general problems of the 2021 GMC Acadia

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.

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.

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.

While driving vehicle stalled multiple times in the middle of the road, with service transmission and engine light coming on, causing unsafe conditions, causing accident and leaving passengers stranded. Battery being drained and needing to be replaced multiple times within 2 years. Vehicle stopping and shutting off on the highway causing dangerous driving conditions!! radio and lights flickering, with radio freezing and shutting off. Electrical system not working properly and overheating!.

Vehicle stalled out and instrument panel showed no gas when the tank was over half full. I had trouble re-starting but was able to only drive a mile before stalling again. Both times occurred at a stoplight I had it towed to local dealer . They replaced the fuel pump power control module. The service personnel said that they see a large number of these and that some people had accidents due to this. I was about to enter a very busy highway at rush hour and if this happened on the highway, it would be very dangerous. I saw that there were previous recalls on GMC/chevy vehicles similar to mine from 2021 that had recalls for this same reason but the Acadia has not been included. From what I have seen, a recall should be considered.

Engine exhaust makes vibrating noise similar to a leaf blower under acceleration. TSB issued due to common issue and gm refuses to recall or fix. Broken baffle/weld inside of front muffler/resonator on exhaust system under front passenger compartment. Issue getting worse. $2500 at local dealership to fix, with gm offering “assistance” to fix issue in the amount of $742 leaving the consumer with balance. At what point will the rest of the defective part deteriorate and cause clogging issues and more damage?.

The vehicle, without any warning, suddenly stopped. I was unable to restart and unable to put the vehicle in neutral for pushing to a safer location. Had to be towed to the dealership.

The car stopped working all of a sudden, I was driving the car with no issues that morning and parked & shut off car to go to my appt. I turned the car back on and worked fine as I was putting in my address on the gps my car just stopped and shut off by itself. I pushed the start button and it sounded like it wanted to start but it wouldn't and the whole engine shooked. Called gm and car still under warranty had it towed to the nearest gm. They diagnosed it and said it was the fuel injector module that went bad. It's 2021 with only 23800 miles. After a week, just got it back for a day and now the cooling fan has a loud noise, check engine light on, coolant stays on c even after driving it more than 10 mins, ac blows hot air, I get an alert with steering assist is reduced and to drive with care. . . . . Seems like something is wrong with the thermostat.

The contact owns a 2021 GMC Acadia. The contact stated while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a fractured rear cap catalyst converter cap. The contact was informed that the catalyst converter needed to be replaced. The vehicle was not repaired. The contact stated that the original catalyst converter was replaced by the same dealer less than two years ago under warranty. In addition, the contact stated the front catalyst converter was replaced by the same dealer five weeks ago. 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 approximately 86,000.

May 2023 we took the car to the gm dealership for a electronic recall. We reported a rattling noise at that point in time. Whatever repair was done that the car ran w/o any noise for nearly a year. April 2024 the catalytic converter failed at just 61k miles on this vehicle. The mechanic at the same dealership noted a broken mounting bracket and replaced the catalytic converter. October 24 2024 at 76k miles the car started making the same noise. The mechanic at the same dealership noted a loose mounting bracket due to an excessively vibrating catalytic converter, a crack on the cat converter, a leak and sequentially damaged front pipe. They noted they made all of those repairs. They noted they test drove the vehicle and verified the car was repaired. October 26, 2024 after those final repairs the car made a loud revving noise and emitted a smell of sulfur. The next day the car died on the road while driving. Every system of he vehicle shut down and I narrowly avoided getting hit from behind. On 11/2/24 we had the car towed to the dealership again. The mechanic noted the recent replacement on the cat converter & oil had leaked intermixing. That caused the motor to seize and the car to stop working while I was on the road driving. I can't imagine what could've happened to me had it stop on the highway at 65mph.

I have a really loud buzz & rattle noise. I can feel vibration on the passenger floor board real bad. The loud noise usually around 2,000-2,500 rpms. I have 39,000 miles on my car. It has always made a noise at take off but we thought it was normal untill now it's extremely worst. I took it into the dealship they diagnosed as something broken inside the muffler / resonator / weld inside muffler. So I did my research on the internet and I see alot of people complaining about this same issue on there cars. There was even a bulletin number (pit5863) pulished on 11/2/2021 the correction review # (21-na-118) all my issues are identical to bulletin. My year,make,model and issues with my car.

Car had only 5000 miles . We live in denver took it to mountains for first time. We are both in our late 70 s . Going down mouintains vail pass car engine exploded car went into complete stop at highway speed. Lucky we did not die as car went off to berm on I 70 west. Milemarker 180 or so. GMC roadside called after 18 hours finally consented to tow car back to denver. We called 911 for fear of our life with trucks wheezing by. " GMC national" would not buy back car. My wife and I explained to GMC we were in a panic when this happened. Dealer auto nation found that pistons were blown up as well as engine. They offered to give us new ?rebuilt engine . . We refused as we are very frightened to be in this car. Dealership finally offered to buy car which we consented . GMC refuses to pay any of our trip interruptions expenses case no sr9-8150020854 April 1-866 790 5600 ext 5913625 pistons confrimed by auto nation west golden CO to be defective and sponateously broken pistons there was defect in production of pistons no safety warning that car engine exploded car just completely stopped suddenly.

I got into an accident because my back up crap camera did not warn me that a car had turned behind me. Also when and backing up and a car is coming it doesn’t indicate the car is coming until it’s behind me. I’ve taken it to the dealer and they say there’s nothing wrong with it. Also there is no break when you come too close to something in front of you.

The contact owns a 2021 GMC Acadia. The contact stated while stopped at a stop light and depressing the brake pedal, the engine revved up with the rpm’s increasing up to 15,000. No warning lights were illuminated. The contact stated that the vehicle jerked and vibrated as the transmission did a hard shift. The vehicle was taken to the dealer who took the vehicle on a 24-minute test drive and no failure was found. The vehicle was taken to the dealer several times and no failure was able to be determined. The failure occurred several times. The manufacturer was notified of the failure however, no assistance was offered. The approximate failure mileage was 249.

This is a well known issue. On the dash it keeps reading steering system is being reduced drive with care. I have been dealing with this issue almost years. Been to the dealership too many times for this issue.