2015 GMC Denali Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2015 GMC Denali, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Exterior lighting624.0%
- Powertrain (other)520.0%
- Electrical416.0%
- Steering28.0%
- Brakes28.0%
- Body & structure14.0%
- Visibility14.0%
- Driver assistance14.0%
- Engine14.0%
- Fuel system14.0%
- Suspension14.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Exterior lighting
Reports naming headlights, tail lights, turn signals and other exterior lighting.
From owner reports, verbatim
BOTH BACK BRAKE LIGHT WORK INCONSISTANTLY. WHILE MOVING AND AT A COMPLETE STOP. LOCAL DEALERSHIP CHARGES AT MIN 1200 PER LIGHT TO FIX. SEEMS TO BE A COMMON PROBLEM WITH THE DENALI'S.
BOTH BREAKLIGHTS NO LONGER WORK DUE TO FAULTY ELECTRICAL PANEL.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
TL* THE CONTACT OWNS A 2015 GMC DENALI. THE CONTACT STATED WHILE DRIVING 35 MPH, THE VEHICLE DOWNSHIFTED AND WAS UNABLE TO UPSHIFT INTO THE HIGHER GEARS. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE CONTACT CALLED THE LOCAL DEALER STERLING BUICK GMC (5853 FRONTAGE RD. I 49 SOUTH, OPELOUSAS, LA 70570, (337) 942-3516) AND MADE THE DEALER AWARE OF THE FAILURE. THE VEHICLE HAD NOT BEEN DIAGNOSED NOR REPAIRED AS OF YET. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 148,000.
VEHICLE SEEMS TO BE STUCK IN 4WD, UNABLE TO SWITCH OUT OF IT. CANNOT TURN VEHICLE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
REAR DEFROSTER STARTED EMITTING SMOKE, OVERHEATED AND CRACKED REAR WINDSHIELD. PLEASE SEE EXISTING RECALL N192220470. ALTHOUGH VEHICLE NOT LOCATED IN CANADA, CAN ASSURE YOU THIS IS HAPPENING IN UNITED STATES AS WELL. *TR
WHILE THANKFULLY DRIVING IN THE SLOW LANE ON THE INTERSTATE IN ST. LOUIS MY STABILITY LIGHT CAME ON THE TRUCK THEN SLOWED DOWN ON ITS OWN THEN WENT INTO FOUR-WHEEL-DRIVE THEN REVVED UP TO 6000 RPMS THEN EVERY SERVICE LIGHT CAME ON ON THE DASH WHEN PULLING TO THE SIDE OF THE ROAD THE CAR THEN WOULD NOT DRIVE FORWARD IT STAYED IN NEUTRAL REGARDLESS OF GEARSHIFTING IT THEN BEGAN TO CYCLE THROUGH ALL OF THE SERVICE REQUEST FOR THE VEHICLE. AFTER HAVING TO HAVE THE VEHICLE TOWED TO THE NEAREST DEALERSHIP WHICH WAS THREE HOURS AWAY FROM MY HOUSE THEY INFORMED ME THE FOLLOWING MORNING THE POWER STEERING CONTROL GEARBOX HAD WENT OUT AND FRIED ALL THE ELECTRICAL'S INSIDE THE VEHICLE. THE VEHICLE HAS LESS THAN 39,000 MILES AFTER CONTACTING GMC THEY TOLD ME THERE WAS NOTHING THEY COULD DO THAT THERE WAS NOTHING ON A RECALL LIST FOR MY VEHICLES VIN NUMBER. AFTER DOING SOME RESEARCH I SAW THAT THERE WAS A RECALL FOR A VERY SIMILAR SITUATION IN 2018 IN SEPTEMBER. I HAVE VIDEOS OF THE VEHICLE COMPUTER SYSTEM MALFUNCTIONING IF REQUESTED. I JUST WANTED TO DOCUMENT AND FILE A COMPLAINT SO THIS DIDN'T HAPPEN TO SOMEONE ELSE AND CAUSE A SERIOUS WRECK , SINCE GMC HAS FAILED TO RECOGNIZE THIS SERIOUS OF AN ISSUE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
