2007-2014 GM Rear AC Repair and Service - Expansion Valve
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- Опубліковано 11 чер 2016
- Repair, service and refill 2007, 2008, 2009, 2010, 2011, 202, 2013 and 2014 GM vehicles with rear A/C. This includes the Suburban, Tahoe, Escalade, Yukon, and Denali. This video shows replacement of the rear Expansion Valve, Front orifice tube and tips on diagnosing and troubleshooting the A/C system.
Keep an eye out for a new Video on How to Evacuate and Recharge an A/C system.
- AlanFixedIt
For others that are considering tackling this job, I just finished this on my 08 Tahoe sized escalade. A few pointers: 1) have the refrigerant pumped out, some shops might do it for free, it only cost me $40, but it's just the right thing to do. 2) The tahoe sized black plastic box holding the blower/evaporator/heater core is different than this video and can't be split in half practically on the vehicle and it would be faster to just pull it out anyways. Disconnect the coolant hoses underneath, less than a quart came out, so it wasn't a big deal at all. there are 2 bolts through the floor that hold the box on the vehicle. 3) I had to cut my AC lines at the expansion valve because it was rust welded on. I also had to cut the expansion valve most of the way through to recover the backing plate, I'd order the backing plate in addition to the expansion valve. 4) I used replacement rubber hoses from amazon/ebay that zip tie on to the old hoses, it wasn't too bad to route them through except loosening the running board brackets to get the fittings through. 5) i pulled a vacuum on it before refilling, supposedly that is very important to eliminate moisture in the system that will wreck all this work.
6) It really is quite a bit of work!
Great video. I have a GMC that’s blowing hot air in the rear. I now have lots of check points to refer to because of your video. Thanks. Keep doing a great job
Did you find the culprit?
I recently started having issues with the hvac systems and tended to avoid the problem. I like fixing the issues myself if I can, this will definitely help a lot.
I'm going to do this Fall on my Astro Van. The front works too good and don't want to risk it for now. I knew that valve was there somewhere. I looked straight at it and didn't know what it was. Finally found a video showing this and I've been looking off and on for two years! THANKS!
You did a wonderful job on this video bro. The HD was great. You didn't talk too much. And you got straight to most points. Excellent job my man!
Without a doubt, the BEST AC Tech Video I have ever watched
The best video on this hands down no need to break the coolant system or pull the whole unit out just to replace the evaporator and expansion valve thank you saved me headache and so much time and the fear of breaking them plastic coolant elbows going to the rear heater core much love brother!!!
Attentive to detail, very well presented and informative process. Thank you so much for your time and useful information.
Great info. hard to find walk throughs on newer GM vehicles
Spectacular video. Thank you for taking the time to show with great detail. Extremely helpful
This was excellent. Nice job explaining and showing the problems and methods to repair the system.
Thanks for posting this video. I keep hearing a hissing noise in the very back of my 2010 escalade luxury. Im going to take that panel off, n see what it is now that i know where the rear expansion n actuator are. Im also going to discharge my system to change those filter in the high ports n the one in the back. I charged my system but it does not blow all that cold. Once again thank you for posting the video and for all the information. I got a good head start now on tackling my problem.
Having this Exact problem with my 07 yukon its in the shop and the parts list is growing!
awesome job explaining everything
Thanks for this, saving for later!!!
Alan great job. Thank you for all the info
You sir.... Are the MAN!! Thank You!!
Bro. This was awesome. Keep up the good work.
Great job. My Tahoe is not really cooling in back. I will check and replace these orifice tubes and expansion valve. Thank you.
my blower went out on my yukon for the rear. tanks for showing me where it is.
You're welcome. Thanks for the comment!
wow i'm more than impressed...great job sir
Nice job explaining, filming and editing !!!
@AlanFixedIt If this is how good you were in 2016, I can only IMAGINE how good you are now. SUPER gifted bro. Thanks for sharing, I learned alot here should I ever run into any issues w/ he A/C on my lil 2012 Tahoe :) Subscribing
Nice video! Thanks for sharing.
