At low speeds when applying the brake, whether in a turn or traffic, the vehicle will shut off completely. This has happened multiple times and has almost caused accidents on a few occasions. It has also happened while just driving down the road, the entire truck lost power and then came back, the windshield wipers came on as well.
2015 GMC Sierra 1500 engine complaints
Page 2 of 4: complaints 11 to 40 of 85, newest first, as owners wrote them.
With all the GM engine problems being recalled, the known issue witht he AFM/DOD on all the models 2013 and up on 5.3L and 6.2L engines should have been recalled. The valves are known to collapse and nending push rods, causing damage to the cam shaft. This can cause ht eengine not to run. The symptoms and possible icidents include the same as the current recall the federal safety agency Campaign Number: 25V274000. My engine has been repaired twice now due to this AFM/DOD issue. I have all the paperwork from GM dealer that repaired it. I will upload the first repair, I need to scan the second repair. The engine is now making the ticking valve sound ans the vehicle is services regularly. What component or system failed or malfunctioned, and is it available for inspection upon request? AFM/DOD valves collapse causing enegine damage. How was your safety or the safety of others put at risk? Lack of power while driving, loud engine knock Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, by the dealer Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Insepcted by the dealer, and only the damaged parts replaced, not all the valves that can still collapse. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warning, engine light came on due to misfire on both incidents.
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was able to be restarted. The vehicle was taken to an independent mechanic, where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was not repaired. The vehicle was taken to the dealer, where the diagnostic result was confirmed. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 97,000.
The contact owns a 2015 GMC Sierra 1500. The contact stated while driving approximately 50 MPH, the vehicle started to lose motive power and then stalled. The contact stated that there was a black cloud of smoke coming from the exhaust pipe. The check engine warning light was illuminated. The contact had the vehicle towed to an independent mechanic. The vehicle was diagnosed, and it was determined that the rod bearings had failed and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 122,000.
The contact owns a 2015 GMC Sierra 1500. The contact stated that while the vehicle was parked and occupied at the residence, the contact exited the vehicle and went inside his home; however, forty minutes later, while attempting to start the vehicle, the vehicle failed to respond as needed. The contact stated that a bystander inspected the vehicle and assumed the starter had failed. No warning light was illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and suggested that the contact take the vehicle to the local dealer for assistance. The approximate failure mileage was 141,000.
Motor blew up while driving down the road. Had to replace motor on 08/23/2023 at about 116,000 miles. Left me and my family stranded in the middle of no where. Was going around 60 miles an hour and when passing someone got up to 71 mph and then motor blown push rod bent. Transmission issues. Hesitation when switching from park to drive/ reverse. Takes at least 40 seconds and when you accelerate it will jerk so hard. Will lunge forward very sudden and sometimes even when coming to a stop at a stop sign. This happens almost every day.
In the fall of 2023 my 6.2L V8 with only 107,565 well maintained Miles completely seized up and shut off without any warning lights or other indications of failure. I was going up a steep hill and luckily I was able to get to the side of the road by coasting backwards to a stop and fortunately no one else behind me at the time. I did not get my truck back until late spring of 2024. I paid over $13k out of pocket to replace the engine because of this issue that is known to many other GM truck owners. Prior to catastrophic engine failure I’ve had multiple services including replacement of torque converters which would cause the truck to shake violently when shifting along with violent shifts in the 8 speed transmission and at times the feeling of being rear ended when slowing down or coming to a stop which GM claims to be “normal operation”. The engine failure was never investigated by any other parties but was looked at by the dealership service department. Both violent shifts and torque converter shutter were also confirmed by the dealer but only fixed with what I consider to be temporary remedies.
There is a known defect by other consumers with the same year/make/model as mine that causes the radiator to leak. I replaced the original radiator about a year ago with a new GM radiator (84207654) and it’s now leaking as well.
Purchased this vehicle on 06/29/2023 from Robideaux Motors in Coeur d Alene ID. with 81,397 mile on the odometer. On 01/05/2024 the 6.2L engine with 84,109 miles, started having a ticking sound after starting it at my son's house two miles from home. I called the dealer and was told to bring it in for diagnosis by a tech. While driving the truck to the dealer the ticking got worse and motor started to shudder and the check engine light came on. Cause was a misfire on cylinder 4 due to bent push rod and failed lifter. Replaced lifter bank 2 with new push rod. Total cost was $2,852.74 (have invoice). After many calls and letters to my extended warranty company, they finally paid $1688.54 of the total cost. On 08/29/2024 the same ticking sound started again as well as the shudder and check engine light. I had it towed back to Robideaux Motors and was told it was a misfire on cylinder 6 due to lifter failure. Robideaux Motors did repair under their repair warranty. I know that this vehicle is not included in class action suit, due to the year. I feel this to be a continuing problem with the GM 6.2 and 5.3L motors encompassing many model years. Just wanted to document that the number of years covered in the law suit should be expanded.
Truck is equipped with AFM and the lifters failed causing a no -power situation. First happens at 57,000 miles then again at 82,000 miles. Not only was this a dangerous situation, but also a very expensive situation. GM knows these are defective and should have been recalled and repaired on their dime, not mine. Pictures of bill included are only of the first repair. Second repair pictures are available upon request.
Lifter failure cylinder 1 at 82458 should be a recall
The motor goes into a V4 to v6 to v8 Mode on its own .. in which it makes the lifters & pistons change to cause problems with the motor
Had to have transmission replaced and engine work (lifters and cam) on a GM truck with 100,000 miles on it. Cost $8,000. Was told by both mechanics that they've seen many of this same issue with this same year truck for GM.
