Home · 2014 GMC Sierra 2500 Hd · Complaints

What 131 owners told NHTSA about the 2014 GMC Sierra 2500 Hd

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (131)Crash / fire / injury (13)Lights (64)Electrical system (13)Steering (13)Transmission & drivetrain (13)Airbags (11)Engine (11)Body & structure (8)Suspension (5)Visibility & wipers (5)Fuel system (4)

Newest first · 131 complaints · page 3 of 6

Nov 3, 20151 injury

THE FACTORY SUPPLIED RUNNING BOARDS HAVE TREADS THAT FAIL TO PROVIDE ANY TRACTION FOR FEET WHILE ENTERING OR EXITING. THE TREADS NEED TO BE ROTATED 90 DEGREES AND MADE OF A SOFTER RUBBER WITH A DEEPER AND MORE AGGRESSIVE TREAD PATTERN. AS THEY EXIST THEY ARE VERY SLIPPERY ESPECIALLY WHEN WET OR FROZEN. GIVEN THE ADDED HEIGHT OF TRUCKS IT REQUIRES SOME USE OF THE RUNNING BOARDS TO ENTER/EXIT THE TRUCK. ESPECIALLY WHEN YOU ARE 68. AS DESIGNED AND MANUFACTURED THEY ARE ACTUALLY AN ACCELERANT IN SLIPPING FEET. I FEEL THEY ARE OF DEFECTIVE DESIGN AND MANUFACTURE AND COULD/SHOULD BE MADE SAFER. I FELL THREE TIMES IN THE PAST MONTHS WHILE EXITING MY SIERRA 1500.

NHTSA ODI 10788104

Nov 2, 2015Steering

IGNITION STEERING KEY LOCK SOUNDS LIKE IT'S BREAKING DURING THE TINE YOU TURN THE STEERING WHEEL TO UNLOCK KIT WHEN STOPPED. THIS HAS HAPPENED MORE THAN ONCE

NHTSA ODI 10787850

Nov 1, 2015Suspension

REGARDING 2014 GMC SIERRA 6 CYLINDER FULL SIZE PICKUP. VEHICLE VIBRATES AS IF RUNNING OVER RUMBLE STRIPS AT APX 1500 RPM. LOCAL GM SERVICE CENTER AND GM CORPORATE REPRESENTATIVE STATED ABOVE IS NORMAL VEHICLE OPERATION. LOCAL GM SERVICE CENTER CORRECTLY SUGGESTED THAT TRUCK BE DRIVEN FASTER OR SLOWER TO PREVENT VIBRATION OR THAT VEHICLE BE DRIVEN IN 5TH GEAR RATHER THAN OVERDRIVE 6TH GEAR TO PREVENT VIBRATION. IF VEHICLE IS NOR DRIVEN FASTER OR SLOWER TO GET OUT OF VIBRATION RANGE, THE TRUCK WILL VIBRATE ENDLESSLY. 2014 GMC SIERRA IS AN UNSAFE VEHICLE. NEEDING TO SPEED UP OR SLOW DOWN TO PREVENT VIBRATION SIGNIFICANTLY INCREASES RISK FOR MVA. NEEDING TO DRIVE IN 5TH GEAR RATHER THAN 6TH GEAR REDUCES GAS MILEAGE AS REPORTED TO NHSTA. LOCAL MECHANICS HAVE COMMENTED THAT THE ABOVE VIBRATION COMPLAINT IS COMMON TO 2014 6 CYLINDER GMC/CHEVY FULL SIZE PICKUP TRUCKS AND THAT THE VIBRATION MAY BE SECONDARY TO CYLINDER DEACTIVATION AND CHASSIS RIGIDITY. IT CERTAINLY WOUND BE A SHAME FOR A COLLISION TO OCCUR OR FOR A PEDESTRIAN TO GET RUN OVER BY A DRIVER OF A 2014 GMC/CHEVY FULL SIZE PICKUP WHO HAD TO SPEED UP OR SLOW DOWN TO REDUCE EXCESSIVE VIBRATION AT APX 1500 RPM

