2025 GMC Yukon

The contact owns a 2025 GMC Yukon. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights illuminated. The vehicle was towed to a dealer, where it was diagnosed that the engine, radiator, and an unknown belt needed to be replaced. The vehicle was repaired; however, the failure recurred. While driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized upon arriving at the dealer location. The vehicle failed to restart. The dealer diagnosed that the generator and air conditioner failed and needed to be replaced. The vehicle was in the process of being repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 33,018.

GM performed a vehicle wide Over the Air reprogramming of the modules incorporated in the VIP/Global B electronics platform in April, 2026. Following that my vehicle became totally dead. Key fob would not unlock the vehicle. Had to use the metal key, open the drivers door. Opened the door, nothing moved. No lights, no movement from anything on the vehicle. Opened the hood, charged the battery and tried to crank it. Would not budge. Starter would not engage. Disconnected the negative battery cable. Tried again. Still would not budge. After an hour of so of trying and using jumper cables from our other vehicle, still would not budge. I disconnected the negative battery cable from the right front fender ground and reattached it. It then cranked. Drove the vehicle 30 miles at interstate speed. 8 miles in city traffic. Drove home and parked it in the garage. Drove it abput 10-12 days later to get breakfast. Parked it, locked it with the key fob. Came back after getting food, key fob would not work. Opened it with the button on the door handle. Got In tried to crank it. Would not budge. Disconnected the negative battery cable twice, before it cranked, but would not drive. Message in dash said vehicle could not be driven. Finally got it cranked. GM never advised that the battery must have a 70% charge at all times for the electronics to work. Owner's manual contains no such statement. Vehicle is defective to the extent that it will leave me stranded in wherever the battery power is less than 70%. Dangerous to get stranded at night on a lonely road or highway, away from cities with tow trucks and competent service personnel. Vehicle in shop 32 days before dealer advised resolution. Modules bricked requiring engine control module and telematics module replacement.

Engine failure while driving at 60mph that started with a loud knocking sound to eventual engine failure where it wouldnt turn over. Vehicle has 9600 miles and has had issues since day one of leaving lot requiring fuel injector, intake manifold gasket, lifter and rod with last fix being new coil and spark plug that supposedly fixed issue. The most recent engine failure put my family and kids in danager given 100 degree weather in middle of desert on a small highway with very limited cell service. Vehicle provided no warning lights. Vehicle was towed to dealership and I have not received an update. Vehicle has not been inspected by polive or insurance or others.

Purchased new August 29, 2025 On 12/3/25- Mileage 4495. Took vehicle in for first maintenance service. Tire rotation and oil change. On 1/7/26- Reported grinding noise we had began noticing when starting vehicle. Engine light Service ESC. Service Traction control. Reported to Ben Mynatt GM. On 1/8/26 Mileage 7120- Took Yukon in for service due to grinding noise. Due for 6 module updates and 3 stand alone updates. On 2/16/26 Noticed ticking noise when heat in on high. Scheduled service for 2/26. On 2/24/26 Smell from car, oil reporting low. Dip stick completely dry. Sent email and photos to Ben Mynatt Service. On 2/26/26 Took vehicle in for service. Service advised to start oil consumption test. Ordered blower motor for the squealing noise. Cyl 3 misfire. Was told by the dealer, possibly needs engine 2/27/26 Took Vehicle in for service Check engine light on. Bearing inside blower motor and blower motor replaced. Replaced coil cyl 3 Tire Rotation 2/28/26 Car shaking, smoking, engine light on. Terrible smell from exhaust. Engine light came on, Service ESC, Service Traction Control, Forward Collision Unavailable, Reduced Acceleration Drive with Care Alert. GMC Alert: Service the engine and transmission system immediately alert, Engine Light on. Vehicle Approx miles. Codes misfires to cylinder 3. Took vehicle right to Service Dept. Codes Cleared. Replaced coil on cyl 3 March 7th - Mileage 11,200 Car shaking vigorously! Engine light flashing. Loud knocking coming from vehicle. GMC alert: Service the engine and transmission system immediately alert. Emission system- service now. Engine and Transmission System Service now. Service antilock braking, Stabilitrack stability control systems and airbag system. Service Air Bag System. Emailed to Service March 9th. Took vehicle in. Cylinder 3 & 8 misfire code cold start rough idle code. Oil consumption using approx1 qt of oil/500 miles. Vehicle unsafe risk of engine seizure, fire risk and loss of acceleration is extreme danger

Vehicle went into limp mode while driving on the highway. Onstar said it was the transmission. Checked the oil and smoke was billowing out of the dip stick and there was no oil. None of the sensors indicated that there was low oil. After sitting and waiting for a tow truck rechecked the oil with the dipstick and there was oil in it. Now requires a new engine.