2015 GMC Yukon Complaints

ENGINE — Filed 08/15/2026

The vehicle developed a recurring cylinder #4 misfire with a flashing check-engine light, rough running, and reduced performance. Diagnostic code P0304 repeatedly returned. Replacing the #4 spark plug temporarily restored normal operation, but the misfire returned after a few hundred miles. The #4 plug was wet/oily, and fresh oil was found pooled in the #4 intake port while the other ports were dry. All eight spark plugs, ignition coils, and plug wires were replaced, along with the #4 fuel injector and both #4 valve-stem seals, but the misfire persisted. A valvetrain/lifter tick later became audible near 3,000 RPM. The failure has now been confirmed as a valvetrain failure that severely damaged/destroyed cylinder #4 and requires complete engine replacement. The vehicle is available for inspection upon request. This defect creates a serious risk of severe misfire, loss of engine performance, or complete engine failure while driving.

ENGINE,FUEL/PROPULSION SYSTEM — Filed 10/16/2024

While traveling at highway speeds on Interstate 5 in Oregon, my 2015 GMC Yukon Denali experienced a sudden, catastrophic engine failure with zero advance warning. The vehicle instantly lost almost all propulsion and power while surrounded by high-speed traffic, creating an immediate and severe safety hazard on a major interstate. The engine began making a loud, severe knocking noise, and I was forced to navigate across lanes without adequate power to reach the shoulder. The vehicle was towed and inspected by Point S in Creswell, OR, where diagnostics confirmed a P0300 random/multiple cylinder misfire, with cylinder 4 specifically misfiring. Using a stethoscope and scanner to isolate the failure, technicians confirmed a catastrophic rod knock failure at the bottom end of the engine. The vehicle was then taken to Sam’s Automotive Service, where a complete engine replacement was executed at a total out-of-pocket cost of $16,000. General Motors has a well-documented history of internal engine failures on these 6.2L V8 platforms, yet they have failed to issue a safety recall for vehicles experiencing this sudden, dangerous highway power loss.

STEERING,AIR BAGS,SERVICE BRAKES — Filed 02/02/2026

My 6 year old son and I were coming down the road and came up on 2 deer and I was coming up on a sharp curve and when I hit my brakes my steering wheel LOCKED up completely and the steering wheel is so bent where I tried my best to control it but I failed and we hit a tree head on. Broke my nose and my sons leg broke in between the back seat air bag and door air bag

SERVICE BRAKES, HYDRAULIC,AIR BAGS — Filed 05/04/2026

The contact owns a 2015 GMC Yukon. The contact stated that while driving at 40 MPH, the rear brakes became inoperable, causing the steering wheel to seize, with no warning lights illuminated. Due to the failure, the vehicle crashed into a tree. The contact and the contact’s child sustained injuries and were transported to a local emergency room for medical treatment. The contact suffered a broken nose and a chest fracture. The contact’s child sustained a broken leg due to deployment of the passenger-side air bag. The contact stated that the air bags deployed during the crash; however, the driver’s air bag failed to deploy. A police report was filed. The vehicle was towed to the contact’s residence. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was not available.

SERVICE BRAKES — Filed 04/23/2026

There is a recall on my 2015 GMC Yukon, that I am not the original owner of. The recall is for the brake booster and says that it expired. I have had the car checked by two different shops (both confirmed it was this), and one of them was the local GMC dealership by my house. I called to make an appointment for the recall to be fixed, to which they said they needed to order parts and it would take a few weeks. I dropped the car off three weeks later per their request for then another person to call me and say they won't fix it because it is expired. It is a safety matter that the breaks don't work occasionally.

POWER TRAIN — Filed 12/02/2025

The contact owns a 2015 GMC Yukon. The contact stated that while in reverse(R), the vehicle jerked while depressing the accelerator pedal. There was no warning light illuminated. The contact became aware of fluid spots on the driveway while the vehicle was parked. The vehicle was taken to an independent mechanic who discovered a leak in the transmission oil cooler line. The dealer then informed the contact about NHTSA Campaign Number: 14V152000 (Power Train); however, the VIN was not included in the recall. The vehicle was not repaired. The manufacturer was notified of the failure and transferred the contact to the NHTSA Hotline to report the failure. The failure mileage was unknown.