Had two lifters collapse and fail. Replaced transmission twice due to torque converter failure
The contact owns a 2015 GMC Sierra 1500. The contact stated while his daughter was driving approximately 25 MPH, the vehicle started vibrating violently. The contact stated that his daughter reported seeing several unknown warning lights illuminated. The vehicle was stopped and towed to a dealer. The dealer diagnosed and determined that the rod bearings were damaged and caused damages to the lifters. The contact was informed that the rod bearings and lifters needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The contact researched online and related the failure to Technical Service Bulletin: 20-NA-038 (Engine). The failure mileage was approximately 43,000.
I would like to bring to your attention an alarming incident that occurred on January 3, 2024, with my truck. While accelerating onto the highway, the engine and drivetrain failed suddenly, posing a significant safety risk. The failure left the engine incapable of functioning properly, which could have resulted in a catastrophic accident. Seeking answers about the cause of this dangerous malfunction, I promptly arranged for an inspection by RNZ Concepts. After evaluation, they suspected a potential problem with the hydraulic lifter or camshaft. It is baffling to note that, other than an initial transmission replacement, there were no further indications of any underlying issues, as the truck is regularly serviced. Additionally, within 60 days of purchasing the vehicle, similar issues arose, requiring additional repairs that were paid out-of-pocket at the time. Now, the vehicle is once again out of commission due to persistent GMC failures. The estimated repair cost is expected to be between $6,000 and $10,000.
Rainy road, 60mph on the hw with my family. Truck decides to engage stabilitrak or something to that feel and locked up the brakes. Talk about a scary moment with an 18 wheeler coming in hot behind you. Obviously, in the moment, I had no clue what was happening other than something with the truck was malfunctioning. This scenario could have gone wrong in so many ways. I'm honestly in shock someone has not been killed because of this?
The contact owns a 2015 GMC Sierra 1500. The contact stated that while driving approximately 60 MPH and hauling a boat, the vehicle started operating at reduced power. There were no warning lights illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the push rods were bent, and the lifter had collapsed. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the dealer. The failure mileage was approximately 90,000.
The body has rust coming through on the lower body panels by the rear doors of a crew cab. Have to replace the AC condenser on a 2015 gmc Denali. Looks like GMC already knows there is an issues with this, but no recall on the 6.2L sierra denalis.
Truck loses power engine dies while driving after turning at slow speeds. Engine will restart after a few minutes like it never happened does not show any DTC codes or check engine lights. It is intermittent with no advance notice very dangerous to drive. Seems to be a common problem for all GM trucks and SUVS from 2014 - 2017
Improper cooling cycles causing coolant leaks on the radiator
The issues started when I began to notice that I was not having a constant flow of heat coming out of the vents inside of the vehicle. I brought the vehicle over to a local service center and the mechanic there discovered that my antifreeze reservoir was completely empty, but I did not have a leak. After filling the truck back up with coolant, a few days later, while driving, suddenly the truck began to run rough as if the vehicle went into "limp mode". I noticed that the check engine light was flashing and the traction control light was on. At stops, the truck would rough idle, shake, and there was a large amount of smoke coming from the tailpipe. I was able to get the truck back to the same service center that ran some diagnostic tests. He told me that there is a fault in the number 7 cylinder which has no compression in it. I had the truck towed to a local GMC dealership who confirmed that there was no compression in the number 7 cylinder and said that there was a lifter issue in the engine requiring an expensive fix. GMC had the truck from the Friday after Thanksgiving (the Year 2021) to January 4, 2022, to make the repairs. Repairs were delayed due to the dealership not being able to get the necessary parts in a timely manner.
1. Truck is equipped with AFM (auto fuel management) I found out thru some research models since 2014 having collapsed lifters because of this feature. GMC has not made any attempt to recall this problem and let customers face the repair like me at the cost in my case of 7K. This truck has only 58879 miles on it. Not surprising models as new as 2021 had the same issue with no action taken to correct. 2.My truck lost the steering assistant feature putting me in a potential accident while i was driving. Steering the truck is difficult, especially at low speed which I decided not to drive it. I'm 87 years old and I'm facing numerous repairs for a vehicle with only 58K miles on it in order to safety drive my vehicle
2015 gmc sierra crew 4x4 with 92k miles suffered from lifter and push rod malfunction on cylinder 7. The engine started making a knocking noise, there was a loss of power and the truck was shaking. It seems this a common theme with these trucks.
When decelerating and turning left the car goes completely dead. First time I just about got killed on the highway. The other two times I knew to put it in neutral & crank the car. No steering no nothing. Days Chevrolet in Jasper, Gais trying to tell me there is NO RECALL on my serial number. I see there were a lot of them years ago. In addition to that my power steering occasionally goes out. The last time I was backing into my garage when I had to manually turn it. Hard to do for a woman.
bad lifters causing hesitation and and hard shifting.
62,000 MILES. P0307 error. Replaced spark plugs, coil. head removal, lifter replaced and now another bad lifter. Faulty Active Fuel Management Lifter (AFM Lifters) that results in the Valve Train Defect. In shop for lifter repairs.(2nd time) Cost is $3000. Well maintained truck with all required service completed. Never even towed anything. Vehicle should not have these issues with this low mileage.
2015 GMC Sierra 1500 with 40k miles has developed a radiator leak. Smell of coolant has been evident for a few years but was unable see the actual leak. Seems to occur often in 2014-2018 Sierra 1500. See service bulletin PI1513F. Issue is not covered under warranty.
The A/C condenser is defective, one of the three welds it has is leaking due to lack of proper welding.
Everything is horrible in the truck
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