2003 Tahoe No Rear Heat Fix, Suburban, Yukon XL Repair!

[@roseliareuben4385]

*Easy to assemble **Fastly.Cool*

[@ndsubisonfan]

I have the same issue in my Yukon but I'm wondering how you diagnosed it?

[@coloradogirl838]

Thanks sooo much! Your video was awesome! I'm a single mother who doesn't have extra money and your video showed me exactly how to replace the control module, down to needing a 9/32 socket. I bought the part on ebay for $64 and it took me 20 minutes from start to finish. Thanks again!

[@precisionmachineshed]

+Colorado Girl Glad to hear it worked out for you! Thanks for letting me know!

[@moonmoon4338]

Colorado Giró

[@lboggan417]

Colorado Girl, you rock!

[@frankachampong7443]

What is the search name for the part on eBay?

[@eddiewaters5445]

It could also be a bad blend door actuator that will cause no heat in the rear as well

[@JT_70]

Just made this repair, which I was dreading. It was much easier than I expected and worked perfectly afterwards.

[@destinhook3826]

Bought the module and both actuators for $40 at my local junk yard.

[@chefboy1016]

Thanks you was a big help now I'm officially a KZbin mechanic 😂

[@XOBrian1]

Good video, it's the same process in my 03 Yukon.

[@taybreesmith1917]

I can’t seem to find this part anywhere, does that mean it is no longer in production? Is there any chance you can post a link in reply to the correct part??

[@precisionmachineshed]

I can't find it ether. You may need to do some searching.

[@ambassadorofchrist9314]

What is that part called that you replaced

[@brucethorntonsr9545]

Ordered my part from Amazon on Saturday, received it this morning. Just finished it took about twenty minutes works great. Now my granddaughter won't be cold this winter. Of course today it was 72 degrees. I have a 2004 Tahoe thanks.

[@precisionmachineshed]

Sounds good, glad it worked. At least now you're ready for when it does get cold!

[@markhines6531]

Anybody know what the parts name is and what the part number is at amazon. I can’t find it anywhere. Amazon, EBay or net

[@ChrisBrown-yh8ju]

What is the name of this part,also was the heat just not working at all in the rear?

[@jacobpeterson599]

I have a 99 gmc suburban where would the module be in those I cant seem to find anything about my year for the rear heat/ac

[@scottoakley1135]

Spitfire, thank you for a complete and easy to follow video. It really gave me confidence to jump in and make this repair. I had my laptop out in the garage and would stop and refer to the video...and the problem is fixed. Again, great job and thank you!

[@precisionmachineshed]

No problem, thanks for watching. I have done that with my computer before too!

[@tkskmd]

thanks, great video and tutorial. Unfortunately I changed out the module but got nothing. I have zero rear heat or a/c or even air blowing at all...it's as if it has no power at all. Yes, I have checked the aux/auto things. The front hvac works great. Any ideas what to check back there? checked the fuses, they seem fine. Oh, this is for an '05 Cadillac Escalade thanks!!

[@alexolivasolis]

Have you fixed your problem because i have the same problem.

[@thomasguarino4502]

i would say check your blower. if you have no air blowing at all then the blower would be the prolem 9/10 times

[@chrisschulte6461]

Check your rear blower motor resistor/controller. If that goes you will have no heat or a.c. at ANY speeds.

[@DunnMotors]

Thanks 👍

[@2Jeezuzisreal]

05 yukon. Gm suks electrical issues everywhere. All my heater controls have had problems including the heater digital control box i replaced with a junkyard box and it performs exactly the same way, Only heats the vehicle if I set it at 90°. Now my rear heat does not work for the second year in a row in the middle of the bitter cold winter and I decided to chop a hole in the area where you showed the actuator is located and I'm going to turn the flap door to the heat position and put a screw to hold it. Forever. My AC doesn't work anyway.

[@2Jeezuzisreal]

I searched Google and eBay. Can't find a video on 05 Yukon/ suburban. Rear heater.

[@2Jeezuzisreal]

I just learned GM used 2 different types on newer trucks. Delco and Behr The Behr brand has hidden actuators in back. Gm suks.

[@darriusking821]

Hey guys I have hot heat in the rear at all times. I switch it to cool and it changes up front but still blows hot in the rear. I've tried changing the settings up front and in the rear. Could changing the module in the rear correct this issue? I welcome any ideas.

[@bam6972]

same here. did you ever fix it?

[@darriusking821]

No it just started working again on its own.

