Engine And Engine Cooling Problems of GMC Acadia - part 1

I have a 2021 GMC Acadia that keeps saying steering assist not available. But when it does this, the temperature gage stops working and so does the ac. After you turn the car off the fan still runs for at least 10 minutes.

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While driving at highway speeds, a warning appeared on the driver information center (dic): “steering assist is reduced – drive with care. ” simultaneously, the temperature gauge was stuck on “c,” the radiator cooling fan ran at high speed, and the air conditioning stopped blowing cold air. After researching the issue, I discovered that these symptoms are commonly linked to a failing thermostat—a known and widespread problem with gm’s 3. 6l lgx engine. Unfortunately, replacing the thermostat on this engine is not a simple repair, often requiring significant labor and cost. The most concerning aspect is the loss of steering assist, which poses a serious safety risk, especially at highway speeds. Given the frequency of this issue across many gm vehicles, it’s clear that this is a defective part and not an isolated incident. Gm should take responsibility and cover the cost of repairs for affected vehicles. This is not just a mechanical failure—it’s a safety hazard that deserves immediate attention. I'm attaching a picture of the message as well a paid repair invoice from the work the dealer performed to replace the thermostat on my vehicle.

See all problems of the 2017 GMC Acadia 🔎.

Unknown my 2019 Acadia denali has/is been repaired 6 times in 1 1/2 years for engine oil leaks , has had transmission repairs twice , radiator repair and replacement. Also suspension warranty work as well . I feel the oil leaks is and has been excessive and dangerous due to no warning lights never displayed to alert me to check oil.

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The contact owns a 2012 GMC Acadia. The contact’s wife stated that while driving at an undisclosed speed, the vehicle lost motive power with the check engine warning light illuminated. The vehicle was able to be restarted; however, the failure persisted. The vehicle was towed to the dealer, but was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 172,000.

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Bought car brand new at 427 miles car started bucking shaking pulsating while driving bought to brennen GMC plattsburgh NY at 811 mile did same thing but worse brought back to dealership they put camshaft actuater and solenoid in at 6041 mile car was motor started knocking stalling controlable in traffic back at shop.

Car keeps throwing poo14 code for vvt sensor, I’ve replaced the sensors and checked wiring on the side of the road and no damage found, went online and read multiple complaints and recalls on the same issue I’m having with my car. I enter my VIN and no recalls have been found. I have a 2020 GMC Acadia denali 3. 6l v6. As well and the rear view camera cutting in and out multiple times anlmost causing an wreck. And a system update didn’t fix the issue.

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Shift to park issue known recall issue in other GMC Acadias . . . Vehicle will not lock into park and can not remove key anymore electrical still runs in vehicle causing the battery to drain . . . Now have to force vehicle to shift into park as best as possible but still does not fully lock into park gear anymore . . . I was shifting into park.

See all problems of the 2010 GMC Acadia 🔎.

I'm not sure of the exact sequence of events here, but there are multiple exhaust leaks. One is a crack somewhere in the catalytic converter that is now leaking exhaust from the back of the engine into the passenger compartment. The other leak is at the point of a bracket which fastens the two front exhaust pipes together. At the time we first noticed an exhaust leak sound upon cold start, there were are around 58,000 miles on the car. Now a month later there are still less than 60,000 miles on the car. The dealership originally estimated repair costs to replace the catalytic converter and two front pipes at $3,200. When I had another service garage look at the problem, they asked why the GMC dealer wasn't willing to replace the catalytic converter under the 80,000 mile / 8 year warranty. When I raised this with the dealership, they said this was a "gray area" becasue they believe what happened was that the exhaust bracket at the front pipes failed first, which then caused the catalytic converter to crack. Ultimately, they indicated they would be willing to pay parts and labor related to the catalytic converter (approx $2,000) if we paid the other $1,200 to cover the front pipes. What I don't understand is why, when both Chevrolet and Buick have extended their front pipe warranties on comparable model years of the chevy traverse and Buick enclave, which use the exact same part numbers for the catalytic converters and pipes to 150,000 miles/15 years, why GMC has not offered the same special coverage on the Acadia. Regardless of which cracked first, the front pipe bracket or the catalytic converter, there is likely an engine vibration/movement issue that casues the cracks, giving rise to exhaust venting into the passenger compartment. Since we have yet to be able to schedule the repair (catalytic converter was on back order), we can now only drive the vehicle with the windows down to lessen the exhaust smell. The Acadia deserves a special coverage advisory on this.

