FaultScore

FaultScore report

2015 GMC Yukon Denali XL problems

Owners have filed 94 complaints about the 2015 GMC Yukon Denali XL with NHTSA between 2017 and 2025. The largest single group is the lights. Across this model's run it ranks 3 of 13 worst.

C

FaultScore 50/100

Higher is worse. Measured against the other years of the GMC Yukon Denali XL.

How this is worked out

The numbers

94

Complaints

0

Crashes reported

0

Fires reported

0

Injuries reported

60,000 mi

Median mileage at failure

Half of reported failures happened before this

13%

Failed under 36,000 miles

Inside a typical bumper-to-bumper warranty

What kind of bad

The letter says how bad. This says what kind — whether this year drew an unusual number of complaints, unusually dangerous ones, or failures that arrived unusually early.

Complaint volume 91 vs 50 Severity 0 vs 50 Early failure 23 vs 50
The dashed ring is 50 — the national norm. Further out is worse.
Complaint volume — 91
Against the median year of the GMC Yukon Denali XL. 50 means typical for this model; 100 means roughly double.
Severity — 0
0% of these complaints involved a crash, fire, injury or death, against a national rate of 9.7%.
Early failure — 23
13% of failures with a mileage on record happened under 36,000 miles, against a national rate of 29%.

How 2015 compares with every other GMC Yukon Denali XL

Click any bar to open that year's report.

Complaints filed with NHTSA, by model year. Bar colour is the FaultScore grade: A B C D F ungraded

What breaks on a 2015 GMC Yukon Denali XL

Every complaint is filed against a part. Follow any row for the complaints about that part alone.

Lights 36 38.3%

Median failure at 60,700 miles

Median failure at 66,250 miles

Transmission & Drivetrain 9 9.6%

Median failure at 52,000 miles

Other & Unspecified 7 7.4%

Median failure at 60,000 miles

Suspension 5 5.3%

Median failure at 35,000 miles

Engine & Cooling 5 5.3%

Median failure at 53,500 miles

Acceleration & Cruise Control 3 3.2%

Median failure at 55,000 miles

Steering 3 3.2%

Median failure at 46,000 miles

Wheels 2 2.1%

Median failure at 40,500 miles

Fuel & Propulsion 2 2.1%

Median failure at 97,000 miles

Body & Structure 2 2.1%

Median failure at 21,000 miles

Brakes 2 2.1%

Median failure at 85,500 miles

Stability & Traction Control 1 1.1%

Median failure at 50,000 miles

Windows, Mirrors & Wipers 1 1.1%

Median failure at 104,200 miles

When it fails

Odometer readings owners gave when they filed. About half of all complaints include one.

10,000 – 24,999 miles 5 6.1%
25,000 – 49,999 miles 14 17.1%
50,000 – 74,999 miles 45 54.9%
75,000 – 99,999 miles 11 13.4%
100,000 – 149,999 miles 7 8.5%

When owners complained

A spike years after the car went on sale usually means a part wearing out on schedule across the whole fleet — the kind of pattern no single owner can see from inside their own car.

May 2017 peak 11 Jun 2025

NHTSA investigations into the 2015 GMC Yukon Denali XL

An investigation is the step before a recall: the agency has seen enough complaints to look into a pattern itself. An open one means it thinks something may be wrong and nothing has been fixed yet.

PE18012 Opened 20 Nov 2018 Closed 10 Apr 2022 SERVICE BRAKES

Brake Vacuum Pump Failure

On November 20, 2018, the Office of Defects Investigations (ODI) opened PE18-012 to investigate instances of sudden onset of a hard brake pedal that could result in extended stopping distance due to an issue with the brake assist vacuum pump in model year (MY) 2014 through 2016 GMC Sierra 1500 and Chevrolet Silverado 1500 series pickup trucks and MY 2015 through 2016 Cadillac Escalade, Chevrolet Suburban, Chevrolet Tahoe, and GMC Yukon SUVs.If the brake assist vacuum pump fails to operate as intended, the amount of brake power assist supplied to the driver can be significantly reduced, extendi...