THIS HAS HAPPENED SEVERAL TIME IN THE CITY CROSSING AN INTERSECTION USUALLY AT SLOW SPEED BRAKING AND TURNING AND ALL THE SUDDEN I LOSE EVERYTHING. NO STEERING ELECTRICAL AND BRAKING. THE PARK ASSIST WILL SOMETIMES START GOING OFF LIKE CRAZY JUST BEFORE IT HAPPENS, BUT NOT ALL THE TIME. PUT IN PARK AND OPEN THE DOOR IT COMES BACK ON. THEN SAYS ROLL DOWN DRIVERS SIDE WINDOW AND THEN BACK UP. AT ON TIME I DID HAVE IT HAPPEN ON THE HIGHWAY. I WAS GETTING READY TO PASS AND GIVING IT GAS AND EVERYTHING SHUT DOWN FOR A SPLIT SECOND AND THEN TOOK OFF AGAIN. THIS PROBLEM IS GOING TO GET SOMEONE KILLED.
INTERMITTENT POWER STEERING FAILURE TURNING AT LOW SPEEDS. ALMOST HIT A CAR WHILE TURNING IN A ROAD DUE TO LACK OF POWER STEERING WORKING PROPERLY.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
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
THIS HAS HAPPENED SEVERAL TIME IN THE CITY CROSSING AN INTERSECTION USUALLY AT SLOW SPEED BRAKING AND TURNING AND ALL THE SUDDEN I LOSE EVERYTHING. NO STEERING ELECTRICAL AND BRAKING. THE PARK ASSIST WILL SOMETIMES START GOING OFF LIKE CRAZY JUST BEFORE IT HAPPENS, BUT NOT ALL THE TIME. PUT IN PARK AND OPEN THE DOOR IT COMES BACK ON. THEN SAYS ROLL DOWN DRIVERS SIDE WINDOW AND THEN BACK UP. AT ON TIME I DID HAVE IT HAPPEN ON THE HIGHWAY. I WAS GETTING READY TO PASS AND GIVING IT GAS AND EVERYTHING SHUT DOWN FOR A SPLIT SECOND AND THEN TOOK OFF AGAIN. THIS PROBLEM IS GOING TO GET SOMEONE KILLED.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
REAR DEFROSTER STARTED EMITTING SMOKE, OVERHEATED AND CRACKED REAR WINDSHIELD. PLEASE SEE EXISTING RECALL N192220470. ALTHOUGH VEHICLE NOT LOCATED IN CANADA, CAN ASSURE YOU THIS IS HAPPENING IN UNITED STATES AS WELL. *TR
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
BOTH LED BRAKE LIGHTS HAVE FAILED. IF YOU TAP THEM THEY WOK FOR A MINUTE BUT WHEN DRIVING THEY GO OUT AGAIN. THE SEAT VIBRATES TO ALERT YOU OF OBSTACLES BUT THE MOTOR IN THE SEAT ONLY WORK PERIODICALLY. THE REAR WINDOW WIPER HAS FAILED. THE YUKON HAS BEEN DRIVEN 3 YEARS AND 50K MI AND NOW NEEDS THOUSANDS OF DOLLARS IN REPAIRS BECAUSE OF THE DEFECTIVE PARTS USED.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
