2015 CHEVROLET SUBURBAN Complaints

When driving through city traffic basically stop and go the brake pedal gets very hard and the car does not stop as smooth or almost not at all. It gets very dangerous.

Continuous "Trailer Brake System" alarm makes the vehicle undrivable due to to distraction

Clanking, stalling , wouldn’t go into gear. Had to have the truck flatbed to AAMCO. Was told transmission. Call Chevy during issue’s and told vehicle was not part of recall. Transmission had to be replaced.

TRANSMISSION GAVE OUT WHILE DRIVING ON HIGHWAY YES NO LIGHTS TILL IT JUST STOPPED IN HIGHWAY

The contact owns a 2015 Chevrolet Suburban. The contact stated that while the vehicle was parked and turned off without the key in the ignition, her daughter bumped into the gear shift selector and inadvertently shifted the vehicle into reverse. As a result, the vehicle began to roll, coming to a complete stop after colliding with another parked vehicle. The air bags did not deploy. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was not repaired. A police report was not filed, and injuries were reported. The contact reported bruising sustained while attempting to stop the vehicle but had not sought medical treatment. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA hotline for assistance. The failure mileage was unknown.

The contact owns a 2015 Chevrolet Suburban. The contact stated while driving approximately 35 MPH and attempting to make a left or right turn, the vehicle lost motive power. The contact stated that the failure was intermittent but has been recurred more frequently at slow speeds. The vehicle was not able to be restarted. The vehicle was towed to a local dealer however, no failure was found. The contact stated that the failure reoccurred, and the local dealer was not able to duplicate the failure. The local dealer suggested that the battery needed to be replaced. The battery was replaced; however, the failure persisted. The vehicle was taken to an independent mechanic and remained with the independent mechanic. The vehicle was not repaired. The contact related the failure with the NHTSA Manufacturer Communication Number: N212333901 (Loss of Power Steering Assist). The manufacturer was not made aware of the failure. The failure mileage was approximately 150,000.

The # 7 cylinder valve lifter in the 2015 Suburban engine fails when accelerating in certain situations. This has happened to this vehicle twice at and expense of rebuilding the engine. The in both cases the vehicle was accelerating into fast moving traffic. When the lifter fails the engine loses power and no longer accelerates which requires swerving out of traffic, back to the shoulder to not get rear-ended by on-coming traffic. The problem was confirmed and the service provided indicated that this was a significant issue with this particular engine. Basically, it happens to many of these vehicles. The engine has been rebuilt twice while I have owned it. When the lifter fails the check engine light comes on. These failures occurred on September 24, 2021 and again on September 9, 2023.

Vehicle lost power steering turning a tight left into a parking space at a low speed on 5/18/2024. A second later, the engine and all electrical in the vehicle went dead. The steering locked and nothing electrical in the vehicle was functional. Based on the online information and comments found, this is a significant problem with the 2015 Suburban. The GMC recall number is 14743. The recall was for replacement of the power steering assist motor kit. When I look up my vehicle on the recall listing there are no recalls for my vehicle. There is an obvious problem which is effecting these vehicles and dealers shouldn't question the safety implications of steering and engine failure while the vehicle is moving.

In 2022, the transmission experienced a complete failure and required replacement. Unfortunately, the vehicle is now encountering the same issues once more. From various forums, it appears that these issues are prevalent with the 2015 Suburban, including the need for AC condenser replacements. Having had to address both problems, it's clear these repairs are quite expensive for a family vehicle, especially considering regular maintenance.

The transmission has failed several times during driving with no check engine light or maintenance required light appearing. I get monthly reports saying that the engine does not have any problems. My safety and others safety were put at risk because any time during driving the engine can lose power and you will no longer be able to accelerate. This could be dangerous on roads and especially highways if you are traveling at fast speeds and cannot get out the way of others possibly causing an accident. I have recently taken my vehicle to a car mechanic shop and they say this is a common issue in the transmission of similar makes and models around this year. There were no previous warning lamps or messages from the vehicle or the monthly diagnostic reports I receive monthly. The problem started occurring before 150,000 miles.