pretty bad
Typical Repair Cost:
Average Mileage:
54,383 miles
Total Complaints:
20 complaints

Most common solutions:

  1. not sure (7 reports)
  2. replace condenser (6 reports)
  3. replace compressor (4 reports)
  4. replace hose assembly (2 reports)
  5. line was replaced (1 reports)
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This problem may be covered under warranty. Ask your GMC dealer.

problem #20

May 082017

Sierra 1500 Denali 6.2V8

  • Automatic transmission
  • 61,000 miles

Lost AC 100% over a month ago. GM parts on "intergalactic back order" per dealer....GM telling them no condensers in site...all going to assembly line. Totally BS.

- , Atkinson, NH, US

problem #19

Jun 022017

Sierra 1500 SLT 5.3L V8

  • Automatic transmission
  • 72,289 miles

This is the second issue with the AC system, The first was the discharge hose. System yet again was not cooling, took it to the dealer and was told that the shaft inside the compressor had broken and had to be replaced. Again, GM appears to be aware of the problematic compressors but, again as with the discharge hose, no action to recall has taken place.

- , Tullahoma, US

problem #18

May 012016

Sierra 1500 Sierra 15500 Denali 6.2L

  • Automatic transmission
  • 95,000 miles

I have been waiting to get my air conditioner fixed now for months and I keep getting told there are no Condensers available. I have talked with service writers at GM dealership's well as other Sierra owners and they all have the same problem for the most part.

This needs to be put on a recall list or I have decided to file a class action lawsuit in this matter regarding all Sierra owners across the country.

I, as well as I am sure other people, have serious breathing issues in hot weather and need my truck fixed promptly.

Ford properly should not treat the owner of their vehicles this way.

- , Michigan City, In., US

problem #17

Apr 262017

Sierra 1500 V8

  • Automatic transmission
  • 61,000 miles

I have been a GMC loyal owner for many years. We purchased the extended warranty. The problem is the ac quit working and only blows hot air. I live in Orlando FL where it is 95+ degrees daily plus humidity. My ac has not been working for at lest 3 weeks! I took it to the shop and they kept it for a couple of days and had me pick it up saying the part had to be ordered. That problem I am told is that many other GMC owners are having issue and the part is back ordered. It actually has to be made and they can give me no idea when the part will be available. Meanwhile I am told that there are some 2000+ other owners waiting as well. This is not acceptable!

Meanwhile payments are still being made for a vehicle that I paid $43,000 for because I work hard everyday and at the very least deserve to drive to work in comfort paying that amount of money. I live in an area where the traffic is awful and drive in bumper to bumper on I4. That is maddening with an a/c. So windows are down and I get to inhale the exhaust from all the other vehicles on the road.

Meanwhile the only calls I get from GMC is to purchase a new vehicle from them. The only incentive they offer is a $1000.00 off loyalty certificate. Really? Who in their right mind would buy another vehicle from them when they have no solution and no concern. I want to find a way to let unsuspecting new buyers know how much GMC cares when you have a problem and that is not at all! I called the dealership again today because I have heard nothing form them in a week and a half. The same exact response was given to me again. The part is ordered. It has not been made and there is no time line when you might get your ac working again. Thank GMC

- , Sorrento, US

problem #16

Jul 302016

Sierra 1500 SLT V8

  • Automatic transmission
  • 78,118 miles

2 years, 4 months of nothing but highway driving... and $800 a/c issue' - unbelievable! I guess the a/c issue is better than the $6000 cracked head problem I had to pay for on my 2001 Sierra... that GM was VERY aware of and didn't cover. When will I learn???

- , Kyle, TX, USA

problem #15

May 152017

Sierra 1500 All Terrain 5.3L

  • Automatic transmission
  • 58,000 miles

Three years old and a/c out? Wtf? I've got 2002 Toyota with 185,000 and factory a/c works fine. I've never had that go out on any vehicle I've owned and this early. This truck has never been off road or damaged in any way. Sad, guess I'm going back to Toyota.

- , Granville, US

problem #14

Apr 282017

Sierra 1500 LX 5.3L

  • Automatic transmission
  • 71,000 miles

Faulty weld on ac condenser. Same as many others. Seems to me it is a factory defect. Don't know why there isn't a recall.

- , Cleburne, TX, US

problem #13

Mar 012017

Sierra 1500 LS 5.3L V8

  • Automatic transmission
  • 51,000 miles

Been a GMC Family for 30 years.........Why is there no recall on the CONDENSER that is obviously a manufacturing defect. Many complaints online for the same exact pin hole leak on the upper right hand corner. It's HOT as h*** out here......be American GMC and take care of your loyal customers.