ENGINE — Filed 11/28/2025

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

STEERING — Filed 11/21/2025

Electric Power Steering (EPS) assist was lost while I was driving the vehicle. As a result, I had difficulty steering the vehicle without power steering and almost caused a crash.

ENGINE — Filed 07/24/2025

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.

ENGINE — Filed 06/06/2022

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!

STEERING — Filed 09/18/2025

Vehicle has issue turning at times message on dash says reduced steering had trouble turning and almost caused a accident

UNKNOWN OR OTHER — Filed 10/27/2025

I bought a car in early 2024 ive had it for 1.5y I recently went to trade it in for something more suitable for me and they ran a carfax and mileage rollback popped up and I had no clue to begin with. They rolled back 100,000 miles on the vehicle. They’re blaming the finance company but they can’t because the finance company never had the vehicle in there possession

POWER TRAIN — Filed 03/23/2023

Today my GMC Yukon, lurked forward so hard it hurt my neck, shoulders, and back, I know this is dangerous and has happened before, the lurches are becoming more forceful and powerful and I'm afraid now of driving it far or distance, I don't want anything to happen to me or my family while driving, I must be able to get to appointments etc. This today scares me really bad and I need help with this vehicle...Had I not braked quick I would have been in the pond in front of me the lurk was hard pain shot from back to neck and I went forward, had on my seat belt loges...If not better in the morning I will seek medical attention, I'm really hurting...GMC said noting wrong on both occasions I asked when it was mild in 2019, again 2023, nothing...no...also no warning lights are on

UNKNOWN OR OTHER — Filed 10/16/2021

I was driving my 2015 GMC Yukon a light illuminated on the dashboard. I pulled over at a Convenience store. Got my children out of the car. Once out of the vehicle I noticed smoke. Within the matter of 2 mins the truck was engulfed in flames.

SERVICE BRAKES — Filed 10/11/2020

TL* THE CONTACT OWNED A 2015 GMC DENALI. THE CONTACT STATED THAT WHILE THEIR HUSBAND WAS DRIVING APPROXIMATELY 45 MPH, WHEN THE TRAFFIC CAME TO A SUDDEN STOP CAUSING THE CONTACT TO APPLY THE BRAKES TO THE VEHICLE. THE DRIVER HAD TO DEPRESS THE BRAKING PEDAL EXCESSIVELY, HOWEVER, THE BRAKES DID NOT STOP AND THE BRAKES WERE FLOORED. THE VEHICLE ENDED UP REAR ENDING THE VEHICLE IN FRONT. THE AIR BAGS DID DEPLOY. THE VEHICLE WAS TOWED AND TOTALED. A POLICE REPORT WAS FILED. THE PASSENGER RECEIVED INJURIES TO THE CHEST AND LOWER ABDOMEN AREA. THE ONLY MEDICAL ATTENTION RECEIVED WAS BY EMT AT TIME OF THE CRASH. THE DEALER (CARDINALE GMC 2 HEITZINGER PLAZA, SEASIDE, CA 93955, (831) 322-4112) WAS MADE AWARE. THE CONTACT STATED THEY RECEIVED A NOTICE REGARDING THEIR VEHICLE HAVING ANTI-LOCK BRAKING ISSUES AFTER THE CRASH HAD OCCURRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 73,000. THE VIN WAS NOT AVAILABLE. *LN*DT*DT*JB THE CONSUMER PROVIDED PHOTOS. *TR

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE — Filed 12/01/2019

CAR WAS PARKED IN FRONT OF OUR HOUSE AND COMBUSTED IN THE MIDDLE OF THE NIGHT WHILE WE WERE SLEEPING. CAR WAS EXPLODING AND ENGULFED IN FLAMES...COMPLETELY DESTROYED VIA FIRE AND THE WORST DAMAGE WAS IN THE ENGINE COMPARTMENT. CAUSE OF THE FIRE IS UNKNOWN ALTHOUGH BASED ON RESEARCH SOUNDS LIKE NHTSA CAMPAIGN #14V007000 OR 14V152000. FIRE DEPARTMENT EXTINGUISHED THE FIRE AND POLICE WERE ON THE SCENE.

