GMC Acadia 2019 — Problemas relatados

* DTC PO128: Engine Coolant Temperature Below
Thermostat Regulating Temperature * "Steering Assist Is Reduced - Drive With Care" displayed while driving * AC not functioning properly * Engine temperature gauge pinned at "Cold" * Cooling fans continue to run after shutdown

When putting the vehicle in park to turn it off, the dash indicates that I need to put the vehicle in park. But it is in park and it will not let me shut off the vehicle.

My driver side front control arm, and stabilizer bar snapped on me while on the highway without warning causing me to crash. I'm blessed to be alive.

While attempting to turn vehicle off, the message shift to park was given. Could not shut vehicle off! Has happened multiple times in the past, then disappears for awhile. Comes back again at will. Have seen multiple complaints on this issue falling back to a defective micro-switch within the shifter assym. Former GM tech here---

I own a 2019 GMC Acadia equipped with the 3.6L V6 engine. VIN. See form above In 2025, the engine coolant thermostat failed on my vehicle and required replacement at my expense. I am submitting this complaint because I believe this may represent a recurring component problem affecting 2019 GMC Acadia vehicles and I would like NHTSA to determine whether the condition presents an unreasonable risk to motor vehicle safety. General Motors has published service information addressing thermostat-related conditions on GMC Acadia vehicles equipped with the 3.6L engine. GM has also issued special coverage for an engine coolant thermostat condition on certain GM vehicles. GM’s special coverage describes a thermostat that can open at a lower temperature than intended, resulting in a malfunction indicator/check-engine light and diagnostic trouble code, and in some cases causing the engine cooling fans to continue running after the vehicle is shut off. My 2019 Acadia uses the 3.6L engine and the thermostat assembly addressed in GM’s service information. Despite this, my 2019 model year is not included in the current extended thermostat coverage. There is also a second, independent occurrence involving the same model year. My father owns a separate 2019 GMC Acadia, and the thermostat on his vehicle also required replacement in 2026. These are two separate vehicles that experienced thermostat failures requiring replacement. I understand that a thermostat failure is not necessarily a safety defect by itself. However, I am concerned that a recurring failure of this component could potentially create a safety risk depending on the failure mode and resulting vehicle condition. I am therefore asking NHTSA to review the available consumer complaints, manufacturer service information, warranty data, and GM special-coverage actions to determine whether there is a safety-related defect affecting 2019 GMC Acadia vehicles equipped with the 3.6L engine.

The contact owns a 2019 GMC Acadia. The contact stated that the fuel gauge displayed an inaccurate fuel level. The fuel sending unit was replaced twice; however, the failure persisted. The contact became aware of the recurring failure while refueling the vehicle and noticing that the vehicle consumed more fuel than the fuel gauge indicated. The vehicle was taken to the dealer, where it was determined that the fuel sending unit needed to be disassembled for further diagnostic testing. The manufacturer was notified of the failure by phone. The failure mileage was 64,382.

I am submitting this complaint to request that NHTSA investigate a potential safety defect involving the engine coolant temperature monitoring system, thermostat/engine coolant temperature sensor system, and its relationship to reduced steering assist in 2019 GMC Acadia vehicles. My 2019 GMC Acadia, currently at approximately 91,500 miles, has experienced the following symptoms: • The engine temperature gauge remains flat or reads abnormally low/cold. • The cooling fans run continuously at extremely high speed, creating a loud "screaming" fan noise. • The vehicle displays the warning message "Steering Assist is Reduced — Drive with Care." • The vehicle has a history of diagnostic trouble code P0128, "Engine Coolant Temperature Below Thermostat Regulating Temperature." I am concerned that these symptoms are related and represent a potential safety defect rather than an isolated thermostat or cooling-system repair. GM has issued bulletin PIT5967, "Service Steering Message With P0128," which applies to GMC Acadia vehicles from model years 2017 through 2023. The bulletin states that when P0128 is present, the ECM may be reading coolant temperature incorrectly and that a "Service Steering Message" may be displayed to protect the steering gear in the event of an undetected overheating condition. GM instructs technicians to diagnose and repair P0128 first. GM bulletin 17-NA-158 also describes a relationship between P0128, an invalid coolant-temperature signal, and the "Steering Assist Reduced, Drive With Care" warning. The bulletin explains that the steering module relies on valid coolant-temperature information to provide additional steering assistance under cold conditions. Also will not register when put in park. Getting error message "shift to park" take multiple restarts of the vehicle and shifting gear back and forth for it to register.