Got onto the interstate and suddenly my car stopped but didn’t kill. My traction control light said off and then it said reduced engine power and my fuel went down to e. I couldn’t go but my car was still running. I killed it then waited a minute and started it again and it started moving slowly. Then it said service stabliltrak and traction system but since the light have went off. Around the same time I started hearing popping and crackling sounds from my speaker and now I have no interior sound at all just popping sounds no matter if my car is started or not. I’m scared it’s going to catch on fire or something.

See all problems of the 2014 GMC Acadia 🔎.

Last week, the coolant gauge , on our 2019 GMC Acadia, was reading below "c". . . . The "steering assist" warning was disabled on the on-screen display and the air conditioning stopped working. Took the car to a mechanic, who read the codes. . . . Mechanic stated that all symptoms were based on a defective gm thermostat. The thermostat was "stuck-open" causing the "steering assist" to be disabled as well as the a/c from being disabled as well. It seems gm has updated the part since when the series of Acadia were manufactured. After getting it repaired, at of our pockets, we researched and noticed that thousands of other gm Acadia owners had the same exact 3 symptoms: (1) malfunctioning coolant reading (2) "steering assist" disabled (3) a defective ("stuck-open") thermostat. . . . . Symptoms were exactly the same for all parties involved. We have owned many vehicles never had a thermostat fail before 65k miles. . . . It became a safety issue since the car disables the "steering assist" based on the thermostat being stuck open. Contacted gm corporate which stated unless a recall, there would be no compensation. Gm needs to make it right for the thousands of gm owners whose car has the 3. 6l engine in short, this is a major issue since the car's steering system is not working correctly we would like a recall to be initiated. Thank you.

While 2 hours from home driving down the interstate with a full vehicle, the vehicle alarmed and the screen notified "no oil pressure, turn car off now". I pulled over immediately and we had to sit on the edge of the interstate for 45 minutes - a safety hazard for us and the surrounding traffic. The vehicle was towed to the nearest gm dealer, where they assessed the vehicle and advised that this is a known issue for 2024 and 2025 GMC Acadias and traverses. The vehicle failed to move oil and the engine was seized - a significant safety hazard. After a month, gm has informed us that zero replacement engines are available in the world and there is no timeline for replacement or repair and the vehicle is unusable.

See all problems of the 2024 GMC Acadia 🔎.

I bought a 2013 GMC Acadia with a 3. 6l engine and I was driving it home, and the engine locked up on me, and it didn’t throw a code or anything, it just shut off and wouldn’t start back up, and later I find out that it had an oil leak from somewhere and now I have to have the engine replaced, which is 13k dollars, the vehicle is located at walker Chevrolet in nitro wv, I’m a single dad of 5 children and I can’t afford to fix this vehicle at that price, I asked if they could take payments to replace it, and they said not and that they would not release the vehicle back to me until it is paid for, and now I’m stranded with 5 children with no way to go to the store or anything. The engine locked up on me in the middle of the four lane in st albans wv, and I almost got hit by vehicles that were behind me and everything.

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Shift to park vehicle does not recognize the gear shifter is in the park position. Vehicle does not fully shut down.

The contact owns a 2017 GMC Acadia. The contact stated that while driving approximately 10-15 mph, the vehicle made an abnormally loud blower motor sound while accelerating, before the vehicle lost motive power. The transmission was shifted to neutral(n) and pushed to the side of the roadway. The tpms warning light was illuminated. The vehicle was towed to an independent mechanic who determined that the transmission clutch had failed, and the transmission needed to be rebuilt or replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed there was no recall coverage or warranty coverage on the VIN for the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 132,000.

There was a recall for GMC premature timing chain engine recall. This recall was complete in 2011 but it did not fix the problem. The timing chain keeps breaking off the cam shaft sensor and needs to be replaced.

See all problems of the 2009 GMC Acadia 🔎.

