general problems of the 2015 GMC Yukon - part 1

The contact owns a 2015 GMC Yukon xl. The contact stated that while driving 70 mph and exiting the highway, the brake pedal was depressed but the brake pedal was stiff and stuck, requiring that the transmission be shifted to neutral(n), and to stand on the brake pedal with both feet. The contact continuously pumped the brake pedal, but the vehicle slowly responded and almost crashed into other vehicles. There was no warning light illuminated. The contact's wife and daughter were also inside the vehicle during the failure and were frightened and concerned for their safety during the failure. The dealer was contacted and was provided a description of the failure over the phone. The dealer informed the contact that the vacuum pump and an unknown part had possibly failed. The contact was advised that the failure was possibly related to NHTSA campaign number: 19v645000 (service brakes, hydraulic); however, the VIN was not included in the recall, and there was no warranty coverage on the vehicle for the failure. Additionally, the check engine warning light was illuminated. The vehicle was not diagnosed or repaired due to the cost. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 143,000.

While driving back home from my trip the truck all a sudden made a squealing noise and the engine just stopped. I was on the high way . I was able to coast the vehicle off onto the exit ramp. The vehicle was towed home. The following day it was towed to the repair shop. The shop has confirmed engine failure. Will need to replace the engine . Still waiting for warranty approval.

The contact owns a 2015 GMC Yukon xl. The contact stated that when the vehicle was started, the vehicle started shaking with a tapping sound coming from the engine compartment. The contact stated that there were no warning lights illuminated. The contact stated that while driving at an undisclosed speed around the block, the failure persisted. The vehicle was parked at the residence. The vehicle was taken to a dealer, where it was diagnosed and determined that the lifters in the engine were loose, and the lifters and the right side of the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 100,000.

Noticed a tick sound. Sent to dealer. Lifter failed. Bent push rod. Took it in Nov 24th. Charged $7,100. Fixed all lifters and bent push rod. Was turning around in my driveway and vehicle just shut off. Took it back to same dealer in Jan 27th. Bad lifter. Same push rod. Still in shop. That’s two months and 2,000 miles and had same failure. That is absolutely ridiculous gm and I should be compensated for this. It has costed me $7100 dollars. They are fixing with a two year warranty but if the failures are so close together, who’s to say it won’t just keep happening. Not only is it a safety issue, it is hurting my finances. I drive this vehicle 2 miles to work at 25 mph, and religiously change the oil at 3,000 miles. It didn’t even get an oil change before it failed again. I am not happy and gm needs to be sued for this. I owe 20,000 on this truck and have spent 7,000 already, and it keeps failing. There needs to be a recall for this model year, and it needs to be a permanent fix. Gm knows the quality of this motor is horrible and they won’t do anything about it. It’s not safe. They can my truck for $20,000.

While driving my 2015 GMC Yukon denali on the highway, the vehicle suddenly began shaking and lost power. I immediately exited the highway for safety and had to “nurse” the vehicle about two miles at 10–15 mph to reach home. The vehicle would no longer run afterward. A mechanic later diagnosed a lifter and camshaft failure. This is a known and common issue with gm 5. 3l and 6. 2l engines that poses a serious safety risk when it occurs at highway speeds. No warning lights or prior symptoms were present before the failure. I did not report it to the dealer, but the vehicle had to be towed to a mechanic for diagnosis. The vehicle is available for inspection.

The contact owns a 2015 GMC Yukon denali. The contact stated that while driving 80 mph, the vehicle hesitated, and failed to accelerate as intended while depressing the accelerator pedal. In addition, there was an abnormal knocking sound coming from underneath the passenger’s side of the vehicle. The check engine warning light was illuminated. The contact arrived at the residence and used a personal diagnostic reader and retrieved information related to misfires in cylinder #2 and #4. The contact replaced the spark plugs and the ignition coils. The contact test drove the vehicle, and the check engine warning light later illuminated. The contact swapped the ignition coils; however, the failure persisted. The vehicle was taken to the dealer where it was diagnosed that active fuel management (afm) and dynamic fuel management (dfm) had failed and caused the lifters to fail. The vehicle was not repaired due to the cost. The vehicle remained at the dealer unrepaired. The manufacturer was made aware of the failure but offered no assistance. The failure mileage was approximately 96,000.

The active fuel management (afm) system malfunctioned causing not all engine cylinders to fire at critical times, thus causing a safety issue when the vehicle has insufficient power traveling at highway speed. The afm is intended to transition from 8 cylinder power to 4 cylinder power to save fuel. However it malfunctioned so that it couldn't transition back from 4 cylinder power. The malfunction occurred while driving at highway speed, approximately 70 mph and towing a trailer. There were no warning messages or other symptoms prior to the failure. This malfunction necessitated removal and replacement of the engine. A certified mechanic completed the repair work.