UNKNOWN OR OTHER — Filed 11/12/2019

A FEW DAYS AGO I GOT OUT OF MY TRUCK TO RETRIEVE A PACKAGE LEFT AT MY GARAGE DOOR. I PUT MY VEHICLE IN PARK WALKED AROUND MY CAR DOOR WALKED BY THE FRONT OF MY TRUCK TO RETRIEVE THE PACKAGE AND ALL THE SUDDEN I WAS KNOCKED DOWN. I DID NOT REALIZE WHAT HAPPENED UNTIL I LOOKED UP AND SAW MY TRUCK DRIVING TOWARDS ME. I SCREAM FOR HELP AS I CRAWLED BACKWARDS TO SAFETY. A FEW MINUTES LATER I REALIZE THE TRUCK WAS NO LONGER MOVING AND BY THE GRACE OF GOD MY WHEELS WERE TURNED SLIGHTLY AND IT HAD STOPPED BECAUSE IT HIT THE SIDE OF MY HOUSE. IT TOOK A COUPLE OF DAYS FOR THE SHOCK TO WEAR OFF OF WHAT COULD HAVE HAPPENED TO ME OR MY KIDS IF THEY WERE PLAYING OUTSIDE. MY HUSBAND AND I SPOKE TO A COUPLE OF PEOPLE INCLUDING A CERTIFIED MECHANIC AND WE FOUND OUT THAT THIS HAS HAPPENED BEFORE ON THE 2015 YUKONS. I AM ATTACHING PICTURES OF WHAT WE FOUND FROM GMC ALONG WITH MY TRUCK.

VEHICLE SPEED CONTROL,FUEL/PROPULSION SYSTEM — Filed 09/05/2019

WHEN THE GAS PEDAL IS DEPRESSED FULLY, THE GAS PEDAL STICKS THE CAR CONTINUES ACCELERATING. THE PROBLEM BEGAN WITH INITIAL COMPLETE DEPRESSION OF GAS PEDAL TO CAUSE SOME ACCELERATION AND DEPRESSING BRAKE ALLOWED VEHICLE TO RETURN TO NORMAL DRIVING. THE PROBLEM HAS WORSENED OVER TIME TO THE POINT WHERE BOTH FEET DEPRESSING ON THE BRAKE PEDAL DID NOT AFFECT ACCELERATION AND CAUSED SMOKE TO EMIT FROM BOTH FRONT BRAKE PADS, AND THE PASSENGER FRONT BRAKE PAD FLAMED UP FROM THE HEAT. THE CAR WAS DRIVEN INTO A PARKING LOT WITH THE BRAKE DEPRESSED THE ENTIRE TIME, AND TURNED OFF. SO FAR, THIS HAS ONLY HAPPENED WHEN THE GAS PEDAL IS FULLY DEPRESSED. THE DEALER TOLD ME THE MAT CAUSED THIS EVEN THOUGH THE MAT IS CUT AROUND THE GAS PEDAL WITH PLENTY OF ROOM TO NOT OBSTRUCT PEDAL. THE MAT ALSO DOES NOT SLIDE OR MOVE ABOUT THE AREA. THE GMC DEALER TOLD ME THEY TOOK THE MAT OUT AND DID NOT NOTICE ANY AUTO ACCELERATION, AND THEY TOLD ME THEY WERE UNABLE TO DEPRESS THE GAS PEDAL FULL TO ATTEMPT TO RECREATE THE PROBLEM, TO NOT COMPROMISE THE SAFETY OF THE OTHER CARS NEARBY.

AIR BAGS — Filed 08/05/2019

I WAS INVOLVED IN A COLLISION WHERE MY VEHICLE ENDED UP IN A DITCH AND HIT A CEMENT CULVERT HEAD ON. THE STEERING WHEEL AIRBAG DIDN'T DEPLOY. ALL AIRBAGS ALONG THE SIDES OF THE VEHICLE DID, BUT NEITHER FRONT WERE ACTIVATED. ALTHOUGH I DIDN'T HAVE A PASSENGER IN THE VEHICLE, THERE WERE OTHER ITEMS IN THE SEAT THAT WERE QUITE HEAVY.

