2018 GMC Yukon owner complaints

I own a 2018 GMC Yukon Denali that keeps burning oil. I was told that the light had to be on or the issue had to be duplicated. I did an oil change and 2000 miles later the oil light came on. I was out of town so took picture of dipstick which was bone dry. The dealership GMC of Brandywine had my SUV. I am highly upset because in other states the started a lawsuit bit nothing in MD. If GM knows this is an issue then why aren't they doing something. My SUV has been down since October 16 and no ETA for the part. No loaner or rental help from GM as well.

What component or system failed or malfunctioned, and is it available for inspection upon request? Engine failure due to lifter failure and bent push rod and needed cam replaced. It is available for inspection. How was your safety or the safety of others put at risk? Could have been catastrophic if I didn't bring in for repair if the engine failed completely while driving. Has the problem been reproduced or confirmed by a dealer or independent service center? YES Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes, May 10th.

2018 Yukon Denali with 37,000 miles has developed a leak in the radiator and needs replaced

I was driving on I75 North, just North of Chattanooga. I was in the Center Lane. I lost all power to the vehicle. The engine stopped. I had no power steering, no power brakes, and was in heavy traffic. I managed to shift lanes and get it to the shoulder of the road. The vehicle was towed in. Diaganostics were completed by a certified mechanic. The engine had seized. GM has several recalls on this issue. 2018 is not included. However, this is the exact same issue that is happening with 2019 and up. That were recalled. I urge you to order an extended recall to include 2018 vehicles as well before someone gets killed.

My 2018 GMC Yukon blew an engine with only 81,000 miles. Had four shops including (2 GM dealerships) look at the vehicle, pictures, and findings and concluded the engine had blown. The vehicle had began running very rough while driving down the road at 45mph. The CEL showed a misfire in cylinder one. The spark plug was pulled and soaked in oil. A borescope was put down the hole and found oil pooled on top of the piston. The engine has blow by the piston rings and the cylinder wall was scorn. Four shops. Four results. New engine needed. A quick google search of the engine (L83) showed multiple open class action lawsuits for this exact situation. The cause of the problem is the active fuel management system that GM created. When I contacted GM for assistance at the recommendation of the de

driving the vehicle on a regular city street when the flashing engine light came on out of nowhere. immediately pulled off and had the vehicle towed to my dealership. result of the inspection, i have to replace my engine. as soon as i started researching the issue it is clear that this truck should be part of the GM recall. it is a known issue that GM slow played for years, but as of now this vehicle is not part of the recall. it is the same engine and failure mode as the 600,000 unit recall, but mine isn't covered by the recall leaving me responsible for their known and documented manufacturing issues

Air conditioning system does not cool the air.

Tl* the contact owns a 2018 GMC yukon. The contact received notification of NHTSA campaign number: 19v761000 (electronic stability control, service brakes, hydraulic). The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the issue and stated that the part was not available. The manufacturer provided case number: [xxx]. The contact had not experienced a failure. VIN tool confirms parts not available. *dl parts of this document have been redacted to protect personally identifiable information pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Tl* the contact owns a 2018 GMC yukon. On several occasions, while driving various speeds, the forward collision avoidance system and lane departure function became inoperable. The vehicle was taken to gerry lane Buick GMC (6615 florida blvd, baton rouge, la 70806, (225) 341-5413) where it was diagnosed that the module for the forward collision avoidance system and lane departure assist module were faulty. The vehicle was not repaired. The manufacturer was not contacted. The approximate failure mileage was 30,800.

All back light won’t turn on only brake lights but not night time running lights

When running from time to time, the service stabilitrak message appears and the ABS light momentarily appears and disappears, and the agent was detected, but the defect was not discovered, and in the detection of my friend's device, code c0800 appeared, but the agent refused to look for the defect in the code when I explained it to them, and I still wait when it will come back and worry

The contact owns a 2018 GMC Yukon. The contact stated after the vehicle was serviced, while driving 30 MPH and depressing accelerator pedal, the vehicle failed to respond. The contact stated that the vehicle hesitated, and the contact shifted to a lower gear to drive to the residence safely. A dealer was contacted. The vehicle was towed to the dealer where it was diagnosed and determined that the transmission needed to be replaced, and that the engine block was damaged. The transmission and engine block were replaced, and the vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 104,000.

I was driving my vehicle and exiting the hw. The rear wheel of the driver side broke off and separated from the car which caused my car to hit the cement beerier on front and the side of the driver side of the vehicle. Then the car turned 180 degrees and hit the beerier on the passenger side and the rear of the car. The air bags never deployed and we discovered that the wheel brook off of the rear axe. No damage to the wheel. Several industry exports stated that this should never happen.

I am writing as a concerned owner of a 2018 GMC Yukon Denali, which I purchased in 2018. Over the past six years, I have encountered multiple critical issues with the vehicle, specifically with the transmission and motor mounts. These issues have been both recurring and costly to address, raising concerns over the reliability and safety of the vehicle. Recently, I experienced a complete transmission failure that required a full replacement, which was both unexpected and financially burdensome. Additionally, I have had to replace two motor mounts, further highlighting what appears to be a design or manufacturing flaw affecting multiple components within the vehicle. These problems are not isolated incidents, as I have come across numerous accounts from other GMC customers facing similar cha

Dealership did a tune-up in June 2025 and had my truck for 2 weeks, no issues with transmission discovered or discussed. Now in September 2025, 2018 GMC Yukon has developed a torque converter shutter when driving between 40 and 50 mph. I took the vehicle to an independent shop who told me they had some computer tool to manually control the transmission, and there is an internal failure. There was a transmission flush completed hoping to gain results, however it was very short lived.

The front shock absorbers on my 2018 yukon denali are leaking. The car is 2 years old with approximately 67k miles. GMC has the absorbers on back order as they are apparently being replaced frequently. I think the shock absorbers have design faults that assure they will need replacing well before the normal life of the product and therefore should be recalled and replaced with a better product. I contacted GMC customer care and they offered to replace them for $1,450 plus tax which is not an adequate solution - they should replace them for free.

Air conditioner condenser faulty and had to repaired. Premium Ride Shocks faulty and had to be repaired. Lifters and bent pushrod faulty and had to be repaired. Vehicle currently has approximately 70,000 miles. These are all known issues by GM and very expensive to fix and no recalls.

I have noticed the amount of pressure needed to apply brakes at a slow speed is a lot to where it seems like I will crash into the car or object in the way of my vehicle. I took my vehicle to a GMC dealership and was told the brake vacuum pump needs to be replaced. These vacuum pumps were already recalled by NHTSA. NHTSA #19V645000, GM #N192268490. This recall was expanded to include additional vehicles. NHTSA #20V603, GM #N202300860. I strongly believe my vehicle needs to be included in this recall. GMC repair invoice is attached.

Numerous tires have had sidewall failure. We have had two tires withing 8 months (7000 miles).