Ratle sound in the engine thinking it may be the timing chain. Code p0430 came on stating catalytic converter bank 2 needs replaced. We replaced O2 sensor downstream on bank 2 code was cleared by shop. After driving a few miles same check engine light came on and I took it to the shop they hooked it up to run the code and it was the same p0430 again.

Component: shifter assembly & jumper harness safety concern: can't turn off vehicle - carbon monoxide poisoning, physical safety when parking not at home, as I would have to leave vehicle running. . . Message in dash was present when I brought vehicle to dealer. Dealer also replicated no inspection other than dealer. Part returned to me. Warning message has been coming on for past 60 days or so, progressively getting more frequent I receive a 'shift to park' message in telltale after I have shifted to park. At times, vehicle will not shut off until shifter is manipulated for several minutes. I have concerns that I cannot park vehicle in garage, if I cannot shut it off. Gm is well aware of issue, but has yet to recall them. Dealer actually had replacement shifter in stock for a same day repair. . I was charged $778. 98 for the repair, and gm's customer assistance center response to me simply was to file a complaint with NHTSA. My wife does not feel safe driving, as there is no guarantee vehicle will turn off. Dealer replicated issue when I brought to dealership. Dealer has replaced part and has them. Warning lights only appeared when problem reared itself, initially began about 60 days ago, but is not occurring on approximately 2 of 3 shut downs.

The contact owns a 2021 GMC Acadia. The contact stated that after a routine maintenance at the local dealer, it was noticed that the radiator was leaking coolant. Upon further inspection, the contact and his son noticed that the driver’s side of the radiator was corroded. No warning light was illuminated. The vehicle was not repaired due to the cost. The manufacturer was made aware of the failure. The failure mileage was approximately 32,175.

I was driving along [xxx] . I stopped at walmart and shopped for about 2 hours. I was leaving walmart and was stopped at a red light at the exit from walmart [xxx] and traction control light comes on and a message came up and stated traction control off and to service stability control and the vehicle loses power right at the light. I checked everything I could and dis connect the battery for about 30 minutes and connected the battery back up vehicle still would not start. After sitting there for 3 hours the vehicle starts up. A week later the same thing happens again. I had to go through all the steps again so after a couple of hours. The vehicle started up. A few days later it happens shin but this time I'm at a stop sign on a busy road. I called road side service for a tow. No one showed up so I went through ll those same steps of disconnecting the battery and hooking it back up after a couple of hours and it stated up. I drove it home and started doing some research and found something saying to change the brake pedal position sensor so I done that and it worked for a few days and started doing the same thing all over again. S week later I drive it to the store and got almost home and the vehicle shut down again and would not start back up. I had it towed to my uncle shop nd he done a diagnostic on it and got about 4 or 5 codes. All of those things are very expensive to purchase. I just ran the VIN to check for recalls on the vehicle but couldn't find any but it should have been a lot of recalls because there are so many of these vehicles the exact same model and year with trouble with stability control nd brake and traction control issues. All the issues they hd on this car tht I have should not have been sold to anyone except the manufacturer. I wish I could just get my money back that I paid for it. $4700. 00 not included in the work I had done like the cv axles replace on both sides in the front. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I've had the engine stall before coming to a complete stop on several occasions. It also has been shifting hard and has had a delayed shift. The other day all of the lights to to screen and speedometer completely went out while driving then randomly came back on. That's the only speedometer I have is the digital screen.

See all problems of the 2023 GMC Acadia 🔎.

Transmission issues.

While driving the thermostat will go to zero and the steering assist is disabled. I have read a lot of forums that this is a known issue. The only way to reset it, so we have a/c is to disconnect the battery and it will last a day or two and do the same thing.

While I was driving a code came on my dashboard that read "steering assist is reduced drive with care". Soon after my check engine light came on. I pulled over not knowing what was happening. I took it to the garage to have it looked at and the mechanic stated that there are over 1000 GMC customers with this same issue and that the thermostat is stuck open. Which may cause major malfunction or even blow the engine. I looked up recalls for my vehicle and there are none but GMC issued a recall on other vehicles for this same issue. How do I get help here?.

The vehicles engine siezed at 6,400 miles leaving us stranded on the side of the freeway for 3 hours and GMC is trying to pin the blame elsewhere. Car has been in the shop for 3 weeks and they are unsure if it will be covered by warranty. The only thing done to the car was an oil change performed at a GMC dealer.