There is also a filter inline for the rear in the smaller line running to the back under the hood. If you had the compressor fail or discharged replace it then too. $3.99 at local parts house
Excellent video, thanks
Excellent video, thanks!
Awesome young man!!!!!
thats a nice job on that copper splicing job.
Great video. For future reference the word "Freon" was a Dupont trademarked brand name for the former refridgerant R-12. Which is no longer in use. The newer R-134a has no special name, it's just called refridgerant.
For an amateur presentation this one is surprisingly good, even better than some 'professional' jobs. Not only that, you've got skills with the camera and microphone, I'll sub. The physics behind how this system works is amazing. Was there a reason you chose not to replace the accumulator? This one is a good reminder to never use stop leak, the previous owner was a goof.
What a great video! Would you happen to have a link of the two different types of compression fittings you used? I'd like to research them a little bit.
NICE job! Thanks!
Also on my 2002 tahoe, where you take off the two lines in the rear under neath the vehicle, if I turn on the ac, air actually comes out from there...
i know now because of your video how to change the expansion valve.....thanks so much and i would pay you to do mine if you were in central illinois
Good job sir is very good video ...
Well done Sir.
Great video sir
For some reason, my 2013 have the actuators on the opposite side of the assembly. Im hoping they are the same as everyone elses, because i cant find any reason as to why mine is different than everything else i see.
Your smart! We’ll explain video but need to have the right tools for the kind of job!
Great video
nice work
Does the air blower or expansion valve control only the rear air vents?
Great video! My GMC acadia 2014 has no cold air but is blowing nice and hard, went to the dealership and they said the evaporator has a leak and needed to replace "the evaporator and the fan blower that connected to the evaporator, total cost $1700. Please help.
Good job! I have Cadillac Limo, 10 pack, and front AC works, rear does not?? It has North Star engine on it, year 2004. I wonder if my Limo has 2 compressors/ 2 systems, or is it like yours, only one compressor?? How much it took to fill your Escalade AC system, 6 cans?? Thanks, great video=)
Good job! The only thing you missed was to clean out the rear air flow area and clean the evaporator while you had it out.
Yes, and as you said, it's an EVAPORATOR coil, not a condenser, which is in front of the radiator. I have watched several videos lately where the person calls an evaporator a condensor by mistake. He does that more than once in this one.
nice job
On my 13 GMC Acadia the rear ac controller sometimes is blowing air sometimes I don't blow at all what is the issue ,any ideas
Hi my friend. Is the valve expansion and filter Inside it.
back the same as the front?
Will this be the same on a 2002 tahoe?
You should add 3 oz of pag oil in the evaporator lines or in the evaporator it self before replacing your expansion valve
Great vid!!! I would like your thoughts on my AC issue. I have an 07 GMC Acadia and when running the AC for an hour or more on humid days, the air stops blowing out the front vents but I can still hear the blower going. At the same time, hot air comes out the back AC. If I turn off the AC button and leave the blower on, air will start coming out the front air vents after 10-15 minutes. Turn the AC button back on and the front vents and back blow cool air for about 15 minutes then the issue starts over again. Had a garage re-charge system but it wasn't really low and he added dye and could find no leaks.
Check if the lines to and from the evaporator show any sign of ice after the ac has been running for some time.
Good video. Maybe put a link up of what materials you used and where to get them. What compression fittings are these called that you used on the splice and what are the sizes?
thanks for shere
How did you remove those parts? Minute 9:30 I did try following this video but it’s those come off’ do you need a special tools to separate those parts?
Could this be all done just from the bottom ?
Escalade is blowing Hot air readings of gauges are 125 High and 55-60 Low when compressor comes on, note compressor is coming on about every 30 seconds what do you think problem could be, could tube be clogged ?
I have no leaks in the rear but it’s not as cold. I think the two rear orfice tubes are my problem.
I removed the 1mm bolt but the line is stuck together still I tried pulling as hard as I could
I have a question, how did you know that expansion valve was the problem?? Thank you very much
Can I change the expansion valve without opening the hvac unit inside the truck !?
I mean only from outside!