Vehicle continued to have Shift to park message when car was already in park. This is a known issue in some other GMC vehicles. Safety issue that the battery could drain or the car could roll unexpectedly. This message repeatedly displayed on the vehicle. The dealer confirmed the problem and performed the repair. Repair order number is XXX for 549.17 on XXX at Boucher Buick GMC of Waukesha [XXX].While there isn't a recall on file for this specific VIN number, I believe it should be included in the recall and I am requesting reimbursement. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On XXX at 1:56pm, I took the vehicle to Jiffy Lube service center #810 for the "Quick Oil Change Service" which includes checking and filling the Tranmission/Axle fluid. Per the attached receipt the Transmission/Axle fluid was "OK", and the next service was recommended after 5,000 addtional miles from the then current mileage of 153,317. On the morning o XXX, the car began experiencing issues identical to vehicle recall NHTSA ID Number: 20V668000. The check engine light turned on and the vehicle could maintain proper propulsion. On XXX at 3:25pm EST, I took the vehicle to AutoZone store #01664, whose "FixFinder" computer diagnostic inicated code PO700 "Transmission Control Module Requested MIL Illumination". On XXX, I had the car towed to a private mechanic who inspected the Vehicle and indicated that the transmission had "no fluid" despite having the fluids verified by Jiffy Lube on XXX. The mechanic suggested there may be a GMC service issue that required GMC remediation to due faulty internals which resulted in the transmission fluid leakage and subsequent triggering of the transmission computer module and related propulsion failure. As of today XXX, the vehicle is experiencing the same condition as indicated in vehicle recall NHTSA ID Number: 20V668000, which is creating additonal risk of vehicular accident/crash and vehicle fire in the presence of the ignition source. The milage is now 155,520. I am requesting this vehicle be serviced as part of recall NHTSA ID Number: 20V668000, you can verify from the vehicle registration from the Divison of Motor Vehicles and via CarFax that I purchased this vehicle used, the vehiclee has at least 1 (maybe 2) prior owners. I am requesting the vehicle (VIN [XXX]) receive the mandated recall service which will resolve the afformentioned issues and remove the related risks for myself, my passengers and all other motorists who are sharing the road. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, the engine seized, with several unknown warning lights illuminated. Additionally, the battery low and steering assist warning lights were illuminated. The contact's minor children were occupants in the vehicle during the failure. The tow truck assistant arrived. The tow truck driver assisted with restarting the vehicle. The contact was able to restart the vehicle. The vehicle was taken to Firestone; however, the failure was not duplicated. The contact stated that a portable diagnostic tester was attached, but no error codes were displayed. The failure reoccurred. The vehicle was taken back to Firestone, where it was diagnosed with a failed START/STOP module. The contact was informed about Technical Service Bulletin: 21-NA-139. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 81,126.

See attached file

The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, the transmission failed to properly shift gears and the vehicle failed to exceed 40 MPH while driving. The contact stated that the transmission failed to shift above third gear. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who discovered that there was no transmission fluid inside the torque converter. The vehicle was scanned and displayed an issue with the transmission control module. The local dealer was contacted and confirmed that the VIN was not included in NHTSA Campaign Number: 20V668000 (Power Train). The vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline to report the failure. The approximate failure mileage was 154,429.

shifter micro-switch is not working and is available for inspection upon request. Vehicle is not shutting off as it is indicating shift to park. The vehicle unable to shut off can cause issues while parked in the garage still running and worried about causing a fire. Problem diagnosed by private individual but have plans on taking it to dealership. The shift to park indicator issue has been occurring for almost a year and has progressively gotten worse. I have noticed other vehicles with the same make/model/year have had similar issues with known defects that a recall was issued.