NHTSA ODI 10787566

Oct 13, 2015Electrical system

THE HEADLIGHTS ON THIS TRUCK PROVIDE INADEQUATE LIGHTING, INCLUDING BOTH LOW BEAMS AND HIGH BEAMS. ANY NIGHT DRIVING IS DIFFICULT DUE TO LIMITED VISIBILITY, THERE SIMPLY IS NOT ENOUGH ILLUMINATION TO SEE. CAN BE VERY DANGEROUS - ESPECIALLY AT SPEEDS ABOVE 35 MPH OR DURING PRECIPITATION. THE HEADLIGHT HAS A SEVERE DESIGN FLAW WITH GMS SAYS IS A SHUTTER SYSTEM. THIS TYPE OF DESIGN DOES NOT LEAVE ANY OPTIONS FOR SIMPLY CHANGING THE TYPE OF BULB - THE DESIGN IS ACTUALLY AT FAULT FOR THE POOR VISIBILITY. THE VISIBILITY PROBLEMS SIMPLY CANNOT BE FIXED WITH A DIFFERENT BULB TYPE DUE TO THE SHUTTER DESIGN TYPE. THE NEED FROM A NEW HEADLIGHT WILL SOLVE THE PROBLEM. MANY COMPLAINTS ARE BEING REGISTERED ONLINE RELATED TO THE VISIBILITY PROBLEM. THESE TRUCKS ARE NOT SAFE TO DRIVE AT NIGHT. IF THERE IS A STANDARD FOR MINIMUM HEADLIGHT ILLUMINATION FOR NIGHT TIME DRIVING, THIS MODEL HEADLIGHT NEEDS TO BE REVIEWED IF IT IS MEETING THE MINIMUM STANDARD. NOT SAFE, A DEFINITE PROBLEM THAT NEEDS ATTENTION.

NHTSA ODI 10781573

Sep 15, 2015Lights

TODAY FOR THE FIRST TIME I DROVE MY 2014 SIERRA TEXAS EDITION IN THE RAIN AT NIGHT.... WOW>>>>> I HAD TO STOP AND WAIT FOR THE RAIN DOWNPOUR TO LET OUT SO I COULD SEE WHERE I WAS GOING. NOT GOOD. DRIVING AT NIGHT IS VERY STRESSFULL AND EYE STRAINING TO THE POINT OF TAKING HEADACHE MEDICATIONS ONCE YOU ARE DONE DRIVING. ANY WAYT TO FIX THIS EXTREMELY DANGEROUS PROBLEM? THIS SHOULD BE CONSIDERED A SAFETY HAZARD TO DRIVERS AND ANY OTHERS ON THE ROAD. THIS ISSUE NEEDS TO BE ADDRESSED AND RESOLVED ASAP. AND GM STILL SAYS THERE IS NOTHING WRONG. SO WHY ARE THEY CHANGING THE DESING ON THE 2016'S TRUCKS

NHTSA ODI 10763908

Aug 15, 2015Lights

THE HEADLIGHTS IN THE VEHICLE ARE VERY DIM. THEY HAVE A PROJECTOR LIGHT IN THEM AND ONLY HAVE ONE BULB, THEY PROJECTOR MOVES WHEN SWITCHING BACK AND FORTH BETWEEN BRIGHT AND DIMS. THE PROBLEM IS THERE'S ONE LITTLE YELLOW CIRCLE OUT IN FRONT OF THE TRUCK ABOUT 30 FEET, THE BRIGHTS DO ABSOLUTELY NOTHING, AND THERE IS NO LIGHTING TO THE SIDES OF THE TRUCK. THERE IS NO LIGHT ON THE CURB AND MAKING A TURN IS NOT ONLY DIFFICULT BUT ALSO UNSAFE. THE VEHICLE HAS BEEN IN 3 TIMES TO FIX THIS ISSUE AND THEY HAVE DONE NOTHING TO HELP. I READ ONLINE THAT THERE IS AN UPDATE THAT SENDS MORE VOLTAGE TO THE HEADLIGHTS BUT THEY ALSO KNOW NOTHING ABOUT THAT. THE LAST TIME THEY SAID THEY WOULDN'T EVEN ALIGN THE LIGHTS BECAUSE I HAD PUT AFTERMARKET BULBS IN JUST TO BE ABLE TO SEE. THE FOG LIGHTS ARE TWICE AS BRIGHT AS THE HEADLIGHT, I'VE TOLD THEM THAT, CALLED THEIR CUSTOMER SERVICE NUMBER, TOLD THEM THAT, AND THEY DON'T SEEM TO CARE. I SEE ONLINE THAT IT IS A COMMON COMPLAINT AND SOMETHING NEEDS TO BE DONE ABOUT IT. ALSO THE ONES LIKE MINE WITH THE VIBRATING SAFETY SEAT GET LOOSE, ALSO A COMMON COMPLAINT, AND THEY WON'T COVER IT UNDER WARRANTY OR RECALL.

