Horn Assembly Problems of GMC Acadia

After placing my car in park, and trying to cut off the engine, it alerts me to "shift to park" . . . I will have to restart my engine, put it in neutral and then back to park, and try again to shut off the car. Sometimes it works on the second attempt, but usually takes 3-4 times of cutting engine off and on, shifting from park to drive to park again. If you attempt to exit the vehicle, the horn will start to honk, and alarm goes off. The car is clearly in park, the shifter can not move forward any further, and the indicator says its in "park" it is only after you press the start/stop button that the alarm indicates it needs to be "shifted into park".

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Vehicle does not recognize it's in park. Vehicle won't shut down completely,it honks horn and beeps inside and won't let you lock doors or restart car. Haven't noticed it rolling away like many people state. . . Jerking the shifter seems to get it working so far . . Haven't been stranded yet. Vehicle was stationary in a parking lot.

Vehicle does not acknowledge that you are in park and will not turn the vehicle off completely. The engine shuts off, but lights and everything else stays on. If you exit the vehicle it beeps and the horn honks.

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Hello, is anyone investigating the horn problem with the 2017 GMC Acadia that is well-documented in many places, including your own NHTSA website? the same problem likely exists with the 2018 models as well. This has been an issue since the '17 models were first introduced in 2016 and gm says they can't fix it. A safety issue and they can't fix it? this vehicle needs to be recalled before someone gets hurt, or worse. Gm dealers are still selling these vehicles to uninformed buyers and they will not fix the problem.

Horn button is very difficult to activate. Takes 2 hands to depres. . . Safety concern.

Two month old 2017 GMC Acadia denali fwd. Horn is nearly impossible to operate under any conditions. It takes two hands to make it work and only with excessive force, and in only one spot on the steering wheel. Recently I was alongside of a big rig and the driver did not see me. He started to maneuver into my lane and the Acadia horn would not work. Nearly caused a major accident on a 70mph posted highway. The dealer knows about the problem and it has been reported to GMC and NHTSA by many 2017 GMC Acadia owners. To date, GMC offers no fix for this problem. A recall or at least a repair bulletin needs to be issued before someone gets hurt, or worse. This is a widespread safety issue with the 2017 GMC Acadia, and possibly the 2018 GMC Acadia if the same horn activation hardware is used in the newer model.

The vehicle has had ongoing issues since it was purchased in June of 2017. The �shift to park� problem had to be fixed twice, the emergency braking system engages itself for no apparent reason which has almost caused several accidents, the horn does not work when needed in emergency situations, the headlights are so dim it's dangerous, the battery has drained and left my wife stranded 4 times, and the vehicle has a very rough idle and it almost stalls out. I attempted to work with gm to have them take the car back early (lease) and the request was recently denied. This is my 3rd Acadia and it by far is the most dangerous car I have ever driven. I am now reading about a fuel pump problem that could cause the vehicle to catch on fire, a driveshaft that may separate while driving, and a faulty braking system that could cause the vehicle to lose all braking capability. I do not feel safe having my family in this car and I am requesting your assistance to help me work with gm on a resolution. I entered the date that the vehicle first started to have issues, there have been over 20 incidents over a 2. 5 year period causing a safety issue or leaving my wife and children stranded.

While driving, the horn failed to activate when depressed. Subsequently, when parked, the horn required excessive pressure to activate (two hands). Took the vehicle to the dealer, the service advisor tried the horn and agreed that it required excessive force to blow the horn. P/n 84050792 was replaced with no change in the pressure required to blow the horn. Research shows multiple complaints regarding the same issue.

Horn is so hard to push no one in my family can sound horn guys at dealer could not get it to sound without excessive force this is highly dangerous no one at the dealer or GMC will fix it they say it was the way it was designed again very dangerous some one needs to fix this flaw before someone dies in an accident because they were unable to sound horn to avoid collision I would have never imaged buying a brand new car I would have unresolved safety concerns with the answer from GMC and the dealer being we aren't fixing it so I guess you shouldn't drive it that's the fix not to drive my one and only brand new car how about GMC or the dealer making my brand new car safe and fixing their problem!!!!! there needs to be a recall for this horn.

