2015 GMC Sierra 1500 Engine

The engine seized up traveling about 40MPH in the middle lane on a busy road with my child in the passenger seat. I was able to get off the busy road but part of my truck was still intruding into the lane. The truck is parked at my house. The vehicle has not been inspected by anyone and is still in the same condition as the day the engine seized. The only thing that indicted any issue was a couple popping noises right before the engine seized. It all happened while I was driving in traffic and I did not notice any indications on dash. I was more concerned about getting off the road and out of traffic before I got rear-ended or involved in a pile up.

This occurred 5+ years ago. Coming home one night I had a sudden loss of power with the truck and barely made it home. Was able to limp the truck to the dealership the next day and was told that one side of the engines lifters had failed. Prior to the failure I had noticed a ticking sound coming from the engine that was becoming increasingly more prominent. It was several thousand dollars to repair. Fortunately the failure occurred near home, not on the freeway where I could have been dodging cars while trying to limp the truck to the shoulder. Some online research while the repair was being done revealed that several other owners with the 6.2L engine had the same problem. When I mentioned it to the dealer the response was that they had no bulletins from GM on the issue and I was stuck with the bill. Got the same response a year or two later when the torque converter on the transmission went out. The reason I am reporting it now is I saw that GM is recalling 6.2L vehicles with lifter issues but not back to 2015 even though the issue appears to go back farther than that. They claim it's limited to a specific run of engines for the recall. They have been having various lifter problems for many years that have put drivers in danger when they fail but refuse to acknowledge it. As for the repair they made to the engine I've driven another 70 K miles and the ticking has started again. I fear another failure. Please note that the date previously given for the incident is my best guess.

Lifter and camshaft failed

The GMC Sierra 1500 started a knocking sound. The collapsed lifter on a AFM cylinder bent a push rod which led to cam failure. Metal fragments are throughout the oil system.

See attached document for complaint.

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.

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 NHTSA 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 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 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 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.

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.

While driving the vehicle at approximately 40MPH the motor made a tapping sound, I was able to pull into a parking lot and have the vehicle towed to the dealer. The dealer told me that the vehicle was out of warranty and appeared that under initial inspection the would have to rebuild the motor due to a lifter failure at the estimated cost of $18,000. I had the vehicle towed to a reputable repair shop and after the did a tear down to the small block they determined a bent push rod and broken lifter, all pushrods and AFM lifters were replaced at the cost of $10,754. dollars as invoice shows. The issue occurred again on 10/25/25 causing catastrophic failure that will cost me a complete engine replacement.

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.

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.

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.

Improper cooling cycles causing coolant leaks on the radiator

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.

bad lifters causing hesitation and and hard shifting.

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.

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.

I TOOK VEHICLE TO DEALER FOR TEST DRIVE FOR TRADE IN PURPOSES AND WAS INFORMED THAT MY RADIATOR LEAKED AND IT WAS A PROBLEM WITH 2015 GMC SIERRA AND NEEDED REPLACING FOR $1400. THERE IS A RECALL FOR SAME PROBLEM WITH 2014 YEAR BUT NOT 2015 AND THIS SHOULD BE CORRECTED BECAUSE IT IS A KNOWN DEFECT AND CONSUMER SHOULD NOT HAVE TO PAY FOR DEFECTIVE PART.