The most recent complaints

In the owners' own words, exactly as filed with NHTSA.

at 85,000 miles Burrows, IN

ENGINE AND ENGINE COOLING

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.

NHTSA complaint #11667092 — an unverified report by a vehicle owner.

at 126,000 miles Genoa, OH

FUEL SYSTEM, GASOLINE

The contact owns a 2015 GMC Yukon Denali XL. The contact stated that while driving at an undisclosed speed, gasoline would leak out of the fuel tank. The vehicle was taken to the dealer; however, the vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure. The contact related the failure to TSB Number: 14858 (High-Pressure Fuel Pump). The failure mileage was approximately 126,000.

NHTSA complaint #11449781 — an unverified report by a vehicle owner.

at 40,000 miles Tazewell, TN

EXTERIOR LIGHTING:TAIL LIGHTS

The contact owns a 2015 GMC Yukon Denali XL. The contact stated that the passenger’s side taillight failed to illuminate intermittently while depressing the brake pedal. Over time, the driver’s side taillight also would fail to illuminate with the brake pedal depressed. The contact then received a warranty notice from the local dealer about the failure however, the contact was informed when speaking to the dealer that due to the mileage on her vehicle, the vehicle no longer qualified under the warranty program. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 40,000.

NHTSA complaint #11426853 — an unverified report by a vehicle owner.

at 32,000 miles Rock Springs, WY

EXTERIOR LIGHTING

THE PASSENGER SIDE TAILLIGHT STARTED 'GOING OUT' RIGHT AFTER THE WARRANTY EXPIRED-MEANING, IT WOULD WORK OFF AND ON AT VARIOUS TIMES. THEN THE DRIVERS SIDE TAILLIGHT HAS STARTED DOING THE SAME THING. THIS IS A KNOWN ISSUE WITH THE GMC TAILLIGHTS AND YET GMC HAS YET TO RECOGNIZE ANY ISSUE. THIS IS A MAJOR SAFETY ISSUE FOR ANYONE DRIVING THESE MODELS WITH FAILING TAILLIGHTS. THIS NEEDS TO BE INVESTIGATED

NHTSA complaint #11222648 — an unverified report by a vehicle owner.

at 60,000 miles Victoria, MN

WHEELS

THE WHEELS HAVE CORROSION AND SHARP EDGES HAVE STARTED TO FORM. THESE SHARP EDGES ARE PUTTING PRESSURE ON THE THE TIRES CAUSING THEM TO LOSE AIR. WE WERE REQUIRED TO PURCHASE NEW WHEELS AS THE ONLY SOLUTION. WHEELS SHOULD LAST THE LIFE OF A VEHICLE, NOT FOUR YEARS.

NHTSA complaint #11221505 — an unverified report by a vehicle owner.

at 60,000 miles Victoria, MN

SUSPENSION

THE WHEELS HAVE CORROSION AND SHARP EDGES HAVE STARTED TO FORM. THESE SHARP EDGES ARE PUTTING PRESSURE ON THE THE TIRES CAUSING THEM TO LOSE AIR. WE WERE REQUIRED TO PURCHASE NEW WHEELS AS THE ONLY SOLUTION. WHEELS SHOULD LAST THE LIFE OF A VEHICLE, NOT FOUR YEARS.

NHTSA complaint #11221505 — an unverified report by a vehicle owner.

at 33,534 miles Jamaica, NY

POWER TRAIN

MY YUKON MAKES VERY HARD SHIFTS WHEN ACCELERATING AND DECELERATING. THE TCM WAS REPROGRAMMED AFTER VEHICLE SHUT OFF ON THE HIGH WAY LAST NOVEMBER. NOW THE TRUCK SHUDDERS BETWEEN 25 AND 45MPH ESPECIALLY WHEN CLIMBING OR FILLED WITH PASSENGERS. VIBRATION CAN BE FELT THROUGH THE CABIN.