- , Marietta, GA, US

problem #12

Nov 082016

Sierra 1500 4.3L

  • Automatic transmission
  • 90,000 miles

Hot air comes out of drivers vent when it is set to cold.

- , Palmetto, FL, USA

problem #11

Sep 292016

Sierra 1500 LX 5.3L

  • Automatic transmission
  • 36,500 miles

I have been a GMC Customer since 1976 and have purchased a total of six new trucks over the years. My son is a GMC Customer as well. I am a retired Crane Operator and recently Retired on my Local 3 Pension and worked my ass of for 37 years often working 12 hour days without a day off for months at a time. SO when I laid down over 50K I expected it to be something I could feel good about driving & never expected it to be a death trap that would be best used as a boat anchor for the cargo ships carrying imported vehicles. This Model Year is unsafe and should not have been made available until it had been properly tested and GMC should be more focused on the safety of the Customer & the other innocent drivers and pedestrians that fall victim to the defective safety equipment. At just over 36k miles 36500 my A/C suddenly started blowing hot air. I had just had it serviced by the dealership and not sure what caused the problem. In my research online there have been numerous complaints of other incidents at around the same mileage. There is an issue with the design of this model which causes the A/C compressor to run automatically when started even in the dead of winter. This causes it to fail from excessive wear on the unit and the repair costs are est. $1800-$3000. This is something that GMC should be covering. In the time I have owned the truck there has been a major safety equipment system not working properly. I called GMC and began the formal complaint process and was pretty much blown off and haven't heard anything back from them. With the amount of money I paid for this truck I should be safe and comfortable and have something of value. I feel like I have been taken for my money and want what I paid for. At this time I have made sure that my family, friends and colleagues from local 3 as well as my neighbors and my social media contacts don't make the mistake of buying a GMC & it may not seem like a big deal but word of mouth is the number one advertisement in business & without the customer there is no business, If GMC replaced my truck with a new one, the trade in value is about $34900 and it would leave a difference of approx. $27000. I fully intend to pursue the matter & have filed with the BBB Auto Line for resolution. It will more than likely be in my favor because I am a California resident and the Lemon Laws here are in the favor of the consumer but it will cost GMC in legal expenses and resources to participate in the process which can take up to 45days. Word of mouth has already cost several people I know to purchase from other Manufacturers and I am diligent in telling everyone I know about all the defects & headaches this has caused me. It has wasted my time and money for them to treat me as a crash test dummy on my dime. DO NOT MAKE THE MISTAKE OF PURCHASING FROM GMC they DO NOT STAND BEHIND THEIR PRODUCT & HAVE NO REGARD FOR THE SAFETY OF THEIR LOYAL CUSTOMERS.

- , Mokelumne Hill, CA, USA

problem #10

Sep 152015

Sierra 1500

  • Automatic transmission
  • 9,500 miles

Dealer mentioned that this is a common problem, I am yet to see anything from manufacturer.

- , Jacksonville, FL, USA

problem #9

Dec 122016

Sierra 1500 SLT 5.3L

  • Automatic transmission
  • 79,000 miles

AC stopped working on my gmc sierra within 2 1/2 years of buying new. $51,000 and two years later you tell me I need to put another $1000 into it b/c of a crap ac system. Tried calling GM since this is a well know problem got nothing from them or the dealer I got it from. Has given me a bad taste after bailing GM out of the hole. This truck has also had 7 recalls. Just plain out sorry GM. Wife also has a GMC will be trading both in on Ford's.....

- , Bamberg, SC, USA

problem #8

Oct 272016

Sierra 1500 SLE 5.3L V8

  • Automatic transmission
  • 42,000 miles

LIVE CHAT Connected to Agent Robert Tuma:10:19:09 AM GMC - Service on a vehicle I own Connection established. Welcome to GMC Connecting.....A live chat agent is now entering the chat.