Recently, I’ve changed compressor, condenser, accumulator, rear evaporator, orfice tube and rear door actuator, yet the rear ac sometimes blowing hot and sometimes blowing cold. Specially when I drive it blows cold air!!! . In idle it blow hot air.
I assume its expansion valve.
Can I change it without
Removing the unit it self,
Only from underneath
The truck !!
I need help on that please
Thanks to all of you guys 🙏
My 2007 Tahoe does not have torx bolts
How do I know if my rear expansion valve is bad ?
my rear a.c on my 2007 chevy tahoe only blows cold air on the bottom vents of the 3rd row seat but no in the roof. what fo you think it could be?
j m , that sounds like an issue with the actuator. There are 2 actuators that can be seen in this video. The hot/cold actuator that I show (4:21)in detail, and a little further forward is the selector actuator. It's closer to the rear passenger door on the same assembly. This actuator moves to select what vents the air is channeled to.
I am wondering, do have to remove the evaporator to remove and install the expansion Valve, if not then it saves time just remove from underneath. Saves time not to remove the panels, etc.
I was thinking the same 🤔
I've yet to attempt fixing my issue in my 2010 escalade. Yet from watching this video I would take the panel off just to see what all problems I got going on, which I am going to do. Saving time by just changing the expansion valve from underneath would save time if that is your only problem you got going on. If not I would just take the panel off to b sure you don't have to do it after just changing the expansion valve only to find out you still have a ac issue.
I have a 2015 Chevy Tahoe that just had a leaking condenser changed and the front is great but the back is hot. The dealer changed the rear evaporator but it’s still not blowing cold. I noticed the lines running front to back under the Tahoe are not cold and no drip from the rear condensation drain at all. Any help would be appreciated!
Chances are there is an orifice tube or filter somewhere in the lines where they split to go to the back
You need to pull a vacuum to reduce the boiling point temperature of water so any moisture boils off into steam. You need to look at a conversion chart and make sure your pump will go down far enough at the ambient temp to achieve this. Yes just pulling a vacuum is way better than nothing...but technically if it was open for a long time it needs a proper vacuum for extended period to get all the moisture. That harbor freight pump (if its the single stage) will only go to 27 in HG. That is like 110 degrees to boil off moisture.
hi, i plan to change my 2010 suburban, do i need 2 expansion valve or it has only 1 expansion valve?
could u give us the part number for the things u used?
Comarade Lee did you ever find out? This guy doesn’t answer anything
I have a 2007 suburban with rear AC problems. The actuators are fine, but the air in the rear is just not cold enough. If there is a leak in the rear system, would the front AC system still work fine? If so, I guess it would be best to check for leaks before replacing alot of parts.
Peter Lindfors no the systems are connected and filled with the same refrigerant. A leak wouldn’t make sense. Likely your expansion valve
@@AlanFixedIt Thanks for you quick reply. Do you think its possible at all to replace the valve just from underneith, without removing anything from inside the truck?
I needed to replace the rear a/c expansion valve on my 2007 Tahoe LTZ but I can’t get the case to split on the bottom. I’ve removed every clip and screw but the case will not split to expose the rear heater core and the evaporator. Are there any clips inside the case?
fks1964 do you have two expansion valves or just one. Is there also one in your dash
Drop Zone Media i actually found the problem. A leak in the line above the right rear wheel. No room to splice it. Not going to pay $400 for the lines so I blocked the rear AC. Thank you for your interest.
@12:11 there's a small black rubber thing sticking down through the floor. On mine it's dry rotted and falling apart. Done sir is coming out of it. Can you tell me what it is and what it's used for? Thank you!!
Did you ever find what this part is and it’s purpose? I noticed mine had water dripping from it today, when I discovered I have no AC at all in my Yukon.
@@TandyKibbler no I didn't. My best guess is that it is just a drain for the condenser?!
What size were the compression fittings ? I have 2007 yukon and a hole in my line
I don't remember, but I just took a piece of line down to the store
How long would you say this took? I have to do it on my 08 Tahoe.
