A/C blowing warm air, not cold air

[boyzzsandtheirtoys33]

On 3/24/2015 at 2:04 PM, thrasher2010 said:

I had the same problem, took it to the dealer and they said the same thing. Cracked hose and no freon... Parts ordered and repaired.. Worked one day and then back to not blowing cold air.. Took it to a different dealership and they said it was the air compressor/condesnor.. Replaced it and now it works like it should. No problems... Btw my truck had only 2000 miles on it. I only had it for 2.5 months.. Hope you get yours fixed ..

 

 

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How much did the dealership charge you for parts and warranty? I have the same problem on my Silverado. 

[boyzzsandtheirtoys33]

On 3/24/2015 at 9:30 AM, Fishingbear said:

I am having problems with my air conditioning again. My A/C is blowing warm air and this is the second time I have had this problem since buying my 2015 Sierra less than 6 months ago. A few months ago I had the exact same problem and my dealership diagnosed it as a leaking hose and all of the freon was gone. They had to order a new hose and it took a week for it to come in. They installed the new hose and added more freon and it has been fine for the past 3 months until today. This morning I noticed that the air coming out was warmer than normal even though I have the A/C set at 65 degrees. It was fine yesterday. I am going to monitor it and see if it gets worse and if so make an appointment to take it to the dealer again.

 

Just wondering if anyone else has had to replace the hose or had a freon issue with their 2014 or 2015 Sierra / Silverado?

Just curious, how much did the dealership charge you for parts and labor? 

[Tahoe02]

Looks like his was covered under warranty. Buy a condenser online and save some money. Have an AC shop vacuum your system and replace your condenser yourself. Then take it back to the AC shop and have them charge the system with freon. There are pictures on how to do this and maybe a youtube. Just do a Google search.

[Kathy Parker]

My AC quit this week with 39,000 miles.  I was told my warranty had expired.  The GMC dealership wanted $1100 to repair my 2015 GMC Sierra 1500 for issues related to a TSB  PIT5331. There are class action lawsuits in New York, Michigan, Texas, and Arizona.  Yet still, GMC does not feel responsible for the cost of any repairs.  If a company knowingly sells a vehicle without disclosing or repairing the technical issue, does a customer not have any recourse or rights?  I have not been able to find a lawsuit in Florida.  If anyone has any information or suggestions, they would be greatly appreciated.

[AIRRYDE]

Well looks like I have been struck by the A/C problem as well. Took it in and was told its the discharge line from the compressor to condensor that everyone seems to have issues with.

 

My question is, would it better to update it to the new design without the muffler (ACDELCO 15-34718) than using the old design with the muffler (ACDELCO 15-34670) and adding the bracket? I will be replacing it myself, but just want to make sure I get the correct hose for the truck.

[NitroDatsik]

Well looks like I have been struck by the A/C problem as well. Took it in and was told its the discharge line from the compressor to condensor that everyone seems to have issues with.
 
My question is, would it better to update it to the new design without the muffler (ACDELCO 15-34718) than using the old design with the muffler (ACDELCO 15-34670) and adding the bracket? I will be replacing it myself, but just want to make sure I get the correct hose for the truck.

I used the bracket with the new same hose.

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[carnau]

On 8/27/2018 at 2:21 PM, AIRRYDE said:

Well looks like I have been struck by the A/C problem as well. Took it in and was told its the discharge line from the compressor to condensor that everyone seems to have issues with.

 

My question is, would it better to update it to the new design without the muffler (ACDELCO 15-34718) than using the old design with the muffler (ACDELCO 15-34670) and adding the bracket? I will be replacing it myself, but just want to make sure I get the correct hose for the truck.

You sure it isn't the condenser itself? There has been so many issues with them. Here is the video on how to replace it if this is actually the problem.

 

 

[#12FarmersFight]

I just took mine in for the second time as well for the same issue. First time I believe they just recharged it.  The AC never got an more cold than 73. They replaced the hose and added a bracket. It is now at 61. We will see how long this last. 

[Sierra Dan]

Condenser is notorious for failing on '14-'15 Silverado/Sierra.

Also '15 Tahoe, Yukon, Suburban and Escalade.

[TheImpalaMan]

I had the same issue...condenser issue.  After researching all of the "design flaws" that were possible, and adding some dye to the system, I found the culprit on the top drivers side of the condenser.  The fun part was finding a worthy condenser.  I went to a couple of parts houses and opened every condenser they had in-stock for my truck.  I went through 8 of them before finding one that was straight!  7 aftermarket condensers came out of the box warped and one AC Delco Professional condenser that had a bent pipe.  The second AC Delco Professional condenser I got (had to order it) came out of the box perfect.  Now I've been working on cars for 30 years...and I have to say that my truck has the first AC system I've seen without a Dryer can.  The Dryer is actually part of the condenser.  I don't know how many have noticed, but the AC compressors on these trucks aren't large at all.  I replaced the compressor since I already had the system apart.  Replaced it with an "Improved Design" AC Delco Professional compressor.  So, while the entire system was apart, I flushed out the plumbing and evaporator core and ran compressed air through everything until it was all bone dry. The one thing about this system...it is VERY particular about the measurement of the oil/refrigerant.  The new compressor came with 1.4oz (or 1.6oz) of oil, but according to the setup, it requires 2.  So I got a measuring glass and got exactly 2oz oil in the compressor, 2oz oil in the condenser and 2oz oil in the evaporator core.  I sat the condenser sideways for the oil to get down to the dryer (about 20 minutes), reassembled the system and pulled vacuum.  I must say, I really like the design of being able to remove the condenser without having to drop the radiator.  I thought the engineers deserved a "hi-five" for that one, hehehe.  Anyway, after drawing a vacuum and eliminating the humidity in the system, shut down the vacuum and verified that the system held a -28 to -30psi for a good hour.  Installed the right amount of refrigerant and its been blowing ice cold ever since.  I got the AC Delco parts from XL Parts. 

 

-TheImpalaMan

[JoeyRay]

We have spent so much on AC repairs & it works for a few week then back to hot air! Can anyone relate 

[TheImpalaMan]

Is a dealership or local mechanic doing the work JoeyRay?

 

-TheImpalaMan

[BIGDOGx]

Well looks like im like everyone else, was brought in probably 2 or 3 weeks ago and they said they replaced a line going to the condenser even though everything under the hood looks the same, all ac lines didn't look new to me. So i'm sure it's no surprise to anyone here that it is now blowing hot air again. We will see what the dealer says it is this time, they might as well replace the entire system because i have almost 3 years left on my warranty and only have 31k on my truck so they are not getting out of repairing this!

[Frank T]

2017 Silverado 2500 HD,  AC blows ice cold first start up in the morning.  Then after that its barely cool. they vacuumed the system, had to add about 1 lb of Freon and added dye.

drove it for a few days, took it back, couldn't find a leak. they replaced the expansion valve. still the same problem.

[thmj77]

A few months ago I realized my air-conditioning wasn’t working either. Warm air is blowing out from the vents. The warm weather has arrived and I need to find out what the problem is. From what I have been reading it seems to be a very common problem. GM needs to do right and recall the issue.  The truck was purchased new in November 2016. This shouldn’t be happening yet.  
 

2016 Silverado 1500 LT Z71 5.3L 4WD