2015 Gmc Sierra 1500 Engine Problems

While driving at 45 mph, you heard a popping noise and saw smoke coming from the front of your vehicle. Your engine went into limp mode, lost power, and your brakes became unresponsive. As you pulled into a parking lot, flames erupted from under the hood. A bystander used a fire extinguisher and the fire department was called to fully extinguish the fire; you sustained a minor hand injury. This engine fire requires immediate investigation by a qualified mechanic to determine the root cause before the vehicle is driven again.

Your engine suddenly seized while driving at 40 mph on a busy highway, forcing you to pull off the road. You heard a couple of popping noises just before the engine stopped, but there were no warning lights on the dashboard. The engine has not been inspected since the incident and remains in the same condition as when it seized.

Your engine is making a knocking sound caused by a collapsed lifter in one of the Active Fuel Management cylinders, which bent the push rod and damaged the camshaft. Metal fragments from this failure have circulated throughout your oil system, which can cause additional engine damage if not addressed. The engine will need to be inspected and likely rebuilt or replaced, and the oil system will need to be thoroughly flushed.

While driving at 40 MPH, your engine started making a tapping sound and had to be towed to a repair shop. The initial diagnosis found a bent push rod and broken lifter, which were replaced along with all push rods and AFM lifters for about $10,700. The same issue occurred again recently, resulting in catastrophic engine failure that now requires a complete engine replacement.

Your truck's Active Fuel Management (AFM) system failed at 70,000 miles, causing a cylinder 7 misfire error code (P0307) during normal commuting. This happened right after an oil change with no aggressive driving. Fixing this will likely require diagnosis and repair or replacement of the AFM system components, which may include lifters, solenoids, or a full engine rebuild depending on the extent of damage.

Your engine suddenly lost power while driving, forcing you to limp home. A dealer diagnosed failed lifters on one side of the engine, which required several thousand dollars to repair. You had noticed increasing ticking sounds from the engine before the failure occurred, and after the repair, the same ticking has returned after 70,000 additional miles, suggesting the problem may recur. Fixing this issue typically requires replacing the failed valve lifters and related engine components.

Lifter and camshaft failed

See attached document for complaint.

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.

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.

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 while driving 65 MPH, there was a loud pop in the engine compartment. The vehicle was steered to the side of the road where condensation was observed in the middle of the road. The vehicle was towed to a dealer where it was diagnosed that the radiator and transmission needed to be replaced. The vehicle was not repaired. On another occasion, while driving at approximately 20 MPH, the vehicle lost motive power. The vehicle was towed to a dealer where it was determined that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 170,000.

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

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.

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.

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.

I have noticed over the last few weeks I am losing radiator fluid. Its slow but noticeable. Engine temperature rises and fan stays on. My 2015 GMC Sierra 1500 only has 50,150 miles on it, and started well under 50,000. It looks like the leak is from upper contact points of Radiator and frame. I have come to find out that GMC has put a notice out on this issue and put a recall/repair out on the 2014 GMC Sierra 1500 for the same issue. Its a know defect. ( I WILL ATTACH COPIES ) I went to the dealer and was told they would fix the 2014 but have not issued a fix for the 2015. "Not enough complaints"? Its a very expensive fix for a KNOWN manufactured defect but GMC (AND CHEVY TRUCKS) want more complaints.... so here is my filing. Kind of a silly game they are playing when they know it should be a recall issue.

The contact owns a 2015 GMC Sierra 1500. The contact stated while the vehicle was being serviced at the local dealer, he was informed that the radiator had a leak and needed to be replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 55,000.

RADIATOR FORMS STRESS CRACKS FROM CONSTANT THERMOSTAT CYCLING. THE RESULTING CRACKS CAUSE THE RADIATOR TO LEAK. GM HAS ISSUED SPECIAL COVERAGES FOR CERTAIN MODELS BUT DOESN'T ACKNOWLEDGE IT IS A VERY COMMON PROBLEM ON OTHER MODELS OUTSIDE THE COVERAGE.