NHTSA complaint #11219096 — an unverified report by a vehicle owner.

at 65,000 miles Naples, FL

EXTERIOR LIGHTING

FAULTY BRAKE-LIGHT AND COSTLY FIX. DEALERSHIP HAS TAILLIGHT ON BACK ORDER SO A REPLACEMENT ISNT EVEN AVAILABLE. DEALERSHIP WANTS $675 JUST FOR THE PART THAT CANT EVEN BE ORDERED. DANGEROUS TO DRIVE THE VEHICLE WITH NO SOLUTION AVAILABLE.

NHTSA complaint #11218774 — an unverified report by a vehicle owner.

at 65,000 miles Naples, FL

ELECTRICAL SYSTEM

FAULTY BRAKE-LIGHT AND COSTLY FIX. DEALERSHIP HAS TAILLIGHT ON BACK ORDER SO A REPLACEMENT ISNT EVEN AVAILABLE. DEALERSHIP WANTS $675 JUST FOR THE PART THAT CANT EVEN BE ORDERED. DANGEROUS TO DRIVE THE VEHICLE WITH NO SOLUTION AVAILABLE.

NHTSA complaint #11218774 — an unverified report by a vehicle owner.

at 67,500 miles Lansing, MI

EXTERIOR LIGHTING

TAIL LIGHTS INTERMITTENTLY GO OUT WITHOUT NOTICE. THIS CAN HAPPEN WHILE DRIVING OR STATIONARY

NHTSA complaint #11218606 — an unverified report by a vehicle owner.

at 67,500 miles Lansing, MI

ELECTRICAL SYSTEM

TAIL LIGHTS INTERMITTENTLY GO OUT WITHOUT NOTICE. THIS CAN HAPPEN WHILE DRIVING OR STATIONARY

NHTSA complaint #11218606 — an unverified report by a vehicle owner.

Remlap, AL

ELECTRICAL SYSTEM

REAR PASSENGER BRAKE LIGHT WORKS INTERMITTANTLY WHILE DRIVING.

NHTSA complaint #11218693 — an unverified report by a vehicle owner.

at 53,000 miles Farmington, NM

EXTERIOR LIGHTING

WE HAVE HAD BOTH OUR TAILLIGHTS FAIL. THE BLINKERS STILL FUNCTION BUT BECAUSE THEY ARE LED THEY SAY THEY MUST REPLACE THE WHOLE UNIT. EACH SIDE COST $672. THAT IS OUTRAGEOUS FOR A TAILLIGHT. THERE NEEDS TO BE A WAY TO REPLACE EACH PIECE.

NHTSA complaint #11216937 — an unverified report by a vehicle owner.

Guymon, OK

POWER TRAIN

TL* THE CONTACT OWNS A 2015 GMC YUKON DENALI XL. WHILE ATTEMPTING TO SHIFT THE VEHICLE FROM PARK INTO DRIVE, THE TRANSMISSION MADE A HARD CLUNKING SOUND. ALSO, WHILE DRIVING BETWEEN 30-50 MPH, THE VEHICLE VIBRATED ABNORMALLY. THE VEHICLE WAS TAKEN TO LEWIS CHEVROLET BUICK OF LIBERAL (LOCATED AT 202 N GRANT AVE, LIBERAL, KS 67901, (620) 624-2584) WHERE IT WAS DIAGNOSED THAT THE TRANSMISSION FLUID NEEDED TO BE FLUSHED AND REFILLED. THE VEHICLE WAS SERVICED, BUT THE FAILURE PERSISTED. THE MANUFACTURER WAS CONTACTED. THE FAILURE MILEAGE WAS UNKNOWN.

