2018 GMC YUKON XL Engine Problems

We have a 2018 Yukon with a 6.2. It has 70,000 miles on it. We have taken very good care of it and changed the mobil oil less than 5,000 mile intervals. The engine is making a terrible knocking noise. We stopped driving it the minute it started. We put it on a trailer and pulled it home and it has not been started since then. We had no warning lamps or messages to alert us of an issue. We have not had it to a dealership yet to have it inspected as we are pretty sure it is the same issue that other 6.2 engine vehicles are having. This vehicle has been well maintained. We are hoping that this year/make/model will be included in the recall for a new engine as that is what ours will be needing. It is very disheartening that you spend that much money on a brand-new vehicle, and it does not have very many miles on it and the engine fails.

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The engine (6.2L L87 V8) failed completely. The engine experienced knocking and rattling noises prior to the failure and then stopped functioning altogether while driving. The engine was replaced by Village Auto in Bellmore, and the failed engine is no longer available for inspection, as it was removed and replaced during the repair process. 2. How was your safety or the safety of others put at risk? The engine failure occurred while the vehicle was in motion, creating a dangerous situation where the vehicle suddenly started shaking and could not be driven. This posed a serious safety risk to me, my passengers, and other drivers on the road due to the loss of engine power, steering, and acceleration control in traffic conditions. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue was confirmed by an independent service center, Village Auto in Bellmore, which diagnosed the engine as irreparably damaged and requiring a full replacement. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle was not inspected by General Motors, police, or insurance representatives. Insurance would not cover this issue and General Motors failed to take responsibility for a fault in the engine. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No - all happened at once - engine light and complete failure

Took the car to the dealer after getting alert from my GMC app saying it needed emission serviced, engine light came on, antilock brakes needing serviced. The dealership said that the engine is blown at just over 71200 miles. This car has only had service done at the dealership except for a tire change.

The contact owns a 2018 GMC Yukon XL. The contact stated while driving 50 MPH, the check engine warning light was flashing. Additionally, there was an abnormally loud sound coming from underneath the hood, and the hood was shaking. The contact was able to drive to the residence. The vehicle was towed to Village Auto, where it was diagnosed and determined that the engine had failed and needed to be replaced. The vehicle was repaired. Village Auto contacted an unknown dealer. The contact later became aware of NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling), which the contact related to the failure. The manufacturer was notified of the failure and informed the contact that the repair could not be covered because the VIN was not included in a recall and due to the mileage on the vehicle. The failure mileage was approximately 60,000.

Mileage: 60,000

2018 Yukon Denali engine failed June 2024 due to the lifter being bent. The dealership Richey Cadillac in Daytona Beach estimated the repairs at $18,862 and were going to have my vehicle for months. I took it to my mechanic who rebuilt the engine for $7181 in 30 days. My safety was placed at risk because while driving I had to pull over since I had no control with the engine failure. There were no messages prior to the failure.

The contact owns a 2018 GMC Yukon XL. The contact stated while driving at an undisclosed speed, the vehicle stalled with no warning light illuminated. The vehicle was able to restart. The vehicle was taken to an independent mechanic where it was diagnosed with engine failure and the contact was informed that the engine needed to be replaced. The vehicle was not repaired. The vehicle was towed to the dealer where the same diagnostic result was provided to the contact. The contact was informed that the engine needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was not made aware of the failure. The approximate failure mileage was 70,000.

Mileage: 70,000

2018 Yukon XL: Safety of family put at risk over faulty transmission. Vehicle used to transport children many times daily. Transmission began slipping with slight lagging. Vehicle assessed by independent service center and we as customers told this is a common issue with GMC vehicles of this year. Service center was able to reproduce and confirm the issue. Total to rebuild entire transmission was $7,377.33. Total transmission failure. Entire transmission had to be replaced at tremendous expense to our family. Transmission began slipping with slight lagging. Engine RPM's would increase with no additional power or speed.

I heard tapping coming from the engine while it was running. Once I took it to a shop it was determined that the lifters and the camshaft was damaged and needed to be replaced.

Engine Valve Lifter for cylinder 3 had failed and Camshaft lobes damaged. Error codes of P0300 and P0303. Vehicle had 67,049 miles when I brought it in to be repaired at Park GMC in Greenville, SC on 12/28/2022. GMC has the lifters (they replaced all 8) and the camshaft. Failure happened while on I40 in the Smokey mountains at night while driving back from Dollywood with my family. Engine produced a gassey sputtering sound and I lost some power but only noticeable under acceleration. Had another lifter failed due to the worn camshaft lobes, we could have easily been rear ended. A year prior to the failure (September 2021), I had taken the vehicle to a Wakefield Buick GMC and Parks Buick GMC to be inspected due to a shake at idle. Both dealerships said there were no codes and they didn't know what was wrong but they could feel the shake/vibration intermittently at idle. In November of 2022, I got the P0303 error code and took this vehicle to a private mechanic (since dealerships previously said nothing was wrong) who diagnosed an issue with the fuel injector for cylinder 3. I had mechanic replace all 8 injectors and he cleared the code. About 150 miles later (while on I40), the code came back. I took this vehicle back to the private mechanic and after several weeks with my vehicle, he refunded me the labor and said it was probably an issue with the lifter but he didn't have time to take apart the engine. I then took this vehicle to Parks GMC in Greenville, SC where they diagnosed a lifter and camshaft failure. Lifters and camshafts should not be failing in vehicles with under 100k miles.

The engine started making a ticking sound a few days after thanksgiving. I made an appointment with the dealership but they couldn’t take it in for 3 weeks. The day before my appointment I was driving on the highway and the lifter broke which caused the camshaft and a few other parts to break causing sudden lose of power and severe shaking. The parts for the repair were back ordered and it took about 5 weeks to get my vehicle back. About 7 weeks later I started the car in the driveway and it again had lose of power and severe shaking. The parts that were replaced in January failed and ruined the whole engine. There is a 6 month back order on this engine. It has been sitting at the dealership for almost 2 months already. Both incidents I believe had the potential to cause an accident if I were driving with cars close behind me.

The torque converter is too small for the vehicles transmission which then caused it to break and put metal into the transmission fluid. Which cause the transmission to break. My safety was at risk was because while on highway it shot high on RPMs and then made funny noise and wouldn’t go. The problem was confirmed at Aamco transmission where I have to get the transmission rebuilt. There was never a check engine light or check fluid or any codes Thrown before the problem.