I was at a red light, I went to drive as the light turned green and my car stopped and wouldn’t drive, I could go into neutral to get out of way but anything the car would stop. There is no codes or lights turned on my dash though.

I am submitting this complaint to request that NHTSA investigate a potential safety defect involving the engine coolant temperature monitoring system, thermostat/engine coolant temperature sensor system, and its relationship to reduced steering assist in 2019 GMC Acadia vehicles. My 2019 GMC Acadia, currently at approximately 61,500 miles, has experienced the following symptoms: • The engine temperature gauge remains flat or reads abnormally low/cold. • The cooling fans run continuously at extremely high speed, creating a loud "screaming" fan noise. • The vehicle displays the warning message "Steering Assist is Reduced — Drive with Care." • The vehicle has a history of diagnostic trouble code P0128, "Engine Coolant Temperature Below Thermostat Regulating Temperature." I am concerned that these symptoms are related and represent a potential safety defect rather than an isolated thermostat or cooling-system repair. GM has issued bulletin PIT5967, "Service Steering Message With P0128," which applies to GMC Acadia vehicles from model years 2017 through 2023. The bulletin states that when P0128 is present, the ECM may be reading coolant temperature incorrectly and that a "Service Steering Message" may be displayed to protect the steering gear in the event of an undetected overheating condition. GM instructs technicians to diagnose and repair P0128 first. GM bulletin 17-NA-158 also describes a relationship between P0128, an invalid coolant-temperature signal, and the "Steering Assist Reduced, Drive With Care" warning. The bulletin explains that the steering module relies on valid coolant-temperature information to provide additional steering assistance under cold conditions. When the coolant-temperature signal becomes invalid, this function can become inoperative, potentially resulting in a heavier-than-normal steering feel.

WHEN I PUT THE CAR IN PARK, I GET AN ERROR MESSAGE THAT SAYS SHIFT TO PARK AND IT TAKES PUTTING IN PARK NUMEROUS TIMES TO GET IT TO CLEAR SO I CAN TRUN THE CAR OFF AND LOCK IT. I KNOW THERE HAVE BEEN SOME MODELS THAT HAVE BEEN RECALLED DUE TO THIS PROBLEM, HOWEVER MINE IS NOT INCLUDED IN THAT RECALL. I WOULD LIKE TO KNOW WHY IT IS NOT INCLUDED AND IF THERE IS ANY HELP AVAILABLE TO CORRECT THIS ISSUE.

For the past 4 months after turning off the engine, my vehicle is failing to recognize that it is in Park. I am getting a message on my display stating “Shift to Park”. This is preventing my vehicle from shutting down.

I purchased vehicle used 2 years ago last year. I noticed the air conditioner was not cooling. I summed it up too, and extremely hot summer.This summer I did the same thing.I took it in immediately. Catastrophic, I think I bought it like this. It fell apart, the air conditioning compressor fell apart.There is like shrapnel through everything, and they have to go through and clean everything out.It's gonna cost me over two grand. But it only be in 40000 miles on it. I understand it's a twenty nineteen, but owner said at forty thousand miles.This should never happen.

Steering assist code pops up and then the temperature gauge goes down and the air stops working and the screen in the cars starts going all crazy. Shift to park code keeps coming up and keeps all electronics on in car

Fire Started in Center Console

• Gearshift- It is, available for inspection upon request. • You are unable to turn off Vehicle, your trapped in vehicle. Until parking gear shifts into park and you’re able to shut off the vehicle. • Independent service center. • No • No

Shortly after purchasing my 2019 GMC Acadia with 52,000 miles on it, my wife parked the vehicle in our driveway and shifted the transmission into Park. When she pressed the push button to shut the vehicle off, the instrument cluster displayed a "Shift to Park" message even though the shifter was already in the Park position. Because the vehicle did not recognize that it was in Park, it would not shut off completely. The radio remained on, and the doors could not be locked. The only way to get the vehicle to shut off was to repeatedly shift from Drive to Park until it finally recognized Park. This occurred multiple times. After researching the problem, I discovered that many other GM owners have experienced the same "Shift to Park" failure. I believe this is a widespread defect that should be investigated because it can prevent a vehicle from shutting off properly, leave electrical accessories powered on, drain the battery, and prevent the vehicle from being secured when parked.