NHTSA complaint #11210540 — an unverified report by a vehicle owner.

at 44,500 miles Poquoson, VA

EXTERIOR LIGHTING

VEHICLE HAS UNDER 45,000 MILES AND BOTH HEADLIGHTS NEED TO BE REPLACED DUE TO MALFUNCTIONING LED'S FROM WATER INTRUSION. THIS HAPPENS AFTER WASHING MY CAR AND NOW IT WILL NOT PASS STATE INSPECTION DUE TO DRIVER SIDE DAYTIME LED NOT TURNING ON, AND PASSENGER SIDE DRL NOT TURNING OFF. I CAN NOT GET THIS FIXED BECAUSE THE PASSENGER SIDE LIGHT IS ON BACKORDER, YET MY LOCAL DEALER SAID THIS ISN'T A KNOWN PROBLEM. TAKE A LOOK ON THE INTERNET AND IT'S CLEARLY A MANUFACTURING ISSUE (HENCE BACKORDERED HEADLIGHTS)

NHTSA complaint #11210566 — an unverified report by a vehicle owner.

at 72,000 miles Hickory, NC

EXTERIOR LIGHTING

BOTH REAR LIGHT ASSEMBLIES HAVE HAD ISSUES. DRIVERS SIDE WAS FIRST, BRAKE LIGHT STOPPED WORKING. REPLACED UNDER WARRANTY. PASSENGER SIDE BRAKE LIGHT AND PARKING LIGHT HAVE NOW STOPPED WORKING, JUST OUT OF WARRANTY. PROBLEM COMES AND GOES DEPENDING ON TEMPERATURE. I WOULD THINK THIS WOULD BE CONSIDERED A SAFETY ISSUE AND BE THE SUBJECT OF A RECALL SINCE IT IS WIDE SPREAD.

NHTSA complaint #11209404 — an unverified report by a vehicle owner.

at 120,000 miles Kansas City, KS

EXTERIOR LIGHTING

DRIVER'S SIDE, REAR TAIL LIGHT FAILED TO LIGHT WHEN PARKED, OR WHEN DEPRESSING THE BRAKE PEDAL. DEALERSHIP QUOTED JUST UNDER $800 TO REPLACE. HAD LIGHT REPLACED, AND THE SAME THING IS HAPPENING AGAIN. DEALER STATES THAT "LIGHTS GO OUT SOMETIMES."

NHTSA complaint #11206599 — an unverified report by a vehicle owner.

at 75,000 miles Fort Collins, CO

POWER TRAIN

AT 75,000 MILES I WOULDN'T EXPECT TO HAVE THIS MANY ISSUES OUT OF SUCH A NICE EXPENSIVE TRUCK... THE CHECK ENGINE LIGHTS COMES ON AND OFF AND IT PLEASES. WHEN THE CHECK ENGINE LIGHT IS ON THE REMOTE START DOESN'T WORK. THE TAIL LIGHTS WORK WHEN THEY WANT TO AND TO FIX A TAIL LIGHT JUST 1 IS $800.00. WHILE DRIVING ALL TYPES OF WARNINGS AND LIGHTS START COMING ON IN A RAPID WARNING ANNOYANCE. I'VE NEVER HOOKED A TRAILER TO THIS TRUCK AND IT KEEPS GIVING ME SOME TYPE OF TRAILER BRAKING SYSTEM WARNING. THE CRUISE CONTROL WORKS WHEN IT WANTS TO. BIG ISSUE!!!!! THE TRANSMISSION IS SLIPPING!!!!!!!!!!!! WHEN DRIVING IT WILL GIVE A HARD JERK AS IF IT'S HAVING TROUBLE SHIFTING. DOING THIS AT ANY SPEEDS, ANYTIME DURING ACCELERATING. SO MANY ISSUES OUT OF THIS TRUCK IT'S TO THE POINT WE ARE THROWING AWAY A TON OF MONEY ONTHIS THING!!!!!

NHTSA complaint #11204356 — an unverified report by a vehicle owner.