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.

IT HAS A PROBLEM WITH CYCLING OF THE THERMOSTAT THAT CAUSES STRESS FRACTURES ON THE RADIATOR LEADING TO COOLANT LEAKS. ATTACHED ARE GM BULLETINS ON THE 2014 AND 2015 MODELS. AS ONE CAN SEE THEY HAVE PROVIDED SPECIAL COVERAGE. MY RADIATOR IS LEAKING JUST LIKE THE SERVICE BULLETIN SAYS. THIS NEEDS TO BE RECALL.

WHEN I WAS DRIVING MY TRUCK OFF THE HIGHWAY ONTO THE MAIN ROAD WHERE I WAS GOING I NOTICED THERE WAS AN ISSUE WITH MY TRUCK. AFTER COMING TO A STOP AT A RED LIGHT ONCE IT TURNED I ACCELERATED AND SUDDENLY FELT A JERK FROM THE TRUCK AND HEARD A LOUD WHISTLING NOISE. IT DID THIS MULTIPLE TIMES ABOUT 5-6 TIME EVERY TIME I WOULD ACCELERATE FROM A SPEED OF 30-40. I DECIDED TO DROP IT OFF AT MY LOCAL GMC TO GET IT LOOKED AT. THEY CALLED ME THE NEXT DAY TO PICK IT UP SINCE THEY RAN IT THROUGH DIAGNOSTICS AND DIDN'T FIND AN ISSUE WITH THE VEHICLE. ONCE I GOT THERE I DEMANDED FOR THE MECHANIC TO COME DRIVE THE TRUCK WITH ME TO SEE WHAT THE ISSUE WAS AND THEY DECIDED THEY NEEDED TO KEEP IT FOR A COUPLE OF DAYS TO GET IT LOOKED AT. THEY THEN CALLED TWO DAYS AFTER AND SAID THAT THE TRANSMISSION WAS MESSED UP AND NEEDED A NEW ONE TOTALING THE COST TO $5346.07 WHICH IS CERTAINLY NOT SOMETHING WE CAN AFFORD RIGHT NOW! I DON'T UNDERSTAND HOW THEY DIDN'T SEE THE ISSUE THE FIRST TIME THEY DIAGNOSED IT?? THIS IS SOMETHING THAT NEEDS TO GET RECALLED I HAVE SEEN MANY SIMILAR ISSUES.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT STATED THAT THE RADIATOR TUBE FAILED AND ALLOWED RADIATOR FLUID TO LEAK. THE VEHICLE WAS TAKEN TO BROADWAY CHEVROLET AUTOMOTIVE (2700 ASHLAND AVENUE, GREEN BAY, WI 53404, (920) 498-666), TO BE INSPECTED. THE MECHANIC REPLACED THE RADIATOR AND THERMOSTAT. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NO LONGER UNDER WARRANTY. THE FAILURE MILEAGE WAS 78,000. THE VIN WAS INVALID. *BF *AS

PURCHASED TRUCK NEW 37 MONTHS AGO, HAS 938 HOURS ON THE ENGINE AND 47500 MOSTLY HIGHWAY MILES. NO ACCIDENTS. ACCORDING TO THE DEALER THERE IS A SMALL LEAK IN THE RADIATOR, TOP RIGHT SIDE(FROM THE DRIVER'S SEAT), COST TO REPAIR $1200.

TL* THE CONTACT OWNS A 2015 GMC SIERRA 1500. THE CONTACT TOOK THE VEHICLE TO ASTRO BUICK GMC (2238 WHITE HALL BLVD, WHITE HALL, WV 26554, (304) 366-4460) FOR THE AIR CONDITIONER NOT FUNCTIONING PROPERLY. THE CONTACT WAS INFORMED THAT THE CONDENSER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS APPROXIMATELY 25,000.