Shortly after purchasing my 2019 GMC Acadia with approximately 52,000 miles, the vehicle displayed a "Steering Assist is Reduced. Drive with Care." warning message and illuminated the check engine light with diagnostic code P0128 00 (Engine Coolant Temperature Below Thermostat Regulating Temperature). I disconnected and reconnected the battery, after which both the warning message and check engine light disappeared. However, the engine coolant temperature gauge then began behaving erratically. On multiple cold starts, the gauge would immediately indicate that the engine was already at normal operating temperature even though the engine had been sitting long enough to be completely cold. This led to a diagnosis of a thermostat and/or engine coolant temperature sensor failure. After researching the issue, I found many other owners reporting the same thermostat and engine coolant temperature sensor failures. I believe this is a widespread defect that should be investigated because incorrect coolant temperature readings can prevent the driver from knowing the true engine temperature and may result in improper engine temperature regulation, overheating, and possible engine damage.

Problem 1: I got the car 2 years ago, and it keeps telling me to "Shift to Park" even though its in park. That's been happening for the whole time I've had it. It does throw a code for it on the scanner machine. I have to shift it back and forth sometimes 3 times and sometimes 17 times. It just keeps beeping over and over and won't shut off. I am having a mechanic look at it Tuesday but hoping it doesn't cost a lot. But no recalls on my car. Problem 2: For the last 4 months or so it keeps saying steering assist is reduced drive with car. It's being looked at Tuesday as well. I have 109K on my car, and got it at 86K.

The contact owns a 2019 GMC Acadia. The contact stated that upon parking and attempting to turn off the vehicle, the message “Action Required. Shift to Park” was displayed while the gear shifter was in park(P). The vehicle failed to turn off. The contact moved the gear shifter back and forth until the vehicle registered it was in park (P). The vehicle was taken to the dealer, who replaced a wiring harness and switch. The manufacturer was not made aware of the failure. The failure mileage was approximately 56,757.

Thermostat in these are all bad and everyone keeps having problems with them. Also forward collision warning and steering stability warning come on. Thermostat needs to have recall. Everyone is having the same problems.

The contact owns a 2019 GMC Acadia. The contact stated while the vehicle was parked, the shift to parking warning light illuminated. In addition, the contact stated that the failure occurred while the vehicle was parked. The vehicle was taken to an independent mechanic, however the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact referenced an unknown recall; however, the VIN was not associated with a recall related to the failure. The dealer was made aware of the failure but provided no assistance. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline and report the failure. The failure mileage was unknown.

When I shift my 2019 GMC Acadia into park, the warning message reads shift to park and there is a ding warning that plays for several mins. This has been going on for over a year. I took it to the dealership and they said they could repair it for 1000 dollars but the solenoid was only guaranteed for 30 days. There is no possible way a dealership can expect a person to pay 1000 dollars a month to keep their family and transportation safe.

READ BELOW WE HAVE STATED THE SHIFT TO PARK ISSUE ON MOST GMC VEHICLES

My car will not shut off when shifted into park. I get a shift into park message.

The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, a “Steering Assist is Reduced ” warning message unexpectedly displayed. The contact also stated that the thermostat became inoperable. Additionally, the thermostat information was no longer displayed on the instrument panel. The vehicle was taken to the dealer, where it was diagnosed that the thermostat had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for further assistance. The failure mileage was approximately 48,500.