Doing it now. Need the size of torque screw
Lol about 2 hra
on my 2007 chevy tahoe the rear ac keeps blowing hot air??? on cold
In this video I'll show you a few key spots to check. I'd guess it's either the expansion valve or the door actuator
did you use a flaring tool for those fittings underneath were you had the leak.
dogwood two No. the type of fittings I used didn’t require it.
@@AlanFixedIt what size tubing did u use for the repair sleeve. Did u solder it in?
If the pin hole was found first then replacement of the evaporator core wasn’t necessary?
In this case yes, however it could have still been an issue on this or other vehicles, so I left it in.
At 6:53 I'm pretty sure that's an Evaporator coil and not a condenser unit. But hey I could be wrong, you may have a heat pump unit what do I know?
Yes I agree about getting the terminology right. There’s a big difference between an evaporator and a condenser
I did remove the 13mm nut from the bottom but the high and low pressure lines do not come off from the extension valve. What should I do to access the two bolts that hold the expansion valve?
I had the same issue I think it was glued
I am having the same problem as you both, it is like it is glued together and I can't break it apart. I wonder if it is that stop leak crap and if there is a solvent to break it down? If anyone knows of anything I would love to hear about it!
Thank you for making this video!
I have an 09 Denali and the rear AC is stuck on warm air.
The lines near the exhaust are ice cold however.
What’s the part number for the actuator? I believe it’s what causing the error to block cool air from flowing.
Saud not sure on the part number, but the rear actuator sounds like your issue
AlanFixedIt thank you for your response!
Hey I’m wondering if the replacing of the actuator blend door did the job? I’m having the same issue, was only getting hot air and the lines are ice cold. I replaced the actuator and when I turn it from hot to cold it’ll move half way and then return.?? Same thing with the actuator door that tells it where to blow the air from(floor)(ceiling vents). @Alanfixedit
Alanfixedit, would you know why it’s doing this ?
miguelgarcia545 I replaced the actuator and it did the job. It would go all the way from cold to hot within seconds just like expected to. Not sure why would yours won’t work.
Im not geting any air out off the rear vents...front ac works great! What do you recommend?
ambrocio benitez no air at all? Could be the rear fan itself or a fuse that runs he rear fans.
@@AlanFixedIt when i turn it on i can hear the fan start .but theres just no air comeing out of any of the ports
ambrocio benitez I got the same problem
@@wolfkixs9022 if i get to it firs ill let you know what the problem was...
@@69ambrocio every figure out the problem
can you have it evacuated by a professional then do your own work and recharge it on your own? I hear its around 100 bucks to have it evacuated, it would cost me that much to by the gauges and pump.
Nick Lucas good question. In short: yes but it will not be nearly as cold and could have issues with icing up. Because once you open the system and let air and humidity into it, it’s contaminated. It’s important to vacuum the system after it’s all back together to remove the humidity and atmosphere from the system, as well as check for leaks. It’s worth it in the end to do it right.
So really it's more important to have it professionally filled, and hopefully some punk kids accidentally crack a line and let your Freon out one night when you're not home?
Yes, this and my other video show how to vacuum the system and refill at home after the system has been opened up, repaired and resealed.
You could rent a vac pump pretty cheap. But yeah once you pull them gauges off of the valves, air does and will get sucked into the system and will not be under a great vacuum.
Don't mean to rip on GM cars since i have one myself, but the A/C is just awful on these cars. Every year it needs a a few $100 if you're handy just to get cold a/c. Meanwhile my mom's honda is just zipping along.
Looking at a ridgeline just to avoid all the little seals, lines corroding apart, a/c compressors, rear a/c seals, and all the rest that have failed on my GM.
My van has a/c cut off to the rear after all the issues for its last remaining season.
Can I bring you my car to you please. I need help
13.44 minutes: that's the rear evaporator, NOT a condenser.
مافيه احد يترجم
"Next time"! Lay the evaporator on a piece of cardboard, so you don`t poke holes in the evaporator.
7 cans of freon that's alot
Good video but its called refrigerant not freon. Read the can. People need to stop referring it as freon.
Useless