AIR CONDITIONING SYSTEM FAILURE. VEHICLE WAS TAKEN TO THE DEALERSHIP FOR OTHER RECALL RELATED SERVICE. I FURTHER REQUESTED THEY CHECK THE HVAC, AS IT STOPPED WORKING APPROXIMATELY 3 WEEKS AGO. I HAD IT RECHARGED ONCE, AND THE CHARGE FAILED TO HOLD. THE GMC DEALERSHIP IN MOBILE, AL EXPLAINED THEY HAVE RECEIVED A LARGE NUMBER OF COMPLAINTS ABOUT FAILURES OCCURRING TO THE AC SYSTEM. HE EXPLAINED IT CENTERS AROUND FAILURE OF A WELD IN THE COILS. HE STATED THE REPAIR COSTS APPROXIMATELY $1,300.00 AT THE DEALERSHIP...HE WAS DISCOUNTING THE COST TO $950.00 TO COMPETE WITH THE LOCAL VEHICLE AC SHOP WHICH CHARGES APPROX $800.00 FOR THE SAME SERVICE. HE ADVISED HE WAS NOT AWARE OF A RECALL FOR THE PROBLEM AND FURTHER ADVISED HE WAS SURPRISED GM HADN'T RECALLED, AS IT'S A KNOWN PROBLEM WITH THE SYSTEM. I AM FILING A FORMAL COMPLAINT IN HOPES OTHERS HAVE DONE THE SAME, AS GM SHOULD BE RESPONSIBLE FOR CORRECTING THIS FAILURE.

TAKATA RECALL. I RECENTLY CALLED THE DEALERSHIP WHERE THEY CONFIRMED MULTIPLE CALLS ON THE AC CONDENSER LEAKING FREON. WE HAVE TWO 2015 GMC SIERRAS WITH THE SAME LEAK. A SERVICE CENTER EMPLOYEE/MECHANIC AT BOB BROCKLAND IN COLUMBIA IL VERIFIED MULTIPLE COMPLAINTS.

AC BLOWING WARM AIR - MAY HAVE A CONDITION WHERE THERMAL CYCLING ON THE COMBINATION TRANSMISSION FLUID/OIL AND AC CONDENSER COOLER CREATES A CRACK THAT MAY ALLOW REFRIGERANT TO ESCAPE. THIS CONDITION CONSEQUENTLY MAY DEACTIVATE THE AC SYSTEM.

HVAC - NO AC COLD AIR.

MY AC CONDITIONS DEVELOPED A PIN HOLE LEAK ALONG THE SEAM/BRAZE.

AIR CONDITIONING CONDENSER FAILED. DOES NOT ALLOW DEFROST TO OPERATE.