NHTSA ODI 10748846

Jul 20, 2015Airbags

WHILE SITTING PARKED IN MY DRIVEWAY WITH THE CAR IN PARK AND THE ENGINE IDLING, THE SIDE CURTAIN AIRBAGS ON MY 2014 GMC SIERRA DEPLOYED FOR NO IDENTIFIABLE REASON. GM HAS PROVIDED PART OF THE CRASH DETECTION REPORT DATA TO ME. THE VEHICLE EVENT SEVERITY STATUS: ROLLOVER INDICATES "YES". THE CDR ALSO SHOWS THAT THE VEHICLE'S SPEED WAS ZERO AND THE ENGINE WAS AT IDLE (512 RPM). AS NOTED, THE VEHICLE WAS PARKED ON A LEVEL SURFACE AND THERE WAS NO MOVEMENT OF THE VEHICLE OTHER THAN ANY MOVEMENT OF THE PASSENGERS IN THE VEHICLE. THE VEHICLE DID NOT ROLL AS IS EVIDENCED BY THE FACT THAT THERE IS NO EXTERNAL DAMAGE.

NHTSA ODI 10735304

Jul 10, 2015Lights

THE HIGHLIGHTS ON THE 2014 SIERRA SLE ARE A HAZARD TO TRY TO DRIVE WITH AT NIGHT ONLY LIGHT UP 30-40 FEET IN FRONT OF THE VEHICLE I GET MORE LIGHT FROM THE FOG LAMPS TO SEE BY

NHTSA ODI 10733210

Jun 11, 2015Lights

THE ORIGINAL HEADLIGHTS ARE TOO DIM WHEN IN THE LOW BEAM STATE. HIGH BEAMS ARE SLIGHTLY BETTER. A BRIGHTER COLOR WOULD BE A GREAT IMPROVEMENT.

NHTSA ODI 10724851

Jun 9, 2015Lights

I PURCHASED A 2014 GMC SIERRA IN NOVEMBER OF 2014 AND THE HEADLIGHTS ON OUR TRUCK GIVE YOU VERY LIMITED VISIBILITY, IT IS UNSAFE TO DRIVE AT NIGHT WITH HIGH BEAMS OR LOW BEAMS, I USE MY FOG LIGHTS TO HELP ME SEE BETTER BUT THEY DO NOT HELP MUCH ON DISTANCE. I TRADED IN A 2013 SILVERADO THAT HAD AWESOME HEADLIGHTS FOR THIS TRUCK AND RAISED MY PAYMENT 300$ ONLY TO HAVE A TRUCK THAT I CANT DRIVE AT NIGHT. SOMETHING NEEDS TO BE DONE ABOUT THIS. I HAVE READ MANY COMPLAINTS ON THIS ISSUE AND FEEL THAT GM NEEDS TO CORRECT IT AS SOON AS POSSIBLE BEFORE A SERIOUS ACCIDENT HAPPENS.