SERVICE BRAKES — Filed 04/26/2019

DRIVING THE 2015 GMC YUKON, TRIED TO APPLY BRAKES, BRAKES WENT TO FLOOR AND NO BRAKING AVAILABLE. HAD TO JUMP A MEDIAN IN THE ROAD TO GET CAR STOPPED. CALLED DEALERSHIP, THEY WERE AWARE AND SAID DRIVE IT THERE, ALMOST WRECKED AGAIN PULLING INTO PARKING OT AT DEALERSHIP. YOU CANNOT DRIVE THE CAR LIKE THIS, VERY DANGEROUS. BEING TOLD ITS A COMMON PROBLEM THAT GMC KNOWS ABOUT BUT WILL ONLY FIX IF ITS 70,000 OR 6 YEARS. NOT OK, FIX THE PROBLEM MY CAR IS STILL UNDER WARRANTY UNTIL 100,000 MILES! VACUUM PUMP, VACUUM PUMP BELT, BRAKE BOOSTER, MASTER CYLINDER AND VACUUM PIPE ALL NEED REPLACING!!!!!! MAKE A RECALL BEFORE MORE PEOPLE ARE HURT!!!!

AIR BAGS,SEAT BELTS,SERVICE BRAKES — Filed 12/26/2018

HAD AN ACCIDENT IN 2018 AIR BAGS DID NOT DEPLOY AND WHEN TRIED TO STOP AND PUSHED ON MY BRAKE PEDAL, IT WAS LIKE IT FROZE AND I WAS STILL MOVING. I WAS DRIVING 37MPH ON A CITY STREET WHEN THE ACCIDENT HAPPENED.

ELECTRICAL SYSTEM — Filed 02/01/2019

WIRING TO RADIATOR FAN CAUGHT ON FIRE. I WAS DRIVING THE CAR WHEN I SMELLED SMOKE. WHEN I PULLED OVER SMOKE WAS COMING FROM THE HOOD I OPENED THE HOOD AND THERE WAS OPEN FLAMES ON THE FAN WIRING WIRING.

STEERING,WHEELS — Filed 08/28/2018

DURING MANEUVER IN PARKING LOT TRYING TO TURN AROUND STEERING GOT EXTREMELY STIFF WHICH RESULTED IN ME RUNNING INTO SIDE WALK, RAMP. THE ONLY PART OF MY VEHICLE THAT WAS DAMAGE WAS THE DRIVER SIDE FRONT WHEEL. CURB RASH BEYOND REPAIR. AT THE TIME I WAS NOT AWARE OF VEHICLE RECALL AND DID NOT FILE AN ACCIDENT REPORT.

SUSPENSION,AIR BAGS,WHEELS — Filed 11/05/2015

TL* THE CONTACT OWNS A 2015 GMC YUKON. WHILE DRIVING 20 MPH, THE FRONT DRIVER SIDE WHEEL AND AXLE FRACTURED AND CAUSED THE CONTACT'S VEHICLE TO CRASH INTO A PARKED VEHICLE. THE CONTACT STATED THAT THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED A FRACTURED FINGER AND CEREBRAL HEMORRHAGING, WHICH REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS TOWED TO THE DEALER, BUT WAS NOT REPAIRED. THE VIN AND FAILURE MILEAGE WERE UNAVAILABLE.

ELECTRICAL SYSTEM — Filed 08/13/2015

TL* THE CONTACT OWNS A 2015 GMC YUKON. THE CONTACT STATED THAT WHILE REVERSING, THE VEHICLE STALLED WITHOUT WARNING ON TWO SEPARATE OCCASIONS. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSTIC TESTING ON SIX SEPARATE OCCASIONS. THE CAUSE OF THE FAILURE COULD NOT BE DETERMINED. ON ANOTHER OCCASION, THE CONTACT WAS REVERSING AND THE VEHICLE STALLED CAUSING THE CONTACT TO CRASH INTO A VEHICLE PARKED NEAR THE REAR OF THE VEHICLE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 9,000. UPDATED 11/18/15*LJ THE CONSUMER STATED THE VEHICLE ALSO HAD NUMEROUS OTHER ELECTRICAL ISSUES. SOME OF THE ISSUES CAUSED THE VEHICLE TO SHUT DOWN OR REVERSE. UPDATED 1/12/2016 *JS UPDATED 01/29/16.*JB