WHILE THANKFULLY DRIVING IN THE SLOW LANE ON THE INTERSTATE IN ST. LOUIS MY STABILITY LIGHT CAME ON THE TRUCK THEN SLOWED DOWN ON ITS OWN THEN WENT INTO FOUR-WHEEL-DRIVE THEN REVVED UP TO 6000 RPMS THEN EVERY SERVICE LIGHT CAME ON ON THE DASH WHEN PULLING TO THE SIDE OF THE ROAD THE CAR THEN WOULD NOT DRIVE FORWARD IT STAYED IN NEUTRAL REGARDLESS OF GEARSHIFTING IT THEN BEGAN TO CYCLE THROUGH ALL OF THE SERVICE REQUEST FOR THE VEHICLE. AFTER HAVING TO HAVE THE VEHICLE TOWED TO THE NEAREST DEALERSHIP WHICH WAS THREE HOURS AWAY FROM MY HOUSE THEY INFORMED ME THE FOLLOWING MORNING THE POWER STEERING CONTROL GEARBOX HAD WENT OUT AND FRIED ALL THE ELECTRICAL'S INSIDE THE VEHICLE. THE VEHICLE HAS LESS THAN 39,000 MILES AFTER CONTACTING GMC THEY TOLD ME THERE WAS NOTHING THEY COULD DO THAT THERE WAS NOTHING ON A RECALL LIST FOR MY VEHICLES VIN NUMBER. AFTER DOING SOME RESEARCH I SAW THAT THERE WAS A RECALL FOR A VERY SIMILAR SITUATION IN 2018 IN SEPTEMBER. I HAVE VIDEOS OF THE VEHICLE COMPUTER SYSTEM MALFUNCTIONING IF REQUESTED. I JUST WANTED TO DOCUMENT AND FILE A COMPLAINT SO THIS DIDN'T HAPPEN TO SOMEONE ELSE AND CAUSE A SERIOUS WRECK , SINCE GMC HAS FAILED TO RECOGNIZE THIS SERIOUS OF AN ISSUE.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
THIS HAS HAPPENED SEVERAL TIME IN THE CITY CROSSING AN INTERSECTION USUALLY AT SLOW SPEED BRAKING AND TURNING AND ALL THE SUDDEN I LOSE EVERYTHING. NO STEERING ELECTRICAL AND BRAKING. THE PARK ASSIST WILL SOMETIMES START GOING OFF LIKE CRAZY JUST BEFORE IT HAPPENS, BUT NOT ALL THE TIME. PUT IN PARK AND OPEN THE DOOR IT COMES BACK ON. THEN SAYS ROLL DOWN DRIVERS SIDE WINDOW AND THEN BACK UP. AT ON TIME I DID HAVE IT HAPPEN ON THE HIGHWAY. I WAS GETTING READY TO PASS AND GIVING IT GAS AND EVERYTHING SHUT DOWN FOR A SPLIT SECOND AND THEN TOOK OFF AGAIN. THIS PROBLEM IS GOING TO GET SOMEONE KILLED.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
UNDER NORMAL DRIVING CONDITIONS, MY CP4 FUEL INJECTION SYSTEM BLEW UP. I HAD TO HAVE IT TOWED TO THE NEAREST DIESEL REPAIR SHOP, $14.000 LATER , I WAS BACK UP AND RUNNING
Too few reports in this category for a page of its own — they appear in the full complaint list.
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
LETTER FROM SENATOR FEINSTEIN INQUIRY ON BEHALF OF CONSTITUENT IN REGARDS TO HAVING PROBLEMS WITH GMC SIERRA DENALI PICKUP 2015. *LD THE CONSUMER STATED THE VEHICLE HAS HAD MULTIPLE ISSUES WITH THE SUSPENSION, TRANSMISSION, AND ELECTRONICS. THE VEHICLE WOULD RIDE ROUGH AND THE STABILITY LIGHT WOULD ILLUMINATE. THE TRANSMISSION NEEDED TO BE REPLACED. THE ELECTRONIC DASH BLACKED OUT AND WOULD NOT FUNCTION, THE SETTIGNS SWITCHED ON THEIR OWN. THE VEHICLE DIED AND SHIFTED DANGEROUSLY. THE MANUFATURER WAS NOTIFIED. THE CONSUMER A FIX WAS UNAVAILABLE. UPDATED 08/09/2017*JS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .