AC issues wont blow cold air

[01pewterz28]

Ok have a question my 2018 Yukon XL SLT has been having issues with the AC over the past 2 years.

The AC stopped blowing cold air I took it on see list below.

-7/28/22

AC Compressor internal fault.

- AC Compressor kit

- Seal

-Seal

- Refrigerant

-AC compressor


This fix lasted approx. 2 weeks.


-9/6/22 back for the same issue

-Temperature valve Actuator Assemble (22808876)

-Hose

-Seal

-Refrigerant

Removed dash to find high compressor line leaking proceeded to Evac system and replace compressor line charge system.

All was good for a few months.


11/16/22



Evaporator core leaking

-Evaporator core replaced

-Seal

-Seal

-Refrigerant

3/3/23 Vehicle back in for same issue AC stopped blowing cold Air (I am looking for my paperwork to see what was replaced) but they did have my vehicle for

-Dash removed

Removed dash to find high compressor line leaking proceeded to Evac system and replace compressor line charge system.


Told to get vehicle it’s all fixed only to be told mechanic had issues getting dash back in and bent the line again and it had to be replaced took an addition 2 days.
Drove off AC was super cold no issues.

Fast forward to end of April 2024

AC will not blow cold air at idle when driving AC will blow cool air but NOT cold air.

Took the Yukon in refrigerant low, filled it back up put dye in the system they did not see any leaks. I was given the vehicle back to drive and see how it goes vehicle not cooling again (lasted a day) I have a feeling the leak is in the dash it will be going back in 6/10/24 for them to figure it out and see what is going on.

All the previous repairs were covered under my extended warranty between parts, labor, and rental cars total cost for 60+ days was just over $13k (none out of my pocket). The dealership is treating this as a parts warranty for failed parts as they did not last 12 months.

Just trying to get some ideas on what you all think.

 

[Big Mama]

My issue was the condenser. It’s a known issue.

 

[Matthew Jeschke]

Yuck, your shop needs to listen to "DAVE'S auto center" 3 Cs on YouTube! I'm stuck on that guy's videos Seems like a bad case of parts darts to me. Throw parts at it and see what sticks / fixes it. I'd never go to that shop again!

They need to CONFIRM exactly where the leak is coming from before they throw parts at it. The quick fix is to put contrast in the refrigerant and fix one item at a time if multiple failures but not to cheap for you...

I charge mine with cheap refrigerant (a shop won't do this) such as dust off. Then search for the leak. You could even just pump it up with dry & filtered air. Then spray all the lines with dish soap. There's a zillion ways to do it but seems they aren't fully diagnosing the issue.

You're welcome to PM me if you want to do some self diagnosis. AC is actually very simple but they make it seem elusive and charge boatloads to fix it.

 

[Airman68]

If you have rear air, I know those lines are known to leak over time. Common issue. I ended up blocking mine off and just have front air which works fine for me.

 

[blondie70]

How did you go about blocking the lines ?
Thanks

 

[01pewterz28]

Thanks all back at the dealership lets see what they find. I dropped it off a few weeks ago they recharged it and added dye to the system kept it for 2 days could not find a leak (I believe the leak is in the dash area because they removed the dash several times and the one time they put the dash back in damaged the line and w/in 2 weeks I was out of refrigerant. They told me to drive it around see how it goes still the same issue but I had to wait a few weeks to bring it back I was on vacation so it's sitting at the dealership now.

 

[01pewterz28]

My issue was the condenser. It’s a known issue.

This was replaced once they have the Yukon now so lets see what they find.

 

[01pewterz28]

Update the dealership said the rear AC Evaporator core is leaking as well as the Low side compressor hose. I am waiting on a price for these items installed.

 

[01pewterz28]

Seems odd that the AC evap core needs to be replaced will the rear ac affect the front AC from blowing cold air. The rear is working and blowing cold in the 2nd and 3rd row it's just the front. I am getting a feeling the dealership is throwing guesses at this point IMHO.

 

[Toy Tow Denali]

My issue was the condenser. It’s a known issue.

My issue on a 2015 Denali was condenser. Now have a 2021 that won’t blow cold air and is probably the condenser. Bummer is the car only has 36k miles…
If another company had anything like the Yukon, i would dump GM…

 

[Big Mama]

That stinks. Are they going to honor the warranty even though you’re at 36k miles?

 

[01pewterz28]

Someone had asked for an update my AC issue came back, dealership was pretty confident that replacement AC compressor failed again this was fixed back in 7/22, and again 9/22. This time it’s out of pocket I was quoted $7200 parts and labor. The dealership was trying to get GM to cover it under a good faith warranty since the part failed did not last 3 years.

We decided to say screw it and traded it in on a 2021 GMC Yukon XL SLT.

 

[ChiMoose]

I have a 2019 Yukon XL that’s in the shop for the fourth time since Sep’24. Seems like the same progression of repair one thing then the next item is “the issue”. They’re now telling me it’s the entire hose assembly going to the rear. With parts and labor it’s another $2200. Saying it’s a known issue. Any point where we see a recall or reimbursement from GMC?

 

[Geotrash]

I have a 2019 Yukon XL that’s in the shop for the fourth time since Sep’24. Seems like the same progression of repair one thing then the next item is “the issue”. They’re now telling me it’s the entire hose assembly going to the rear. With parts and labor it’s another $2200. Saying it’s a known issue. Any point where we see a recall or reimbursement from GMC?

Unlikely, but it's always worth asking the dealer to ask GM for a 'good faith' repair.

A/C issues are a PITA to deal with and troubleshoot.

 

[Loki223]

If you want to find your own leak, there are only 2 tools you need. A freon sniffer to get to places that are hard to see (evap cores and under dash lines) and a UV pen light and a dark area to use the UV pen light. You can follow the lines and look at everything and find where the problem was. On my 15 it looked like it was the condenser which made sense since that is a common problem. But turned out to be an O-Ring seal for the line connecting to the condensor. Still replaced it since we were there already and i had the part on hand. But that was my issue on my 15. My 05 had more issues, had to basically fully rebuild the AC system.

Amazon.com

https://www.amazon.com/dp/B0DKT158SZ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2

 

[Loki223]

My issue on a 2015 Denali was condenser. Now have a 2021 that won’t blow cold air and is probably the condenser. Bummer is the car only has 36k miles…
If another company had anything like the Yukon, i would dump GM…

Go buy a jeep grand Wagoneer. You'll be wishing you stuck with GM within a couple of months. At the end fo the day, every car has issues, every manufacturer has issues, there are no perfect vehicles. But some are made better then others, and GM is honestly on the top of the list in terms of quality of build in my experience. And i've had my fair share of experience considering i spent my 20s buying cheap POS's and fixing them and reselling them for a profit. Now i just do it that when i want a spare vehicle, that's how i got my 15. After going through the issues she's perfectly fine and now i get to modify her to prove that i won't ever be a millionaire or a drug addict, because i like messing with cars to much