Scott:10:20:23 AM Thank you for contacting GMC Customer Assistance, Robert my name is Scott. Your Safety is very important to us at GMC, so please remember to not use any hand held device whenever you're driving.How can I assist you today? Robert Tuma:10:23:51 AM I have a 2014 GMC Sierra truck. I have 42,000 miles and am no longer under warranty. Last week my AC stopped working, I called the dealership where I have always had all maintenance done and asked when I could bring it in... I was told that I would have to wait until Nov. 7th... I live in Texas; even in October AC is a must... So I decided to try and figure it out myself with Google... I got online and found out that since 2014 there has been an 8 dollar bracket that could have prevented this, yet was never installed on my truck even after have only dealing with the dealer. Robert Tuma:10:24:48 AM I couldn't wait, so I bought the parts myself and had an local mechanic test and verify the fix... Robert Tuma:10:25:58 AM $231.11 cost for repair, $64.09 cost for GM Original Equipment Air Conditioning Hose Assembly, $8.66 GM Bracket Part#23264893 Robert Tuma:10:26:47 AM The $8.66 bracket could have prevented this issue from the very beginning... #PIT5331 Scott:10:27:05 AM I apologize that your AC stopped working,Robert. Robert Tuma:10:29:29 AM I believe that I should be reimbursed for my cost; it seems that fixing known issues should be a benefit of using the dealer for maintenance. Scott:10:30:39 AM To clarify did you have the repair done at a GM Certified Dealership, a Certified technician or a independent mechanic? Robert Tuma:10:32:54 AM I can call and ask if they're certified, the GM Dealership had a waiting period that was to long for 90+ degree weather... I took the truck to a place called Lorentz Motors in Lewisville, TX. They fixed the issue in just a few hours. Robert Tuma:10:35:22 AM My dealer in Carrollton, Classic Buick GMC of Carrollton has had ample opportunity to add the bracket, as all other maintenance has always been performed there. Scott:10:36:12 AM Lorentz Motors did all the repairs? Robert Tuma:10:36:41 AM http://www.lorentzautoinc.com/ Robert Tuma:10:36:50 AM Yes, they did all repairs Robert Tuma:10:39:45 AM They're ASE Scott:10:41:52 AM Since the repairs where done at a third party shop and not done at a GM Certified Dealership, there will be not reimbursement from GM. Robert Tuma:10:45:22 AM Okay, I'm sharing this conversation in every forum I can... The fact that there has been ample opportunity for GM to fix an issue they knew about, but ignored, is something people should know about. This will also weigh heavily on future vehicle purchases.

- , Lewisville, TX, USA

problem #7

Aug 202016

Sierra 1500 SLE 5.3L

  • Automatic transmission
  • 39,000 miles

I have seen and read many complaints about 2014 GMC Sierra and Chevy Silverado Air Conditioning stop working even at early as few thousand miles. This is a widespread problem for this vehicle and GM needs to get its act together and fix this once and for all. We bailed GM and do not deserve this. Thanks.

- , N Hampton, NH, USA

problem #6

Aug 162016

Sierra 1500 All Terrain 5.3L V8

  • Automatic transmission
  • 46,000 miles


- , Orange Park, FL, US

problem #5

May 022016

Sierra 1500 SLE 5.3L

  • Automatic transmission
  • 81,000 miles

This truck is not even 2 years old and already has the A/C lower hose assembly defective. Really! Dealership wants 500 to fix. GM should fix it free of charge. And who drives only 12000 mile a year for the 3 year 36000 mile warranty. It must be just a though of your covered, and a sales perk. GM you took the bail out cause you needed help. The public should stand up to you for producing crap and charging a premium. Bail us out.

- , Somerville, TN, USA

problem #4

Nov 012015

Sierra 1500 4.3L

  • Automatic transmission
  • 12,000 miles

When you come home at night or turn off the fan/blower completely and your system goes to "sleep" as they call it. When you start your vehicle up in cold weather and turn the fan on the A/C comes on and initiates the compressor running in extremely cold climates. Therefore your compressor is being slowly destroyed so as you will be replacing it and other components when the finally decide to give out.

General Motors will tell you the vehicle is performing as designed. So I must assume that it has been designed to be an issue later down the road after warranty so you can spend more money to repair/replace the unit. Talk about taking it to the consumer!

- , Cincinnati, OH, USA

problem #3

May 082015

Sierra 1500 SLE 5.3L V8

  • Automatic transmission
  • 31,000 miles

Truck less than 2 years old and already had to replace the AC.

- , Knifley, KY, USA

problem #2

Jul 172015

Sierra 1500 5.3L V8

  • Automatic transmission
  • 49,248 miles

Less than 2 year old vehicle and a/c compressor goes out and they want $1000 to fix.

- , Bedford, IN, USA

problem #1

May 082015

Sierra 1500 SLE V8

  • Automatic transmission
  • 25,000 miles

In Florida 95 degrees and air condition not working. REALLY? This truck is garbage. Nothing but problems since 3rd day.

Update from May 13, 2015: Said it was from an electrical issue. They put in new battery and checked system,

- , Spring Hill, FL, US