MY GMC 2015 DIESEL DURIMAX TRUCK HAD THE ENGINE LIGHT TURN ON AND SAID EMISSION NEEDS SERVICED. IT PROCEEDED TO CUT MY TRAVELING SPEED FROM 75 MPH TO 65 MPH TO 55 MPH. I MADE IT TO DENVER COLORADO BARELY WITHOUT THE TRUCK FALLING TO 4 MPH. I WENT YESTERDAY TO HAVE IT SERVICED. THEY SAID THAT THEY FIXED IT STILL UNDER POWERTRAIN WARRANTY. I DROVE AWAY TO GO BACK TO TEXAS 700 MILES OF HIGHWAY HOME. I DROVE AND THE EXACT SAME PROBLEM HAPPENED AGAIN. I'M WAS ON A HIGHWAY AT THIS POINT WITH HEAVY HIGHSPEED TRAFFIC IN THE MIDDLE OF NOWHERE WHERE THE SPEED LIMIT IS 75 MPH. MY TRUCK SPEED WAS REDUCED BY THE EMISSION SYSTEM AGAIN FROM 75 MPH TO 65 MPH TO 55 MPH. I WAS ALMOST HIT BY A BIG RIG TRUCK WITH MY WIFE IN THE CAR. SOMETIME LATER WERE ALMOST SIDE SWIPED TWICE, AND THEN IT STARTED RAINING AND THE SUN STARTED TO SET, AND MATTERS WENT FROM DANGEROUS TO NEAR DEADLY. WE TRIED TO TURN THE TRUCK AROUND TO GET BACK TO DENVER AND ALMOST WERE HIT AGAIN BECAUSE WITH THE GMC SPEED REDUCTION I COULD NOT ACCELERATE AWAY FROM THE HIGH SPEED CARS COMING AT US. GMC SHUTDOWNS THE CAR SPEED PURPOSELY TO AVOID SOME TINY AMOUNT OF NOX, AND PUT PEOPLE AT RISK OF BEING KILLED ON A HIGHWAY IN RAINY NIGHTIME WEATHER. WE FINALLY MADE IT BACK TO DENVER JUST 19 MILES BEFORE THE TRUCK SPEED WOULD HAVE BEEN REDUCED TO 4 MPH. WE WOULD HAVE TO BEEN ON THAT 75 MPH HIGHWAY RIDING IN THE RIGHT SIDE OF THE SLOW LANE AT 4 MPH !!!!! AT NIGHT IN THE RAIN WITH HIGH SPEED 18 WHEELERS GOING BY AT 75 TO 85 MPH. THE GOVERNMENT AND GMC ARE INSANE TO HAVE DESIGNED THIS, I AM BRINGING IT TOMORROW TO GET TRY TO GET IT FIXED AGAIN BUT THE ORDEAL I WENT THRU IS STILL SCARY AS HELL, AND WORRIED ABOUT IT GETTING FIXED. WE COULD BE KILLED DUE TO THIS. I AM AN ENGINEER DEALING WITH PUBLIC SAFETY, AND I AM IN SHOCK CONCERNING GMC'S AND THE GOVERNMENT OVER STEP IN THIS DESIGN. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

PROBLEM PRESENTED AS ENGINE DYING AT STOP SIGNS AND PROGRESSED TO ENGINE MISS WITH RANDOM ENGINE STOP. WAS SENT TO SHOP 3 TIMES OVER A EIGHT WEEK PERIOD WITH NO RESOLUTION TO PROBLEM.

I BOUGHT THIS TRUCK NEW IN 4/2106 AND THERE IS A CLICKING SOUND WHEN ENGINE IS RUNNING. IS THIS NORMAL?

2015 GMC SIERRA HAS A DELAY THROTTLE RESPONSE. DOES IT AT ALL SPEEDS AND FROM TAKE OFF. TOOK TO DEALER AND SERVICE ADVISOR PULLED TRUCK IN SHOP. GOT OUT AND SAID IT DOES HAVE A DELAY. THE RAN VIN NUMBER THROUGH GMC DATA BASE AND TOLD ME. MANUFACTURE SAID IT WAS A NORMAL THING. IT'S NOT NORMAL AND NEVER HAD A VEHICLE WITH A THROTTLE DELAY.

MADE 1 TRIP OUT OF STATE TO VISIT MY SON AND TO CARRY HIM A BEDROOM SUITE. I LIVE IN GA. AND HE LIVES IN TENN. WHEN I RETURNED I NOTICED FLUID UNDER THE TRUCK. CALLED DEALER IN BRUNSWICK GA. THEY SAID TO BRING THE TRUCK THEN. WHEN TRUCK WAS PUT ON RACK, FOUND ENGINE HEADS WERE FAULTY. HAD TO ORDER NEW HEADS, THEN HAD TO MACHINE HEADS WHEN ARRIVED. ALSO TRANSMISSION DOWN SHIFTED EXTREMELY HARD IN HILLS OF NORTH GA. TO THE POINT OF ENGINE RPM 4500. CONTACTED GMC COMPLAINT DEPT. BUT AS OF 6/2/15 NO HELP.