[@jonathancastro7077]

How do you fix your cold ac.i have only heat coming out and my rear controls where the rear passengers can control went out just went dead

[@boejebie3863]

Can I trouble you with a question? I originaly had no rear heat in my 03 Tahoe, I replaced the control module as you suggested and WA LA! We had heat, so I thought I would check the rear AC and it blows warm air, the front AC blows cold. Should I be looking at the rear heater/AC blend door actuator or could it be something else? Thank you.

[@precisionmachineshed]

+Boe Jebie You could. I'm not 100% sure what the issue would be but there are a lot of comments below talking about similar issues. I can't recall if anyone posted a fix. Thanks!

[@Joelo_629]

I have the same problem but I own a 2003 GMC Yukon. Would this be the same part number as yours?

[@scottytomcat4267]

thanks this is a great video I appreciate your help we gotta learn to help one another thank you so much for the help

[@precisionmachineshed]

+Scotty tomcat No problem, I appreciate the comments and thanks for watching.

[@KentheRolfer]

And why do you nit do the homework to state the real name of "this Guy'. it's not the gmc or chevy name im sure. should be mentioned as much as you say this guy.¯\_(ツ)_/¯

[@boejebie3863]

I just want to say thank you for posting this video, it's a great step by step procedure for replacing the rear aux heating module, it was a breeze, and the best part is that it fixed the problem, I now have rear heat. Thank you again!

[@precisionmachineshed]

+Boe Jebie No problem, glad to hear it worked for you and thanks for letting me know!

[@erickl9578]

What is the part number of the actuator the decides if it blow cold or heat?

[@tomsmk3]

So I have watched two different videos on a tahoe and a yukon on the same issue, bit each guy changed a different part

[@POCarton]

Does this module control the fan or the radiator fluid, or both? I have fan but no heat.

[@rs3328]

Have you had to replace actuator dooes or other in dash fixes for hvac in your Tahoe yet?

[@titubaabutit]

This fixed my problem, Thank you!

[@Dudevegaslv]

My 2001 Yukon my rear a/c or heater none is working !!!

[@theozman38]

My yukon has that. Mine won’t blow at all. Course I’ve not checked the fuse either. Thanks!!

[@KeithsTVHD1]

It could be your Blower motor resistor.

[@truckerc-moe5126]

👍🏾

[@HONDAMeskin123]

I hear a noice in mine in the back of it like a clunking noice when I’m driving is it that? Definitely not drive train or suspension. It’s definitely in the inside in that area

[@davonteammons1684]

I have a 05 Chevy Tahoe and I hear that same noise I wonder is that the problem

[@tammyward5025]

@@davonteammons1684 it sounds like its the blend door that has broke and is rattling around in yours.

[@JeffryMBanda]

How much was the module of dollar-wise?

[@rsalas921]

This is to fix the heater on the headliner right?

[@slowdohc]

Good stuff here. I have a 02 yukon and my friend has a 05 Denali. He asked me about this problem and I had no idea. Hopefully he can get right with this info. Thanks

[@Kencomp1]

Nice job. Exactly what I was looking for. Now I will replace the same module in my 2006 Tahoe.

[@albertomolina511]

Hi what’s the part name !? Or how I can find on amazon?? Thank you!

[@hibiki2401]

Rear HVAC Control Module on ebay

[@rickygray7767]

Thanks so much for the post. I have 2004 chevy tahoe and my issue was the front vents were blowing cold air but the back vents were blowing hot air. The part number you recommended fixed it right up, thanks again...

[@precisionmachineshed]

+RICKY GRAY No problem, glad to hear it worked out for you.

[@TzUuup]

Bro you know thats a lie.. the front has nothing to do with the back. The rear has its own motor and actuators that control that heat and ac

[@melissaschickler7113]

How did you get the black knobs screwed back on when you put put back on??

[@precisionmachineshed]

It's been so long since I did this I cannot remember.

[@KeithsTVHD1]

Gm should be ashamed of themselves for making junk vehicles.

[@eveydelgadillo1505]

Do the 1993 suburban have that behind there too?? I have no cold air blowing from the rear

[@precisionmachineshed]

I am not sure myself.

[@vyncentmariahemphill6789]

My rear AC doesn't blow at all... Would you suggest the same fix?

[@precisionmachineshed]

Could be a fuse, this just fixes the controller that actuates the door going from hot to cold air.

[@gchavira2387]

Sorry what is the part name thanks

[@sagittariusmx3101]

my tahoe2004 is not blowing cold air in rear seats and i was wondering if i changed that will it help fix this problem

[@precisionmachineshed]

You can read through the comments. This repair fixed the control mechanism for the actuator that flips the door from hot to cold.