The contact owns a 2015 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull to the shoulder of the roadway, where the vehicle failed to restart. No warning lights were illuminated. The vehicle was towed to an independent mechanic, who diagnosed a failure with compression in cylinder 7, resulting in damages to the engine. The contact was informed that the engine needed to be replaced. The vehicle was repaired. After investigating the failure, the contact related the failure to NHTSA campaign number: 25v274000 (engine and engine cooling), but the VIN was not included. 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 100,000.

Driving down the expressway at 65mph, and the vehicle completely stops, almost causing a collision. After researching the problem at the GMC dealer, it appears that the entire engine has internally failed. Apparently it was a complete engine failure.

In December 2024 took my GMC Yukon xl to a mechanic. They replaced the lifter in the driver side of the engine. 2500 miles later it is back in the shop for the same side. Now there is a bent rod. One of the lifter/rod spots collapsed. The mechanic is in contact with the local GMC dealer to figure out what the next steps are. The recent symptoms had to have car towed back to fairly reliable bobs mechanic. Pictures were taken and sent to GMC. First time this happened I heard a tic in the engine and took it straight to the mechanic. Second time this happened. Engine light came on flashing, trackton light came on, lost power, there was a shimmy when slowing down and a shake at the stop. I will note the second time this happened below.

Started my 2015 Yukon xl, drove approximately 6 miles to get gas and was to head out onto the highway. After gassing up and starting engine it began to idle very rough with a shake going on and ticking noise. No previous signs of any issues. Slowly drove back to my house at 20 miles an hour and called mandal GMC dealership. They suggested having it towed to them for inspection. Upon inspection they said the afm/dod #1 exhaust lifter was bad and needed replaced. They replaced all of bank one lifters and said their was no damage to camshaft. Drove it that night after repairing it and everything seemed fine. They called the next morning and said when they started it up the ticking was back again. They then supposedly took off head cover and inspected the camshaft again and said it was damaged and I would need a new engine to the tune of $18,000. 00. I purchase it in 2021 from them use and paid $33,000. 00 and now still owe even more than the engine repair. I said it would cost more than the vehicle was worth and they had done $4,000. 00 of repair that didn’t even get the issue fixed. I am a senior on social security and can not afford to continue to pay 20,000. 00 for the loan and then another $18,000. 00 for a faulty engine design that caused the problem in the first place. May have to join the thousands of others in the class action to get gm to not put out such untrustworthy engineering. Now $37,000. 00 piece of yard sculpture !! the morning that it occurred was the first sign of flashing engine warning on dash.

While driving my check engine light came on. Engine was shaking and running awful. Smoke was coming from the tailpipe. Mechanic upon inspection informed me that a lifter had failed. Causing damage to the cylinder head. Also causing the fuel injectors to fail. The cylinder head had to be removed and sent to machine shop for repairs. Mechanic informed me that this is a very common failure for LS motors. Repair bill was $5300 for parts and labor.

With my child in the car, on a highway with no shoulder, I experienced lifter failure. It caused the vehicle shake and lose power with cars driving behind me at 55-60 mph with nowhere to pull over. The engine just stopped as I was finally able to make it to a driveway safely. Problem was identified by dealership and my engine had to be rebuilt. I purchased the car second hand 3 months prior with no warning or symptoms. The car was inspected at the dealership by the extended warranty company rep. The extended warranty only cover a portion of the cost. The collapsed lifter cause damage to the camshaft and bent rods. The car only had 107,000 miles. If I were not able to pull off before the engine stopped, my daughter and I could’ve easily got rear ended on a major state highway. The car was difficult to control due to the engine shaking the entire SUV.

The Yukon was driving normally and just lost power while driving 55mph on the highway. Then I got off the highway to pull over and check it out and the Yukon started shaking while running and in park. The truck would not drive over 30mph without shaking and what sounds like misfiring.

While traveling at highway speed, without warning, check engine light started flashing. Pulled off the highway at the next exit and vehicle died in the middle of the road. Towed vehicle to mechanic who inspected vehicle and found no compression (zero psi) on cylinder 1 indicating a major engine failure, rendering engine unrepairable and the vehicle worthless. Either cam, lifter, piston failure in cylinder 1 causing massive engine failure and making the engine unrepairable due to metal shavings in the engine. This is the l87 engine, 6. 2l v8 that has been plagued by problems by millions of gm owners. This car had been meticulously serviced and maintained with regularly scheduled full synthetic oil changes. The car have no indication of engine problems beforehand until the engine blew up at highway speeds.