I am getting the 'SHIFT TO PARK' error message when I put the vehicle in park. When I looked up the error this is what I got... but I don't see a recall for my vehicle. The "Shift to Park" message in GMC Acadias (2017–2019, primarily) is a common, known issue caused by a faulty microswitch in the shifter assembly that fails to recognize when the car is in Park. This defect prevents the engine from shutting off, drains the battery, and requires a replacement of the shifter switch or assembly.

My check engine light is on there is a note that says steering assist is reduced. I took it to O’Reilly’s to get it scanned. The code that comes up is P0128 indicating that the coolant thermostat has a fault. There are other GMC‘s that have a recall for this, but apparently not mine.

The contact owns a 2019 GMC Acadia. The contact stated that the vehicle failed to shift into park and failed to shut off. There was a shift to a park error message displayed. The vehicle was taken to the local dealer, where it was diagnosed with a contact issue in the transmission box. The vehicle was not repaired. The manufacturer was not notified. The failure mileage was approximately 91,355.

The contact owns a 2019 GMC Acadia. The contact stated that while the vehicle was parked, it was unable to recognize that the gear shifter was in park and experienced a shift to park failure. The dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 21,000.

This vehicle has an electrical deficiency when trying to park, The console will NOT recognize that the vehicle is in park, causing bell warnings, beeping, and an INABILITY to lock the vehicle, thus draining the battery. We cannot walk away from it, nor ever leave anything of value in it. This is a recurring problem, causing stress, and having to start, shut off, re-start, wiggling the shifter knob, MANY times and HOPE that the electrical system will recognize that the vehicle IS in Park. sometimes this can take 20 minutes, IF it works at all. If not, We have to leave someone IN the vehicle when this happens, in order to do anything! This is a KNOWN problem with this shifter, and there SHOULD be a recall on it!

My 2019 GMC Acadia suffered a "major trans fluid leak" specifically from the transmission accumulator feed pipe. Because of this leak, the transmission lost its necessary hydraulic pressure, leading to "internal damage". This is why I experienced harsh shifts and a complete "missing 3rd gear". This exact part and failure mode are the center of NHTSA Recall 20V668. The recall warns that missing bolts on the accumulator can cause a fluid leak, progressing to a total loss of propulsion—which is exactly what has happened to my vehicle.

2109 Acadia. The gear shift would not register as being in park when it actually was in park. This created an issue of the interior lights and radio not being turned off when the driver door was opened, posing the possibility of the battery being drained and the driver stranded. Upon searching, it was learned many Acadias have had this issue, including a friends'. This was reported to GMC Executive Resolution Team and that it cost us $341.38 to get it repaired. They refused reimbursement and have not issued a recall even though many Acadias are involved in this problem.

The contact owns a 2019 GMC Acadia. The contact stated that upon parking and attempting to turn off the vehicle, the message "Shift to Park" was displayed. The contact restarted the vehicle and was able to successfully park and turn off the vehicle after several attempts. Additionally, while driving at various speeds, the vehicle intermittently failed to shift as intended. Additionally, the A/C system was inoperable while driving. The check engine warning light was illuminated. The vehicle was taken to the dealer, where it was determined that the cooler and thermostat needed to be replaced. The parts were replaced; however, the vehicle was not serviced for the transmission failures. The contact stated that the vehicle was difficult to start, and the doors failed to close intermittently. The vehicle was taken to the dealer, where the battery was replaced. The contact stated that the transmission failure persisted, and there was an abnormal odor coming from underneath the hood. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was filed. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was unknown.

Ongoing problem with only solution is a recall notice. Power Steering Assist Reduced -Customer reports Power Steering Assist Reduced message displayed on DIC, A/C is inoperative, Engine Coolant Temperature Sensor inoperative. Recall needed to update Engine Control Module (ECM) with latest calibration.

The warning steering assist reduced, drive with caution appears. Shift to park appears. Temperature gauge drops to zero. Fan runs on high. A/C & heater don’t not work when this happens. We certainly do not feel safe driving our Acadia like this. Can’t trust that it won’t start on fire.

When shiftiing to park and turning the car off the message "Action Required Shift to Park". It is difficult to get the message to go away.