NHTSA ODI 10724191

Apr 22, 2015LightsVisibility & wipers

I PURCHASE THIS VEHICLE NOV. 2013, AND EVER SINCE I NOTICE THAT THE HEADLIGHT ON THIS VEHICLE DO NOT LIGHT THE ROAD PROPERLY, WHETHER YOU HAVE THEM IN LOW OR HIGH BEAM. THE DISTANCE OF THE LOW AND HIGH BEAM APPEAR TO BE THE SAME (AT TIMES IT SEEMS THE HIGHS) ARE AIMING SKYWARD. NOT TO LONG AGO I ALMOST RAN OVER A WOMAN AND A CHILD WHO WERE CROSSING A STREET OVER TO MY LEFT WHEN I WAS ATTEMPTING TO MAKE A LEFT TURN (THIS WAS A DARK AREA). LUCKILY I WAS GOING SLOW WHEN I WAS MAKING THE TURN AND WAS ABLE TO SEE THEM WHEN THE HEADLIGHTS HIT THEM AND CAME INTO VIEW. BY THIS STATEMENT I AM TRYING TO POINT OUT THAT THERE NO LIGHTING TO EITHER SIDE OF THE VEHICLE, I AM SURE (POSITIVE) THAT IF I WOULD HAVE BEEN MAKING A RIGHT TURN AN ACCIDENT WOULD HAVE HAPPEN. ARE THERE ANY RECALLS REGARDING THIS PROBLEM? IF NOT, I THINK THERE SHOULD ONE. BECAUSE IF SOMETHING LIKE THIS EXAMPLE I AM SUBMITTING TO YOU EVER HAPPENS, THE DRIVER WILL HELD RESPONSIBLE. AN IN MY CASE IT WILL BE BLAMED DUE TO MY AGE. *TR

NHTSA ODI 10712254

Apr 14, 2015Lights

HEADLAMPS DO NOT ADEQUATELY LIGHT UP ROAD. VERY UNSAFE. DEALER WON'T HELP. *TR

NHTSA ODI 10705514

Apr 8, 2015LightsVisibility & wipers

THE HEADLIGHTS ON THIS TRUCK PROVIDE INADEQUATE LIGHTING, INCLUDING BOTH LOW BEAMS AND HIGH BEAMS. ANY NIGHT DRIVING IS DIFFICULT DUE TO LIMITED VISIBILITY, THERE SIMPLY IS NOT ENOUGH ILLUMINATION TO SEE. CAN BE VERY DANGEROUS - ESPECIALLY AT SPEEDS ABOVE 35 MPH OR DURING PRECIPITATION. THE HEADLIGHT HAS A SEVERE DESIGN FLAW WITH GMS APPROACH AT A SHUTTER SYSTEM. THIS TYPE OF DESIGN DOES NOT LEAVE ANY OPTIONS FOR SIMPLY CHANGING THE TYPE OF BULB - THE DESIGN IS ACTUALLY AT FAULT FOR THE POOR VISIBILITY. THE VISIBILITY PROBLEMS SIMPLY CANNOT BE FIXED WITH A DIFFERENT BULB TYPE DUE TO THE SHUTTER DESIGN TYPE. MANY COMPLAINTS ARE BEING REGISTERED ONLINE RELATED TO THE VISIBILITY PROBLEM. THESE TRUCKS ARE NOT SAFE TO DRIVE AT NIGHT. IF THERE IS A STANDARD FOR MINIMUM HEADLIGHT ILLUMINATION FOR NIGHT TIME DRIVING, THIS MODEL HEADLIGHT NEEDS TO BE REVIEWED IF IT IS MEETING THE MINIMUM STANDARD. NOT SAFE, A DEFINITE PROBLEM THAT NEEDS ATTENTION. *TR

NHTSA ODI 10704545

Apr 5, 2015Lights

PURCHASED THIS VEHICLE JULY 2013. THE HEADLIGHTS ARE EXTREMELY INADEQUATE AND A HAZARD TO DRIVING. THE INADEQUATE LIGHTING HAS CAUSED ME TO RUN OFF THE ROAD ON MORE THAN ONE OCCASION DUE TO THE EXTREME CURVATURE OF THE ROAD AND THE LACK OF ADEQUATE LIGHTING TO SEE THE CURVE AHEAD. THE HEADLIGHTS ALSO DO NOT AFFORD YOU TIME TO SEE ROAD HAZARDS IN THE ROADWAY. GM NEEDS TO DESIGN A FIX FOR THIS DANGEROUS DEFECT. THE *TR