[@pickle9977]

The rear fuse is the RR HVAC. its actually the 30 amp fuse. At least on my Cadillac escalade. the 10 amp fuse runs the front. I was getting A/C in the back when I wanted Heat. The actuator (next to the module that's replaced in this video) was not switching from AC to heat. I replaced it, the actuator reset by switching back and forth but then now it stays on cold again. Going to replace the module next. Good video, some people might have to replace both to get it working.

[@precisionmachineshed]

That's good info, Thanks for taking the time to post it here!

[@johnsutro2555]

Okay Google power windows

[@jesustinoco7054]

My truck will blow ac & heat out in the front but not in the back is it the same to fix it ?

[@precisionmachineshed]

Should be

[@williamstiggersws]

My rear hoses aren't getting hot from antifreeze to provide heat?

[@coryblack5687]

Bad heater core. If the front blows hot air and the rear lines don’t get hot at all it’s a bad rear heater core. You could try to flush the core but at that point its probably best to flush and replace.

[@dcole808]

Thx man, that was helpful info..heat again

[@precisionmachineshed]

+dcole808 Glad to hear it worked. Thanks for letting me know!

[@chazclemons4317]

So I have kinda the same issue in my 03 tahoe.. rear controls dont work at all. Just blows COOL air.. wont get cold or hot heat.. would you recommend the same process?? Switching the rear module?!

[@desert07576]

What's the purpose of turning on the vehicle for 30 seconds before installing fuse?

[@randyyoung9892]

I had a rear blend door actuator go bad not sure how you diagnosed it?

[@precisionmachineshed]

I think a lot of people start swapping parts and start with the cheapest or most obvious one first and go from there. This module fixed my issue at the time, but that would have probably been my second part to replace.

[@ecgodsmack86]

What if you have rear heat only would this fix that as well?

[@precisionmachineshed]

maybe, going off memory, if it's stuck in the cool air position, it will actuate the door and flip it. Otherwise, i think possibly one of the switches on the dash may cause that too.

[@28chanda]

I have 04 GMC Yukon denali xl the same problem no heat in the rear here's a problem I can't take out the panel I pulled it very hard but it won't pop out can you help me out

[@TheToxicSliver]

Does anyone know if this fix carries over to the 06 trailblazers also? Have the same problem with no rear heat.

[@roltyd22]

My Tahoe is getting no ac in the back,is it the same or could it be the blend door actuator in the back?

[@Wisconsin.pikachu]

Thank you for this, my 05 yukon has this issue started last year, I love the rear heat as a neck warmer and not being able to use rear heat really sucks lol

[@johnathanroden2209]

I replaced that part I didn't know about taking the fuse out. I will do that and see of it starts working

[@javonsedwards]

Does this work on a 05 gmc denali

[@precisionmachineshed]

Should be the same thing

[@mikehaswell9707]

mine doesnt have heat or cold but the blower runs perfect. Is that same part the problem?

[@ronmelliad7327]

Hello everyone, I have some heating/cooling issues with my newly purchased 03 Yukon Denali. In the front, I only get the defrost working. The only thing that I can control is the speed of blower but does not blow cold although I hear ac compressor kicks in and the ac line stays cold. In the rear, nothing happens. The lights on rear control module comes on for a second but shuts off by itself! Any suggestions appreciated.

[@mikelouf21]

thank you mine keeps blowing hot won.t go to cold this might be what wrong with it

[@stonemaster1217]

My back blows cold air but the front ac is hot

[@juniornunez1850]

Will this work for my 01 yukon?

[@ssmanalways3035]

Good video

[@tammyward5025]

I'm a single mom of 4 kids so I've been doing all my repairs by watching You Tube videos. However, my 2005 Tahoe does not have this black box nor the red and gray plugs. I don't have any air flow in the rear, neither hot nor cold. In fact my rear blower will not work (even though I've replaced it) and I've changed out my rear resistor and still nothing. What could my problem be?

[@precisionmachineshed]

I'm no expert, but I'll try and ramble off a few things. Maybe you have tried these already. Fuse, speed switch (these crap out sometimes) could try resetting the computer. I mention how to do it towards the end of the video. It's been a while since I messed with this and the truck is long gone. sorry I couldn't be more help.

[@serpzer]

so whats the actual part name ?

[@precisionmachineshed]

I can't recall exactly, but it is referenced both in description and several times in the comment section. I think it's just a rear heater control module.

[@elisabetng1]

Precision Machine Shed my air will not kick on unless going over 40mph. any idea what problem can be? I have 2003 Chevy Tahoe

[@andre7250]

rear blend door actuator

[@jbrondos]

I think the rear blend door actuator is something different -- to the right of where he was working. It would be nice if the actual part could be listed based on the receipt or something.

