My vehicle has a severe launch shudder in 1st gear from a stop, and while driving along when I-??m in 4th gear, or during the 2-3 upshift or 3-2 downshift. It shakes the entire suv so bad I have to stop accelerating. The vehicle becomes uncontrollable which is a major safety risk.

- Zanesville, OH, USA

2nd time AC compressor motor breaks and as is in line with the serpentine belt, all other systems including electrical and engine stop working. Poor engineering or other reason causing part to break down.

- Mckinney, TX, USA

Today I encountered a problem with my vehicle that not only put myself at risk but my children. This problem came out of no where since I have not had any problems with my vehicle before today. When going to leave I turned my car on to have it stall and die. I had someone come out and look at it and got it to work by pushing down on the gas pedals. Said nothing looked wrong since there were no check engine light or any codes coming up on the dash. So I proceeded to leave and go get gas. When going to start my car again it stalled yet again and showed a check engine light. The car then started to smell like smoke and gas to where I immediately turned to car off and had my kids get out. I then tried to start my vehicle again and thankfully was able to get it to work with the check engine light showing. I called the car dealership that I go to for my oil to let them know I-??m coming and that it stalled again with the check engine light showing. I made it to the shop and they ran diagnostics on it to show that it was a time change in the engine that was messing up. They then proceeded to let me know that I would have to go to a GMC shop because they can-??t do the work at their shop. He then proceeded to tell me not to drive in this because the car will stall in motion and will not go faster than 45 without dying or shutting off. Which to me is a major safety concern since I have to drive it to the shops and let along home with my children in the car. So the whole way I couldn-??t go over 45 without my car starting to stall and shake. Thankfully it didn-??t shut down with my kids in the car on a main road.

- Milford , IA, USA

The contact owns a 2015 GMC Acadia. The contact stated that while driving at various speeds, the vehicle stalled in the middle of the road without a warning light illuminated. The contact received assistance from the police to push the vehicle to the shoulder of the roadway. The contact attempted to restarted the vehicle which failed to start. The vehicle was towed to D'arcy Buick GMC (2022 essington rd, joliet, il 60435, (815) 671-9010) where it was diagnosed however, the mechanic was unable to duplicate the failure. The manufacturer was notified of the failure however, informed the contact that no fix was available for the vehicle. The vehicle was taken to an unknown dealer and the contact was informed by the technician that there was no fix for the failure. The failure mileage was approximately 17,000.

- Homerglen, IL, USA

I just purchased this car three months ago, the A/C is no longer blowing cold air. The air blows but not cold and the heat works just fine. From what I've read online, this appears to be a common issue on this make and model. Please address this..

- Austin, TX, USA

Every time I go to the gas station after filling up my truck with gasoline, my vehicle will not start up right away. I have to press the gas pedal lightly in order for it to start up. This just started recently.

- Saugus, CA, USA

When you turn traction control on the entire car shakes. Windshield wiper fluid will not come out. Passenger window will not roll up from driver control. Tire pressure monitor system has been out for time. This car is not that old for it to have all these issues

- Jacksonville, FL, USA

Ist time-car stationary-started car and it started shaking-tractionary control warning came on-turned car off-waited a few minutes and turned it on and it was fine -the next day after driviing 250 miles it happened again after stopping for a toll booth-the car shut down with the same warning-after two tries it started and we drove to a Chevrolet dealer and they replaced the throttle body

- South Lyon, MI, USA

On 4/11/18 we took the car to the dealership for a side dtection alert. Was informed that the right side module needed replaced. We declined service due to cost of $628. 01/2019 we were have problems with the car starting. Last week multiple warning a messages started appear on the dashboard as the car was traveling and stationary. Took the car in for service and diagnoses was the right side detection model had severe corrosion and the left side model also had corrosion. Parts where not available so we drove the car home. Next day same issue with multiple warnings and alerts on the dash. My wife was able to make it home and after turning off the car it would not start even after charging the battery. Next day had the car transported to the dealership. After disconnecting the side sensor models, the car restarted and started functioning normal. Obviously this is a big saftey concern for a vehicle that is less than 4 years old, less than 50K miles, garage kept and well care for.

- Avon, OH, USA

Immediately after filling the tank with gas, I started the engine and it accelerated to full capacity. The engine had made clicking sounds, and other sounds when it started.

- Crockett, CA, USA

Service stabilitrak--traction control off! message, then car ran rough and lunged on acceleration. This happened at 5,000 miles, repaired at dealer. Again about 12,000 on a trip and reset itself. Now, at 20,000 miles sames message and is at the dealer being repaired. This is a safety hazard. Please investigate this.

- Chesterfield, MO, USA

The contact owns a 2015 GMC Acadia. The contact stated the vehicle stalled without warning. The contact restarted the vehicle, but the failure recurred whether driving or parked. The contact took the vehicle to the dealer; however, the dealer was unable to identify the failure and diagnose the vehicle. The vehicle had not been repaired. The manufacturer stated that further evidence regarding the failure was needed. The approximate failure mileage was 18,860.

- Chandler, AZ, USA

Driving at 34-45 mph lose all engine power and have to pull over. Vehicle totally loses all power. Engine shuts off.

- Avon Lake, OH, USA

After picking up our new truck we noticed that the vehicle's engine was short jumping at low speeds, especially when in traffic - at first when this occurs you have to almost ask yourself did I hit the gas pedal instead of the brakes. After only a couple weeks of ownership we dropped off our new vehicle to be repaired. Dealer 's GMC certified technician had to consult with GMC corporate to help troubleshoot and then decided to replace the lower and upper engine valve covers, and the transmission control module; which was a quick fix that lasted a little over a week. Now our brand new vehicle is once again a lemon and repeating the original issue. After contacting GMC and after requesting another safer new vehicle since its common sense that a brand new truck should not have any internal engine or transmission problems being that we have a four year old, two year old, and a newborn, I am a concerned for my family's safety; GMC corporate response was "don't you think that 1 car in 300,000 would have an issue"... at the end we are not talking about a loose belt or wheel out of balance, but an internal problem which there tech told my wife that he could not guarantee that the care was safe during his test drive. The dealer's manager response was "the car is not our problem when it leaves our lot", it then falls under the manufacture warranty; which makes sense, but once again we are talking about a brand new car, not a car that has some usage. Now twenty days in the shop and only 2,000 mile on the vehicle they decided to replace the transmission, but still can't tell us what is wrong with the vehicle; which now when braking on the highway it downshifts hard and almost feels like somebody rear ended you.

- Danbury, CT, USA

Bad shifting in transmission when you slow down or come to a stop and turn right and accelerate at the same time. This happens on the 2014 and 2015 models, tranmission will stutter and abruptly shift into a lower gear. On the Acadia forums it is documented by other owners as well (approx 30-50 other owners). The transmission needs a reprogram to account for this issue. GM appears to not be doing anything about this common issue.

- Hanover Township, PA, USA