at 75,000 miles Fort Collins, CO

ELECTRICAL SYSTEM

AT 75,000 MILES I WOULDN'T EXPECT TO HAVE THIS MANY ISSUES OUT OF SUCH A NICE EXPENSIVE TRUCK... THE CHECK ENGINE LIGHTS COMES ON AND OFF AND IT PLEASES. WHEN THE CHECK ENGINE LIGHT IS ON THE REMOTE START DOESN'T WORK. THE TAIL LIGHTS WORK WHEN THEY WANT TO AND TO FIX A TAIL LIGHT JUST 1 IS $800.00. WHILE DRIVING ALL TYPES OF WARNINGS AND LIGHTS START COMING ON IN A RAPID WARNING ANNOYANCE. I'VE NEVER HOOKED A TRAILER TO THIS TRUCK AND IT KEEPS GIVING ME SOME TYPE OF TRAILER BRAKING SYSTEM WARNING. THE CRUISE CONTROL WORKS WHEN IT WANTS TO. BIG ISSUE!!!!! THE TRANSMISSION IS SLIPPING!!!!!!!!!!!! WHEN DRIVING IT WILL GIVE A HARD JERK AS IF IT'S HAVING TROUBLE SHIFTING. DOING THIS AT ANY SPEEDS, ANYTIME DURING ACCELERATING. SO MANY ISSUES OUT OF THIS TRUCK IT'S TO THE POINT WE ARE THROWING AWAY A TON OF MONEY ONTHIS THING!!!!!

NHTSA complaint #11204356 — an unverified report by a vehicle owner.

at 65,000 miles Kilgore, TX

EXTERIOR LIGHTING

BOTH REAR TAIL LIGHTS HAVE GONE OUT.

NHTSA complaint #11197341 — an unverified report by a vehicle owner.

at 51,000 miles Elko, NV

EXTERIOR LIGHTING

APPROXIMATELY 51,000 MILES ON VEHICLE: REAR PASSENGER TAIL LIGHT IS INOP. WE WERE ON A TRIP WHEN WE NOTICED, IF YOU TAP THE SIDE OF IT THE LIGHT WOULD COME ON FOR JUST A SECOND. LED STRIP FOR BRAKE LIGHT IS DEFECTIVE. REPLACEMENT COST IS ABOUT $800 DOLLARS. LOTS OF COMPLAINTS AND ONLINE FORUMS REGARDING THIS ISSUE. GMC REALLY NEED TO RESOLVE THIS ISSSUE. THESE RIGS COST WAY TO MUCH FOR THAT POOR QUALITY!

NHTSA complaint #11192777 — an unverified report by a vehicle owner.

at 51,000 miles Elko, NV

ELECTRICAL SYSTEM

APPROXIMATELY 51,000 MILES ON VEHICLE: REAR PASSENGER TAIL LIGHT IS INOP. WE WERE ON A TRIP WHEN WE NOTICED, IF YOU TAP THE SIDE OF IT THE LIGHT WOULD COME ON FOR JUST A SECOND. LED STRIP FOR BRAKE LIGHT IS DEFECTIVE. REPLACEMENT COST IS ABOUT $800 DOLLARS. LOTS OF COMPLAINTS AND ONLINE FORUMS REGARDING THIS ISSUE. GMC REALLY NEED TO RESOLVE THIS ISSSUE. THESE RIGS COST WAY TO MUCH FOR THAT POOR QUALITY!

NHTSA complaint #11192777 — an unverified report by a vehicle owner.

at 71,368 miles THE Dalles, OR

EXTERIOR LIGHTING

THERE IS A FLAW IN THE LED STRIP OF THE REAR TAIL LIGHTS. THE LED STRIP BREAKS OVER TIME DISABLING THE TAIL LIGHTS. THE TAIL LIGHT ASSEMBLY IS SEALED AND MUST EITHER BE REPLACED OR BROKEN INTO SO A JUMPER CAN BE SOLDERED ACROSS THE BREAK TO REPAIR THE TAIL LIGHT.

NHTSA complaint #11192167 — an unverified report by a vehicle owner.

at 52,000 miles Daytona Beach Shore, FL

POWER TRAIN

SUV SHUTTERING AND SHAKING WHILE IN MOTION ON CITY STREETS AND HIGHWAY

NHTSA complaint #11191809 — an unverified report by a vehicle owner.

at 52,000 miles Daytona Beach Shore, FL

UNKNOWN OR OTHER

SUV SHUTTERING AND SHAKING WHILE IN MOTION ON CITY STREETS AND HIGHWAY

NHTSA complaint #11191809 — an unverified report by a vehicle owner.