A/C condenser had to be replaced as it leaked all the freon. My mechanic said he's had several of these GMC Sierra and Chevy Silverado around the same age with the same problem.

- Evansville, WI, USA

Ac condenser

- San Antonio, TX, USA

There is a leak on the top right hand side of the A/C condenser resulting in hot air coming out of the vents when the A/C is enabled. After some research I found that this is a common issue and GM has to take responsibility for it. GM already issued a tsb for the 2015 - 2017 Tahoe, Yukon, and escalades with the same engines and equipment as my 2015 GMC Sierra with 45000 mi. Tsb # 17336 air conditioning condenser (combi-cooler) refrigerant leak

- Lemoore, CA, USA

What happened to the Yukon A/C issue happened to me. What would it take to make sure the Sierra has the same recall as the Yukon? "Yukon and Yukon XL vehicles, may have a condition where thermal cycling on the combination transmission fluid/oil and ac condenser cooler creates a crack that may allow refrigerant to escape. This condition consequently may deactivate the ac system which may cause potential customer annoyance."

- Canyon Lake, TX, USA

When at highway speeds of approximately 65+ mph the vehicle begins to vibrate or shake violently as if the rear end of the truck is about to fall out. It is bad enough to make you white knuckle the steering wheel cause you to swerve slightly

- Bakersfield, CA, USA

Torque converter. Me and along with 4 other people are having problems with it. Upon start up and driving it starts to get sluggish and then just comes almost to a complete stop only building RPM's accrodding to the GM dealership it's normal. With all the GMC trucks I've owned it has never done this. And is only starting to do it over the past couple of months. I've talked to a guy who just had 2 replaced in his truck and is continuing to have the problem. To avoid any vehicle damage for anyone else I'm considering if you can check and see if anyone else is having the issue. I take very good care of my truck I don't mud in it or drive it crazy(wreck less). Dealership is also pretty much refusing to look into the problem or diagnosing it considering that it's 'normal' for the truck do that. Which I strongly disagree.

- Headland, AL, USA

I turned on the rear defroster, and my daughter said "mom, it's sizzling." I looked back and there was smoke on the rear window. Then there was a loud bang, and it shattered. The vehicle was not in motion at the time. I was just getting ready to back out of the parking area in my driveway.

- Trenton, ME, USA

When my truck is at or above 70mph there is a constant shaking that occurs

- Portland, OR, USA

A/C condenser is leaking, and has in every GMC that I have seen. Nothing has been done differently. The condenser just started leaking.

- Hazard, KY, USA

Hard brake pedal at low speeds especially while towing or traveling on inclines. Brake pedal becomes hard to decompress without warning and vehicle is unable to be stopped.

- Brunswick, OH, USA

A/C condenser bad. Freon leak.

- Humble, TX, USA

When I'm cruising highway speeds the truck get a violent vibration and makes the vehicle uncomfortable to drive.

- Huntington, IN, USA

I have a 2015 GMC Sierra with 95,198 miles on it. The ac started blowing hot air when I was driving to work. I purchased and installed an ac refill kit, which only lasted a couple of hours. I took my truck to the local GM dealership to diagnose problem. Dealership called to tell me that it would be $800+ to replace ac condenser. Upon further investigation I discovered that faulty ac condensers, and compressors are very common problems in certain GMC, Chevy, and Cadillac vehicles. Why are consumers stuck paying out of pocket for known defects that are in excess of $800?

- Grand Blanc, MI, USA

The A/C went out. Have 36000 miles this shouldn't be messing up.

- Baytown, TX, USA

The air conditioning started blowing hot air while moving. The truck is only 4 years old with 75000 miles on it. In doing research we have learned that this is a common problem with the GMC Sierra's and it not covered by GM even though it appears to be a design flaw.

- Tidioute, PA, USA

Like so many others, my truck is not very old and has been blowing hot air for months. It appears to be the same condenser issue as reported by hundreds if not thousands more. After discovering this is chronic issue and ac delco * discontinued the original condenser * issued tsbs for the condenser which include a bracket to help prevent the issue (tsb pit5331 / Oct 2014) (tsb pie0340 / May 2015) neither of these were either applied to my vehicle or were not effective in preventing the issue. It seems obvious that this is a defect in materials and workmanship based on their issuing of these tsbs and failure to recall these vehicles under warranty. They've apparently operated a blatant "let's wait and see" campaign, hoping those of us that didn't catch this under warranty will fall out of warranty as I have. Several law firms have initiated class action suits against GM in regards to this, but it seems like that's a good chance to get lawyers rich and not get my truck fixed, or get a check for $9.99... as a summary - my truck began blowing warm air last fall, but I didn't recognize it as an issue as the weather was also turning cool and I wasn't using the A/C. ac/delco and General Motors knows this is chronic and avoidable issue the faulty parts have been replaced when the products fail under warranty no effort has been made to replace the knowingly faulty parts.

- Imperial, MO, USA

Air conditioner blows hot air as a result of line system leak. Air conditioning failure do to known tsb pit5331. GMC has covered this issue for like SUV models (escalade, Tahoe, Yukon), but wants over $1,000 to repair GMC Sierra 1500 at GMC dealership. This is a faulty product design that is a known problem per their own service bulletin, and associated harness to enforce faulty air conditioner unit design.

- Sparks, NV, USA

2015 GMC Sierra 1500 air conditioning has stopped working. This appears to be a very common problem and GMC has only issued spotty recalls for it. My truck has 46,000 miles and now my children get to ride in a hot vehicle because GM will not help with repair.

- Cookeville, TN, USA

Takata recall 2015 GMC Sierra 1500 bought it new. Started haveing may a 2016 the ac went out and I was traveling and 3 of the pistons stop working so I took it to a near GMC dealership they got repaired a trip made it back home for months later my engien stop working they said they needed to get the computer tested in case I damaged the engine and was proving that I didnt couse no damage engine they replaced the engine a year later in 2017 around December the transmission and GMC replaced that god it was still under warranty and now again in 2018 and November my ac went out again I'm haveing attained to fix it because of what they charge to replace it a new vehicle am still paying and so many problems what am I really paying for junck. I have had a 2013 with no problem that's Y I upgraded. Believe me I dont think.of up grading any more my truck is at 90.000 miles not am suck fixing a $500 truck it's sad.

- Houston, TX, USA

A/C condenser is leaking - blowing hot air

- Gray, GA, USA