2025 Chevrolet Suburban 1500 Problems

Valve spring broke at approximately 5200 miles. Dealer replaced the head.

The contact owns a 2025 Chevrolet Suburban. The contact stated that while driving approximately 65 MPH, a banging noise was heard coming from the engine compartment, and the vehicle decelerated. In addition, several warning lights, including the check engine light and the anti-lock braking system light illuminated. The contact pulled over to the side of the road, turned off the vehicle, and had the vehicle towed to a dealer. The dealer diagnosed that the engine and radiator failed and needed to be replaced. The engine and radiator were replaced. Approximately 5 months and 6,000 miles later, the failure recurred and the engine began to run rough. The vehicle was returned to the dealer, where it was diagnosed that the engine failed again. The engine was in the process of being replaced. The manufacturer was notified of the failure and a case was filed. The failure mileage was approximately 17,000.

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 my garage and GM does not care.

My rear passenger door flys open while driving. It happens during very cold weather. It also will not latch when trying to shut it after getting off the road and trying to shut it. My daughter has been in the seat next to the door each time and it has happened multiple times. Betten Chevrolet has tried to fix it twice and it is currently in their shop. This is totally unsafe!

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 my garage and GM does not care.

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.

Engine failed going 70mph on highway at 2k miles. Display said acceleration no longer available and app said transmission code was needing to be checked however once taking to dealer I was told it was an oil sensor then told there was shredded metal in my engine and I needed a full engine replacement. My car was in the dealership for over 50 days. I was pregnant and with two small children in the car when engine failed at high speeds. After my car was returned to me the engine overheated and failed again. The dealer claimed GM sent them an engine with cut hoses. I was 9 months pregnant when this occurred also on the highway going 65mph. GM refused to buy back the vehicle 3 times.

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 flashing check engine light back on. Got a warning of "reduced acceleration and drive with care." Car lost power. I have video of this and contacted On Star with report generated and P0300 code. On 10/1/25 on way to dealer, car making audible ticking noise. I have video of this. Took to dealer, the ECM was replaced and oil changed because it was "very dark" (in vehicle with 4,600 miles). Car continued to jerk/stumble. Told by dealer that problem would have to get worse before diagnosis could be made. 10/31/25: Jerking and another flashing check engine light with "reduced acceleration drive with care warning." Turned car off and engine light off. On Star report P0300. Took to dealer. The dealership was given the videos of check engine lights/reduced acceleration warnings and ticking noise video. All show problem happening around 1,200 rpms. Told by dealer on 11/11/25 that GM rep said they will not pay dealer for any work because no active engine light/codes. Told to pick up car. Asked dealer today for reason in writing, but no response. Very concerned about vehicle safety when repeatedly going into limp mode and flashing check engine lights with GM offering no solution.

driving down i30 at 70MPH and the rear passenger window exploded on my 10 year old child.

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.

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.

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.

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.