NHTSA ODI 10703822

Apr 1, 2015SuspensionBody & structure

THE CENTER CONSOLE WITH SHAKE EXCESSIVELY IF GOING 70-80 MPH. IT WILL ALSO SHAKE BAD GOING DOWN A MAIN ROAD I DRIVE ON DAILY DOING 45-55 MPH. THE TRUCK HAS HAD THE TIRES REBALANCED TWICE NOW WITH NO SOLUTION FOUND. THE TRUCK HAS BEEN IN THE SHOP OVER 20 DAYS ALL TOGETHER FOR OTHER VIBRATION ISSUES AS WELL. *TR

NHTSA ODI 10703208

Mar 26, 2015Lights

HEADLIGHTS ARE A SAFETY ISSUE WITH THIS TRUCK. CAN NOT SEE THE SIDES OF THE ROAD AND THE ROADWAY IS VERY DIM. I HAVE CONTACTED GM MANY TIMES WITH NO ANSWER TO THE PROBLEM. ONE TIME THEY SAID, TURN ON THE FOG LIGHTS WHEN YOU ARE ABOUT TO TURN A CORNER. *TR

NHTSA ODI 10701886

Mar 26, 2015Lights

HEADLIGHT OUTPUT IS HORRIBLE AT NIGHT TIME DRIVING ON THE HIGHWAY. IT IS FLAT OUT DANGEROUS. THE HEADLIGHTS ARE ONLY ADEQUATE FOR CITY DRIVING AT NIGHT. *TR

NHTSA ODI 10701960

Mar 22, 2015SuspensionBody & structure

I PURCHASED NEW IN 2014 A GMC SIERRA 4X4 I TAKE VERY GOOD CARE OF MY VEHICLES I PARK INSIDE A HEATED GARAGE AN WASH ONCE SOMETIMES TWICE A WEEK, INCLUDING UNDERCARRIAGE. IN JANUARY WHILE WASHING UNDERCARRIAGE I NOTICED THE COATING ON THE FRAME IS COMPLETELY COMING OFF THE FRAME WITH JUST THE SPRAY OF GARDEN HOSE. I NOTIFIED THE SERVICE DEPARTMENT AT UPSTATE CHEVROLET IN ATTICA AT MY LAST SERVICE MARCH 16 2015. THE DEALERSHIP WILL ALSO VERIFY HOW WELL I MAINTAIN MY VEHICLES. I AM NOW WAITING FOR A RESPONSE! IN THE MEAN TIME I WENT ON LINE TO SEE IF ANYONE ELSE IS HAVING SAME PROBLEM AND TO NO SURPRISE ALOT OF GMC TRUCK OWNERS ARE COMPLAINING OF THIS EXISTING PROBLEM AS WELL. PLEASE CONTACT ME. MY FAMILY AN I HAVE BEEN DEDICATED GM OWNERS AND I AM ASKING IF THIS FALLS UNDER THE LEMON LAW. THANK YOU FOR YOUR CONCERN. *TR

NHTSA ODI 10700933

Mar 20, 2015Lights

TL* THE CONTACT OWNS A 2014 GMC SIERRA. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE HEAD LAMP HIGH BEAMS WERE TURNED ON, BUT FAILED TO ILLUMINATE ADEQUATELY. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS UNKNOWN.

NHTSA ODI 10700683

Mar 15, 2015Lights

I WISH TO COMPLAIN ABOUT THE HEADLIGHTS ON THIS VEHICLE. THEY ARE REALLY TERRIBLE. LOW BEAM DOES NOT PROJECT FAR ENOUGH, AND HIGH BEAM SEEMS TO ILLUMINATE ROAD SIGNS AT A DISTANCE, BUT NOT ADEQUATE FOR THEIR PURPOSE. SEEMS AS THEY ARE MORE OF A SPOTLIGHT THAN A HEADLIGHT. THESE ARE THE MOST UNSAFE HEADLIGHTS I HAVE EVER HAD IN 43 YEARS OF DRIVING. AGAIN, THERE WAS NO ACCIDENT THANKFULLY, AND I JUST WISH TO FILE MY COMPLAINT AND CONCERN. THANK YOU. *TR

