2025 Chevrolet Suburban owner complaints

Cause unknown, however, I have discovered that the engine in my Suburban, the Engine code LZO 3.0L Duramax, has damaged itself internally. I have been told that there is a large batch of engines that have this same problem, and the dealership I sent my car to has several cars in the same position. This problem is causing the engine to lock up or completely quit. This could be serious depending on when this failure happens. Currently, they are telling me that I am months away from getting a new engine due to a back order. Vehicle still in shop, so I do not have records yet, but I will be happy to give them once I have them.

The engine in 2025 Suburban (6.2L V8) has failed and the car is not drivable. It is currently in a Chevy dealership service department waiting for parts. The 2025 model is not listed under the recall. However it should be, I know of 3 2025 engines that have recently failed. I was passing a vehicle and as I took my foot off the accelerator the transmission shifted 2 times and then the engine shut off and the car was coasting. We had no indication that the engine shut off, just several messages on the screen. ( Press start button, and conditions not correct for shifting.)

3.0 Duramax engine failure at 5900 miles. Apparently is from the known thrust bearing issue. MIL, CEL, TCM illuminated. Failure occurred at 60 mph during rush hour traffic. Engine is being replaced under warranty. GM should issue recall for the affected lot of this engine.

3.0 Duramax, thrust bearing engine failure. Less than 6000 miles on vehicle. Driving at 60 mph when vehicle went into major limp mode. Had TCM, Charging and coolant lights illuminate. GM is replacing engine under warranty. Indicated there was approximately a 2 week engine production window where this issue is being traced back to. GM should issue recall if they know the extent of condition and the cause(s).

The contact owns a 2025 Chevrolet Suburban. The contact stated that while driving 25 MPH, a yellow triangle warning icon was displayed, and a message to "Please Add Oil" was displayed. The vehicle was taken to a dealer, where it was diagnosed with a broken part and oil was leaking oil onto the oil filter. The vehicle was repaired. The contact stated that approximately 1,000 miles later, the same triangle icon was displayed and with the same message displayed while driving. The vehicle was taken to the same dealer, where it was diagnosed that the oil needed to be changed. The vehicle was repaired. The contact stated that approximately 1,000 miles later; while driving at an undisclosed speed, the same triangle warning icon and the message were displayed with the check engine warning light il

Driving on Highway at approx 70mph, lost propulsion and speedometer went to 0. Came back after approx. 5 seconds. After exiting highway and stopping, clear knocking/clanging noise from engine. GM states full engine replacement needed. This is a 2025 6.2 V8, thought these issues were fixed?

We have 8,625 miles on our 2025 Suburban. We were going down the highway when began to hear a unfamiliar noise. We pulled over into an error to inspect and didn't notice anything under the vehicle, which we thought might have cause the noise. We put into drive and went less than an 1/8 of a mile and our suburban lost acceleration and stopped. It would not start and couldn't not be moved, until roadside assistance took it to a Chevrolet dealership. The dealer stated the engine seized up and needs to be replaced. We were fortunate we were not going any more than 20 miles per hour and were not on a major highway.

7/13/25: Car repeatedly jerking/shuddering/rough ride. A flashing check engine light came on for 10 or 15 minutes. After stopping car and restarting it, the check engine light went off. 9/15/25: Car jerking and another flashing check engine light. Took to dealership. They drove it and said no codes stored. Told it was probably the transmission "breaking in." Took home. Car continued to jerk/stumble. 8/28/25 to 9/15/25: Car jerking and flashing check engine light back on. Took to Autozone. A Random/Multiple Cylinder Misfire Code was detected (P0300). Took to dealership and confirmed P0300 Code stored. GM TAC engineers involved. Told they were unable to figure out why car was having multiple misfires. Returned car to me because no active code/light. 9/29/25: Car jerking and fl

Purchased the vehicle on April 7, 2025. On 7/15/25, the car had 6948 mi. and started running rough, had a loss of power, an odor from the engine, and then on the display: check engine, blinking green vehicle light, and a message stating that the car was lowering for stability control. Took the vehicle to the closest Chevrolet service. The service dept. determined that code found P0307 and P0300, cylinder seven had the most misfires above 500. After completing oil service, the vehicle began to click on the passenger side; however, it was not misfiring. They inspected and found potential lifter issue. Found ticking coming from cylinder 7 and verified misfires. Found 2 pushrods damaged. Heard noise coming from cylinder 4, removed valve cover, removed rocker arms, and found 1 pushrod da

2025 CHEVROLET SUBURBAN HIGH COUNTRY. Vehicle is parked in my garage. Went out in the AM and the engine only cranks, will not start. Called On Star for roadside assistance. Sent a tow truck, the vehicle could not be towed due to the electronic transmission. There is no way for an owner to place the transmission in neutral. Vehicle is stuck in my garage. GM customer service referred me back to roadside assistance who for the second time stated that they could not help me. This is a serious issue. The fact that the transmission can NOT be shifted into neutral unless the engine is running is a very serious safety concern.Called GM helpline a second time. They said that I should call for a tow on my own. Waiting for the selling dealer to call me back. Vehicle is currently stuck in m

Purchased a brand new vehicle on 23Dec2025 (evening) and then drove it home and parked it in my garage. Vehicle was in my garage at 64 miles on the odometer. Vehicle started smoking and the transmission cooler line had the catastrophic failure spilling oil all over the street, driveway, and garage. It was towed from my garage to the selling dealer (Walser Polar Chevrolet in White Bear Lake, MN) on 24Dec2025. Service center confirmed a manufacturing defect in the transmission cooler line from the factory.

Heat blowing cold for all passengers and defrost fails to clear windshield as stated in FMVSS-103. After reviewing forums it seems that this is a known issue/common failure.

Car was parked (in covered area) when back window shattered sometime after 12pm. Car had not been driven in two days and outdoor temperature started at 62 that morning so there were not extreme temperature changes as at the time the window shattered, it was approximately 75 degrees. No apparent reason for breakage as we live in a secluded area and were nearby outside enjoying the day.

My Onstar system is not working properly. I first noticed the Forward Collision light then the Wifi hotspot features not working. Reached out to onstar they couldn’t help then referred to dealership. Visited dealership 8/12/2025 was told there’s no error code although they see what’s happening. Doing further investigation of my own i found out this is a very well known issue amongst General Motors, Onstar and the dealerships selling these vehicles. There are varying issues customers are having from wifi not working to vehicles completely shutting down in traffic. Once my visit to the dealership commenced i was informed the Telematic Control Module” is on back order with no estimate on deliveries as there’s “others waiting also” this is a scary situation. I am worried that my issue is going

The contact owns a 2025 Chevrolet Suburban. The contact stated that the "Adaptive Cruise Control Temporarily Unavailable" message was displayed on the instrument panel. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was advised that the radar was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 23,686.

Main display, driver display, and HUD froze while driving. Speedometer froze as well. Main display goes back while the driver display freezes. NO blinkers worked. This happened 3x throughout the day. Only way to reset is unhooking the battery.

OnStar Module factory defaults/Malfunctioning - Power button don’t turn on so there’s no internet connection. This effect all the safety features in the car. Please recall. There has been numerous incidents reported online to this particular default.

The brake system had a failure and the vehicle could not be slowed down. The brakes would come and go until I was able to stop. GM dealership diagnosed it with a failed master cylinder and the part is on national back order.

New vehicle purchase, the Dealer had installed a 3rd brake light that blinks 4 to 5 times when pressed. I'm concerned because according to what I've read a blinking brake light is against federal and state regulations.