[@saddrick28]

can anyone tell me the name of the part other than this guy

[@kevinthomas6924]

How much did that cost the rear heater box

[@scirby1]

Excellent video... I'm having that very problem right now. No rear heat Yukon Denali XL. Also front blower controls not turning the blower on. Possible blower control resistor problem.

[@precisionmachineshed]

Maybe, You might have a bad switch too. My front end has always worked great. My rear heat is still working great two years after this fix also.

[@luisprieto1262]

will this work for a 2004 escalade it would only blow cold air in the back in the front everthing works but in the rear only cold. But I need warm air and it only blows cold. would this work

[@precisionmachineshed]

Should be very similar if not the same.

[@tommymills576]

Definitely about to try this now

[@abdeljalilalhawari2779]

I have Trailblazer 2005 EXT, the rear blower doesn't work or some time work on 3rd speed only but on and off. Any advice please.

[@precisionmachineshed]

+Jalil Alhawari Hello, I am not sure, but it sounds like a bad switch to me. I've had similar problems with an older 1999 Grand Prix I had several years ago, and also a similar problem on my in-laws 95 Honda Accord!

[@TUBEBOOT]

Had to do the" programmy" thing twice but second time's the charm......I now have a HOT HOE...wooo hoooo! Now can you help me with my cruise control which has a mind of it's own...sometimes works sometimes not....and tow/haul never works...thanks for a great video

[@precisionmachineshed]

TUBEBOOT Thanks and glad I was able to help. I have not had any issues with my tow haul or cruise, but I will check around. I know several guys with these trucks and several more that have owned them in the past.

[@charlesperrin5533]

I have a 2002 Chevy Tahoe The blower in rear stop working. I followed your instructions. Instead of replacing it. I tap it and it works. I will replace it soon but as long I don't put the controller on high. Thank you.

[@precisionmachineshed]

Great to hear that worked.

[@ConcettaSpiteri]

I have a 2007 Yukon STL and was wondering if it's the same fix

[@precisionmachineshed]

That's the newer style of course, but the parts are probably similar.

[@Anonymous-it5jw]

Really helpful video. We have an 03 Z71 Tahoe that we bought new in December 2002 - still running, but I know that sooner or later I'll need this video. Thanks for the tips.

[@JjClark-wz7eh]

I'm having the exact opposite problem, no cool air. cold is going back through the pipes, is the part you replaced only for the heat?

[@precisionmachineshed]

I'm not sure, you can read through the comments because there has been a lot of people with similar problems. This fix repairs the controller that moves the hot/cold air flap. It might help.

[@adolfoprieto3849]

this video is awesome, thanks for sharing, I got probably same issue on my 2005 Tahoe but, only hot air on the rear, changing the AC Control Module like showed will fix my problem??... thanks

[@precisionmachineshed]

+Adolfo Prieto Thanks, I'm not sure if would fix it or not, but it kind of makes sense that it would. I know several other people have asked the exact same questions below and I have not heard back from any of them if this works.

[@mjperez402]

Hi , good video but I'm having a different problem with my suburban the rear fan keeps running after it's been turned of completely it end up detaining the battery I'm wondering if you can help thank you.

[@precisionmachineshed]

Sounds like possibly a switch problem.

[@hamelter]

my problem the vent blowing in the back fine but i pour the water in the expansion tank and it comes out from under the running board near the back passenger tire in my suburban 07

[@precisionmachineshed]

Sounds like a possible break in the hose or in a fitting for the lines supplying the rear heater.

[@jeremiahlino5918]

I'm having an issue. I'm trying to replace mines on a 04 Tahoe but the set up is a little different can't figure out which is wich

[@precisionmachineshed]

what are you trying to figure out. I guess your comment was a little vague.

[@danielsimpson8929]

Good demonstration. Only bit I would add. When replacing an electrical component inspect the failed component connections. Just in case of corrosion which you will want to clean if found. Dielectric grease is also a good idea especially for electrical connections on the cars exterior.

[@precisionmachineshed]

I agree.

[@walleyejim8903]

Great video, not sure if you said it, but this only applies to vehicles with automatic climate control. Ordered the module for my 04 Tahoe, only to find out it's not there. Ended up having a bad motor and picked up a reman at O'Reilly's

[@precisionmachineshed]

Good to know. Never thought about the auto climate control myself.

[@nickf8524]

was it making a thumping sound before you replaced it?

[@precisionmachineshed]

No it was not.

[@carlosg9133]

Do you have a link where I can find this part? I'm not having any luck tracking it down an our Minnesota winter is right around the corner.