NHTSA ODI 10694324

Mar 9, 2015Lights

I PURCHASED 2014 GMC SIERRA 1500 ON OCTOBER 20TH 2014 AT THIS TIME IT HAS 1700 MILES ON IT. THE FIRST TIME OF MAYBE 3 TIMES THAT I DROVE THE VEHICLE AT NIGHT I WAS DISCOURAGED WITH THE HEADLIGHTS. I COULD BARELY SEE THE ROADWAY AND I COMMENTED TO MY FIANCE THAT THEY WERE TERRIBLE AND THAT I WAS AFRAID I WOULD HIT SOMETHING. I HAPPENED TO LOOK FOR RECALLS ON THE INTERNET AND NOTICED THAT THERE ARE MANY COMPLAINTS REGARDING THIS ISSUE. I AM SHOCKED THAT THERE HAS NOT BEEN ANYTHING TO CORRECT THE PROBLEM. I AM HESITANT TO DRIVE IT AT NIGHT. SOMETHING NEEDS TO BE DONE BEFORE SOMEONE GETS SERIOUSLY INJURED. *TR

NHTSA ODI 10692929

Feb 18, 2015Electrical systemLights

HEADLIGHTS ON THIS VEHICLE ARE TERRIBLE. VERY POOR ILLUMINATION FOR NIGHT DRIVING.THERE SHOULD BE A SAFETY RECALL FOR THESE HEADLIGHTS, PICKUP IS DANGEROUS TO DRIVE AT NIGHT.HEADLIGHTS LIGHT UP ROAD ABOUT 50-60 FEET AND OFFER VERY POOR SIDE VISION.HIGH BEAMS ARE USELESS AND SHINE UP IN THE TREES AND NOT ON THE ROAD.VEHICLE HAS PROJECTORS WITH ONLY A FLAPPER TO CHANGE HIGH/LOW BEAM.IHAVE BEEN DRIVING FOR 40 YEARS AND HAVE NEVER DRIVEN A VEHICLE WITH THIS POOR HEADLIGHT DESIGN. I CANNOT BELIEVE HEADLIGHT PASSED PHOTOMETRIC DESIGN CERTIFICATION (MAYBE THEY DID NOT) I HAVE COMPLAINED TO GMC BUT THEY SAY HEADLIGHTS ARE WORKING AS DESIGNED. HEADLIGHT ASSEMBLIES WERE REPLACED ONCE AND ADJUSTED SEVERAL TIMES BY DEALER.STILL NO REMEDY TO THE PROBLEM. *TR

NHTSA ODI 10684173

Feb 10, 2015Lights

HEADLIGHTS ARE INSUFFICIENT. DRIVING AT NIGHT AWAY FROM THE CITY IS DANGEROUS. BRIGHTER AND WIDER LIGHT PATTERNS ARE NEEDED. *TR

NHTSA ODI 10682667

Feb 9, 2015Lights

TL*THE CONTACT OWNS A 2014 GMC SIERRA. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE HEADLIGHTS WERE VERY DIM AND IMPAIRED THE VISION TO SEE THE ROAD. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE HAD NOT BEEN DIAGNOSED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 58. UPDATED 04/13/15*LJ THE CONSUMER STATED THE VEHICLE WAS REPAIRED ACCORDING TO BULLETIN PIT5374. THIS REQUIRED A BULB REPLACEMENT AND BCM REFLASH. UPDATED 10/30/2015 *JS

NHTSA ODI 10682314

Feb 6, 2015Fire

ON 12/12/14, MY HUSBAND CAME HOME AT APPROXIMATELY 2:00 PM AND APPROXIMATELY AN HOUR THE GARAGE WAS ON FIRE AND FIRE APPEARS TO HAVE STARTED IN THE TRUCK. GM CAME OUT AND INVESTIGATED WITH USAA BUT SINCE THERE IS NOTHING LEFT OF THE TRUCK THE CAUSE IS UNDETERMINED. THE ENTIRE HOUSE IS A TOTAL LOSS. THERE IS NO ROOF LEFT TO TRUCK. GM TRYING TO BLAME ON A REFRIDGERATOR CORD OR CORD IN WORKSHOP OR SPRINKLING SYSTEM. *JS

NHTSA ODI 10681745

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Working with the data? Download all 131 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2014 GMC Sierra 2500 Hd verdict →