2015 6. 2l Yukon lifter failure oil changed 2000 miles ago and lifter failed and possible cam damage due to afm lifter failure vehicle has 115,000 miles and gm knows about these lifter failures that can blow engines and cause serious accidents due to rapid loss of power and controls that gm already knew paid alot of money as a certified pre- owned and failed to disclose lifter defects to their customers now at shop for complete inspection and now needs possible new engine when all service requirements were met now looking at thousands of dollars for repairs if known I would have not bought the vehicle. And deceiving gm customers , currently waiting for diagnostic in writing but the courts approved recall already from same issues on 2019 and newer but same lifters are in the same 2015 afm system.

The contact owns a 2015 GMC Yukon xl denali. The contact stated while driving approximately 30-35 mph, the engine and oil warning lights illuminated, and the contact pulled over. There was no indication of oil leaking on the ground. The contact had her son-in-law, an independent mechanic to check the oil and it was determined that the oil level was low. The contact stated that oil was added; however, three days later the oil level was low again. The vehicle was taken to the local dealer and the contact was notified of an excessive oil consumption failure. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA hotline for assistance. The warranty company declined to repair the vehicle. The failure mileage was approximately 85,000.

Collapsed lifter due to afm system.

Lifter failure due to afm. Car shuttered suddenly and then threw codes and had a bad misfire with engine shaking. Spent $6,700 to rebuild.

The contact owns a 2015 GMC Yukon xl. While the contact's wife was driving 50 mph, the engine seized. There were no warning lights illuminated. The contact stated that the vehicle failed to restart. The vehicle was towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. In addition, the contact stated that the vehicle failed to start several times; however, the battery and the alternator were replaced. The contact stated that the vehicle failed to start and was towed to the destination. The manufacturer was not made aware of the failure. The failure mileage was approximately 127,000.

The contact owns a 2015 GMC Yukon xl. The contact stated that while his wife was driving approximately 35 mph, there was an abnormal sound coming from the engine compartment before the vehicle stalled. The driver was able to steer the vehicle into a parking lot. The contact stated that his wife attempted to restart the vehicle; however, the vehicle failed to restart. The contact stated that his wife observed that the check engine warning light illuminated while attempting to restart the vehicle. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The contact stated that prior to the engine failure, the vehicle had been towed to the same dealer for a failure to start. The contact stated that the starter motor and a 12-volt battery were replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 127,000.

In September the check engine light came on and the care began making aloud knocking noise. When we brought it to our mechanic he let us know that the engine had bad connection rods and I would need a new engine. The mechanic stated he has seen this multiple times on gm v8 motors.

The contact owns a 2015 GMC Yukon denali. The contact stated while driving approximately 20 mph, the vehicle started decelerating with a slight clunking sound coming from underneath the front passenger’s side of the vehicle. The vehicle then lost motive power. The contact coasted to the side of the road and turned off the vehicle. After waiting for a while, the vehicle was started and the contact became aware that the instrument panel and all other electrical systems were activated as expected; however, the engine failed to start. The vehicle was towed to the dealer where it was diagnosed that there was a failure with the engine. The vehicle had not been repaired. The vehicle was then towed to an independent mechanic where it was confirmed that the engine had failed, and the starter needed to be replaced. The starter had been replaced; however, while starting the vehicle the engine emitted a loud rumbling noise which the dealer described as rocks being tossed around. The contact stated that the engine needed to be replaced. The vehicle was not repaired. The manufacturer had not been made aware of the failure. The failure mileage was 150,150.

I keep getting a warning on my display on dash about my trailer brake system is not working. Also my temperature gauge stops working and I have to take off negative cable on battery to reset it. Temperature control sensor has been replaced but the problem still continues to happen.

My wife drives a 2015 GMC denali with the 6. 2l engine. My daughter has an almost identical 2016 denali with the same 6. 2l engine. The 2015 had a serious event at approximately 125,000 miles when one of the rocker arm springs broke under ordinary driving conditions and caused the vehicle to be disabled in the midst of heavy traffic. The 2016 had a virtually identical event at 135,000 miles, which caused the rod to be ingested into the cylinder. I believe the rocker arm springs on these engines are defective, also evidenced by after-market double springs being sold for this engine. I have replaced all rocker arm springs on the 2016 with double springs and will do so shortly on the 2015. The gm dealer in corpus christi, TX where we had the 2016 towed told me that the only solution for it was to replace the entire engine at a cost of $11,000+. I paid the dealer $1,000+, towed the truck to san antonio, and had a mechanic in my employ rebuild it for approximately $2,000. The 2015 had not broken the rod and was repaired by a dealer in san antonio for approximately $1,250. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

While driving, the check engine light started to blink and there was a steady knocking coming from the engine. This is the same issues that GMC is currently recalling newer model vehicles for. Safety was at risk because the engine failure happened while driving.