[@precisionmachineshed]

It's been so long since I did this video, I cannot remember. I think I got mine off amazon.

[@luigigdelucia1333]

Thank You, I just got this vehicle didn't even know there was a heater core back there.i have a question right on top of the tailpipe there's a drain hose is that for the A.C or also for the coolant, because 3 days ago I filled the coolant reservoir and when I started my vehicle my service engine light was on and my RPM gauge worked only when I started moving & it said that I was low on coolant. Can you give me any idea on what it could be even just that slippery water coming out from the back drain. Thank You

[@precisionmachineshed]

Sounds like your back heater core is leaking. I'm no mechanic though.

[@loloent]

Hi thank you for this video, I on the other hand gave a different isue my 2003 suburban after a long weekend trip up to Eustis FL my rear Ac unit stop working for some reason can't figure out why cause my front unit works no problem so maybe u think this could be the problem please wat saids thanku for these videos

[@precisionmachineshed]

+lolo ent No problem, as far as your issues I am not sure. I have not had that issue so I have not had to fix it. I know there were several people that have commented on this video that have asked about that issue. Maybe you could ask one of those people and maybe they figured it out. Sorry I couldn't be of more help to you!

[@MaximoLopez-lx7mh]

Great video thank you so much very helpful

[@precisionmachineshed]

Glad it was helpful!

[@hckyplyr9285]

Thanks for the video. Do you know if the rear zone blower and especially the resistor for it is under that cover you removed? Two speeds on my wife's rear zone don't work anymore.

[@precisionmachineshed]

hckyplyr9285 Hey, I'm not completely sure. If you are getting heat,but only on a couple speeds could be the speed control switch. As for a resistor, I can't help you there. Thanks for watching!

[@johnnylawrence]

Have 03 yukon Denali and I have the opposite issue. No AC in the back. Will this part serve the same purpose?

[@precisionmachineshed]

I am not sure, I have had several people ask the same question in the past couple months. I would be curious to know but it is possible that this could be the problem.

[@dustinbingman382]

johnnylawrence did you figure it out? Mine is the same as you. Another video had the guy replacing theactuator to the right of the module this guy replaced. It controls the door that directs air over heater core and condenser...

[@johnnylawrence]

Dustin Bingman what's up man no I haven't even tackled that project yet, worked on the cabin all summer! When I do and figure it out I will give an update

[@sarahlambert1656]

Can you tell me if this process works for no air at all coming to the rear whether from the front roof control or rear control? Thanks, Kory

[@precisionmachineshed]

To the best of my knowledge, this repair only fixes the part that makes the Hot/Cold air flap open and close. If you are having absolutely no air blowing, I would first look at the fuse that controls the heat, which should be the same one I pull in the video to see if it is burnt out. Being that neither switch isn't working, you are not getting power to them, so I would look at problems before the switch. Fuse would be my choice, after that I'm not sure, the odds of both switches going are kind of slim, but if power goes through one before the other, one switch could be bad. Not sure if that how it works, just a thought.

[@gregoryduvall4758]

Can anyone tell me the name of the part??? None of the parts stores can figure it out

[@mcmobius1]

Rear hvac control module

[@bfriendly100]

I have been trying to find a video to show how to pull the interior trim.....This was perfect!! I am replacing the Woofer on the other side in an '01 THANK YOU!

[@precisionmachineshed]

+bfriendly100 Glad I was able to help. When I made this I was in the same boat as far as there was nothing showing how to tear it all apart. Thanks for watching and commenting!

[@prentice508]

I have a 2005 Chevy Tahoe and have no air or heat in the back all i hear every once in a while a little bubbling sound

[@precisionmachineshed]

Not sure about that. Possibly a fuse, or a bad fan motor? All this fix does is allow a flap to feed from the cold air to the hot air source.

[@71druss]

Thanks for posting,

[@tylerangieslayton7455]

This guy really knows how to get shit popin off! 😂

[@precisionmachineshed]

Do what it takes.

[@Carol-kw8rz]

Is there a way to be sure this is the part needed to fix the problems before buying it?

[@precisionmachineshed]

Basically I based the repair on the symptoms of the truck.

[@canified2352]

What about the rear blower for the ac where is that

[@precisionmachineshed]

Rear blower motor is in the front of that rear housing I believe.

[@canified2352]

Precision Machine Shed thank you. But the ac in front work . but the ones in the back don’t

[@precisionmachineshed]

@@canified2352 I can't recall but I thought the back assembly was on a separate fuse. I could be wrong. Might be a switch problem as well. It's been a while since I messed with these.