While driving the engine cut out. I wasn't able to get the vehicle off the road and had to put in an acceleration lane until I could get a tow. Other drivers entering the roadway were accelerating and some didn't realize that my road hazard lights were on and almost hit me. The vehicle was given a diagnostic check by a service station and say that the fuel pump power control module is not working. After checking the internet I found a recall for this item on other GMC models but not the Acadia. There was no advance warning for the malfunction.

I have had nothing but issues with this vehicle from the day I purchased it. I should have been more leery of purchasing a vehicle with so few miles on it as a certified vehicle. First issue lift gate wouldn’t work. Had to have sensors replaced twice. Next was the purge valve sensor that has went bad 3 separate times. Then the crankcase vent sensor. Paid a fee for diagnostics, it was not repaired took it back when the engine light came back on, they replaced it without charging but I was advised it’s not covered under warranty. And most recently my check engine light came on yet again today now reading an issue with the engine cooling system. Unfortunately the dealer is so booked out, my only option is to drop it off and hope they can get it in by a cancellation or no show. Seems there are new issues ever 3-6 months with the car.

The contact owns a 2018 GMC Acadia. The contact stated that while driving at 60 mph, the reduce engine power message was displayed. The rpm increased to high, and the engine revved. The accelerator pedal was depressed, but the vehicle failed to respond as needed. The contact stated that the failure was related to NHTSA campaign number: 18v358000 (fuel system, gasoline). The vehicle was taken to the local dealer, where it was determined that the high-pressure fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 98,000.

See all problems of the 2018 GMC Acadia 🔎.

While car is in park, I get the "shift to park" warning after driving the vehicle.

Shift to park. Vehicle does not turn off when in park. This recall is in effect on other 2017 Acadias but for some reason ours is not under the recall. Had this issue in 2020 and it was repaired at our cost. It is now doing the same thing.

Sold 2018 GMC Acadia by lee GMC in auburn. Acadias shift to park was defective, dealership replaced before sale did not disclose, shift to park and transmission malfunctions occurred. I returned Acadia to the dealership several times and they would never properly fix or address my concerns now my vehicle is unsafe to drive. I have documentation to support the claims in my letter, I can send as well if you’d like. Thank you will send attachment.

My vehicle is 3 months old with 4650 miles. I was driving on the turnpike and without notice a warning on the dash advised that there was no oil pressure and to pull over. I had the vehicle towed to a dealer out of state since we were 3 hours from home. The dealer called today to advised the car needed a new engine. I asked what was the route cause and they advise the gm did not require the engine to be stripped to find one.

I have a 2018 GMC Acadia that is now displaying " shift to park " while the vehicle is in park. Upon extensive research I see GMC did issue a recall however, my particular VIN was not included. Its now displaying the error message which would lead me to believe it is part of the recall. I called my local GMC dealership (langhorne, PA. ) and they said this was not covered since my VIN was not issues a recall.

Truck lost power randomly while driving on freeway spend so much money on fixing it this has to do something with the way the built it.

On about 01/20/2025 my transmission? auto started to shudder before going into 3rd gear threw 5th. Once in 6th gear at about 55 the auto starts to shudder and turns into a rumble feeling. My auto only has 100650 for miles on it. It has been serviced and have brought it to gm 01/24/25 to ask about it? after talking to service adviser. It would cost me 75. 00 for someone to go with me to confirm it is doing it. Then make an appointment for further evaluation. No price given at this time. But did not on paper! say that it is most likely torque converter causing the problem? confirmed it is not under warranty and there was nothing gm could do. I have been to at least 3 other shops in my area and they all say the same thing and price. Which is between 6 to 7 thousand dollars to replace the transmission. They all dosay that when it goes it could make me loose control due to lockup.

See all problems of the 2016 GMC Acadia 🔎.

Oil is burning through. I have to get an oil change once a month or it goes completely empty. Spoke to multiple macanics now and all tell me that's a defect with the 2017 arcadia. I just bought this in August. I love it and don't want to get rid of it. Please fix this. I can't keep burning through oil like this. It's not safe for my kids and I.