Do not listen to this guy.

why do you click your tongue so much?

Rr

L

You showed no work whatsoever on removal or replacement of the mode actuator thanks for nothing

stop smacking your lips