It is very difficult to sound the horn. It takes multiple presses and often won't sound without use of both hands. This is a safety hazard. It is an ongoing hazard.

New 2017 GMC Acadia denali fwd. Less than 100 miles. Horn does not operate with normal driver pressure under any conditions. Requires excessive pressure to operate, requiring using both hands and then only in one spot. Gm is aware of the problem and has done nothing to correct, calling it is operating "as designed". The design is flawed and gm fails to admit it and take corrective action. It is past time that this problem is fixed, as it has been reported many times by other GMC Acadia owners and is on record with the NHTSA. Does someone have to be killed before a fix is released? does someone have to be killed before the NHTSA acts on this potentially lethal defect?.

The horn is very hard to honk. It takes my wife both hands to activate the horn. I have seen similar complaints on the computer. I have been back and forth with a gm representative for about 5 moths and have gotten nowhere. They apparently do not see this as a safety concern. I do. I have taken the car back to the dealer and they said they adjusted the horn, but there was no improvement. We checked 3 other Acadias on the lot, and they all had this problem.

Horn will not honk unless excessive pressure is applied. It takes 2 hands to honk the horn. I have never seen a horn that required more than 1 finger to honk.

I bought a new 2017 GMC Acadia denali the end of February and the next day found out that the horn does not work. The horn is extremely hard to push and requires extra pressure with both hands and arching my back against the seat to try and make the horn to work. I have been back to the dealers 3 times in 2 weeks and it is not fixed. There are only 644 miles on this new SUV and my wife will not drive it because it is a safety concern with no horn.

The contact owns a 2017 GMC Acadia. The contact stated that the horn worked intermittently. The contact stated that extra pressure was needed to depress the horn in order for it to sound. The contact was concerned about the safety of the vehicle due to the failure. The dealer diagnosed that the vehicle operated as intended. The vehicle was not repaired. The manufacturer was notified of the issue. The approximate failure mileage was 633.

The contact owns a 2017 GMC Acadia. The contact stated that while driving, the horn failed to activate when depressed. The vehicle was taken to the dealer where the steering wheel assembly was replaced but failure continued to occur. The manufacturer was notified of the failure. The VIN was not available. The failure mileage was 700.

The contact owns a 2017 GMC Acadia. The contact stated that the horn took excessive force in order to operate. As a result, the vehicle was involved in an side impact collision because the driver could not alert the other driver of their presence. A police report was not filed. The vehicle was taken to the collision center where it was repaired. The contact was also informed by the dealer that this failure was common among this particular model vehicle. The manufacturer was notified of the failure. The manufacturer stated that the vehicle was designed with that particular failure. There were no injuries. The failure mileage was approximately 600.

The contact owns a 2017 GMC Acadia denali. While driving at an unknown speed, the horn failed to sound. The vehicle was taken to a dealer where it was diagnosed that the horn was poorly designed. The vehicle was not repaired. The manufacturer stated that the vehicle was functioning as designed. The approximate failure mileage was 400.

Horn has not worked from day one. Dealer says can't fix until gm redesigns a solution. Sad.

The contact owns a 2017 GMC Acadia. The contact stated that the horn did not function unless an abnormal force was exerted. The vehicle was taken to two dealers where it was confirmed that it took an excessive amount of force to get the horn to work. There was no remedy for the repair. The manufacturer was not notified. The VIN was unknown. The failure mileage was approximately 1,800.

The contact owns a 2017 GMC Acadia. The contact stated that it took a tremendous amount of force to engage the horn. The vehicle was taken to a dealer where it was diagnosed that the design of the horn was normal, and no failure or repair was needed. The manufacturer was not notified of the failure. The failure mileage was 700.

My 2008 Acadia transmission failed as I exited a highway (70 mph) and was going up the exit ramp. It began bucking like a horse. Once I pulled over and parked, I could not go in reverse. The car had to be towed and a new transmission had to be put in it after only 56k miles. Also have had the sunroof / moon roof trays overflow because the drainage tubes are not large enough to drain all the water from the trays. The dealership stated it was a poor design and nothing could be done to replace it. Now water has entered my vehicle causing the electrical box to become wet causing the horn to blow randomly and the car to continue running after turning it off and removing the key.

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