The radiator was replaced under pi1513f in 2020. I am currently experiencing the same coolant leak and thermostat issues. Coolant leaked into 4th cylinder and blew head gasket.

My engine went out, and I had to have it rebuilt. There was a check engine light on. My steering goes out and in without warning while driving. I have talked to the dealership, and they stated that all safety recalls were done on my vehicle. My safety and those of others were put at risk when the steering failed. I almost crashed my vehicle in traffic. There were no warning messages prior to the failure. I did see that there was a recall in 2019 and the dealership will not inspect the vehicle without payment.

Consuming a lot of oil, makes a funny clicking noise sometimes when accelerations, had lil pieces of metal in my oil, transmisson problems, 1 front headlight and all rear tail lights went out, trailer brake system would come on and go off now it won’t stop dinging and makes a whole bunch of other lights come on (trailer brake system, park assist, low brake fluid, traction control, collision) dings some much I can’t drive it. Called a gm shop near me and they told me it would cost a whole bunch for each diagnosis for every warning that came on.

I write to express my concern over an issue with my 2015 GMC Yukon that has also impacted other community members. In April, my Yukon, with just over 70k miles, broke down as I was turning from rte 14 in pembroke, MA onto rte 53. At the time, I had my 3 & 5 year old children in the car with me. I could not get my vehicle to restart & had it towed to a local mechanic. After our local mechanic could not diagnose the problem, on 4/25/23, I had the vehicle towed to marty’s GMC in kingston, MA, where it was purchased. I had to call marty’s regularly to check in on my vehicle before it was finally inspected. After 2 weeks, I was told that the valve spring needed to be replaced & the fluids flushed. I approved those repairs totaling $1600. After a couple of days, I received a phone call that there are issues with the lifters & brakes which would add another week of repairs & bring the costs up to $5,500. After another week, I received a call that there was more work to be done increasing the total cost of repairs by an additional $1,000. When I finally picked the car up, I was notified that the estimates I received were miscalculations & my repair costs totaled $7,512. 23. Since this ordeal, I have talked to several GMC owners with cars of a similar age & low mileage. These owners have experienced the exact same issues. Throughout my conversations, I learned there is a service bulletin out on the issue with the lifters, but no recall. The lifter issue is a serious safety hazard. I have made multiple attempts to reach someone at gm’s corporate office to try & initiate a formal recall for the lifters. No one has been able to tell me how a recall gets issued. This whole ordeal has been a massive burden, both emotionally & financially for my family. It feels as though my young children & I were put in harm’s way for a known GMC issue that could have been avoided.

Vehicle had lifter and valve noise lifters and valves became stuck due to active fuel management system failure transmission shifted poorly due to this condition. Resulting in engine failure and engine replacement at my expense total cost $12,000.

The engine turns off when driving. This has happened at least 50 in the 2 years I've owned the vehicle. It has been serviced at garland shelton GMC in temple, TX. The issue is not fixed. The battery and the negative cable have been replaced. When the engine dies none of the electrical works until I open the hood and wiggle the negative battery cable.

I just got my vehicle into the dealership because it's 115 degrees outside and the air conditioning stopped working. I am 8 hours away from home traveling with 6 children so I begged them to squeeze me in the same day for repair and they did. The dealership is saying it's a crack in the air conditioning condenser and it's $1,600 to repair. This is unbelievable. 80,000 miles on it. This should be a safety concern. Sitting in stop and go traffic for hours in 115 degrees is unacceptable. Gm needs to fix the problem and do their customers right.

Pulling out onto busy road the vehicle make a loud noise and then failed to accelerate and lost power. It was three seconds before the vehicle then slowly accelerated. This continued to happen while driving. The dealer then advised that gm was aware of this issue and has not issued a recall to date. This loss of power was dangerous.

6. 2l engine, collapsed hydraulic lifter afm failure, required $7400 in total repairs. All lifters, camshaft, high pressure fuel lines, high pressure fuel pump, intake manifold & miscellaneous parts and gaskets replaced by selling dealer at 94000 miles. No help of any kind from gm or dealer. This is a well known failure for these engines!.