2014 Gmc Sierra 1500 Engine Problems

Your 6.2L engine has experienced repeated valvetrain problems, requiring repairs twice in three months. The engine failed unexpectedly on the highway when the warning light came on, causing your truck to lose power and coast to a stop. This appears to be a documented issue that GM service technicians are aware of. Repair will likely involve complete valvetrain inspection and replacement of failed components.

Your engine failed at 140,274 miles due to lifter failure in 2 cylinders, causing a complete loss of power. The engine had to be replaced by a repair shop. This repair typically involves either replacing individual lifters or rebuilding/replacing the entire engine.

Your 2014 GMC Sierra 1500 stalled unexpectedly while stopped at a stop sign, with no warning lights appearing beforehand. The vehicle was towed home, but the dealer did not diagnose or repair the issue. You researched a potential recall but discovered your VIN wasn't covered. The stalling occurred around 81,000 miles and the manufacturer has not been notified of this failure. A proper diagnosis at a dealer is needed to identify the cause of the stalling, which could involve fuel system, ignition system, or engine control components.

Your engine's lifter on cylinder 4 failed completely, bending the intake valve push rod and disabling that cylinder. The check engine light came on and the engine began misfiring while you were driving normally, with no warning signs beforehand. The dealership confirmed this damage is related to the cylinder deactivation system and noted that the original lifters appear to be defective; they've seen this same failure repeatedly on cylinder 4 across both 5.3L and 6.2L engines. Fixing this requires replacing the lifters, though in severe cases metal debris from the failure can damage the camshaft, requiring a complete engine rebuild.

Your engine stalls when driving at low speeds. Your vehicle is showing fault codes for a stuck oil pressure solenoid and a camshaft timing problem. The engine may not be receiving proper oil pressure or the camshaft timing may be out of sync, both of which can cause stalling. Fixing this will likely involve replacing the oil pressure solenoid and possibly adjusting or replacing camshaft timing components.

The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving on the highway at 55 MPH, the vehicle lost automotive power and the steering wheel became stiff. The contact stated that the vehicle decelerated to 20 MPH, with several unknown warning lights were illuminated. The vehicle was taken to an independent mechanic where it was diagnosed, and the contact was informed that the engine had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 101,000.

The engine has 160,000 miles and just driving the camshaft and the lifters went out during normal driving. It showed no problems before hand. I’ve heard from multiple people that this is a big issue with the 6.2l gmc Sierra engines. The mechanic also stated it’s there biggest problem. The repair cost are $4,000 - $6000 dollars and the have to pull the whole engine and just fixing those two things. The cost of an engine is $7000 for a used with 100,000 miles and to me it would just happen again in around 60,000 miles or less. For a new engine non oem so an off brand it would cost $8,00 - $10,000 just for the engine. Almost as much as the truck cost not including the labor. This is completely unacceptable cost for repair for a common problem with this truck.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving 60 MPH, the check engine warning light illuminated. There was an abnormal knocking sound coming from the engine. The contact determined that the engine had seized. The contact stated that the failure was related to NHTSA Campaign Number 25V274000 (Engine and Engine Cooling). The vehicle was towed to the local dealer, where it was diagnosed and determined that the failure was due to the lifters, and there was low compression in the engine. The vehicle was not repaired. The vehicle was towed to an independent mechanic. The manufacturer was not contacted. The failure mileage was approximately 100,000.

Timing chain broke with no warning and seized engine. Complete engine failure. Engine had to be replaced. Engine was inspected and replaced by certified gm dealer.

Oil pressure pump failed to keep pressure despite regular maintenance.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving approximately 65 MPH, the vehicle lost motive power and shut off. The failure recurred on several occasions. There were no warning lights illuminated. The vehicle was taken to an independent mechanic and the contact was informed that the failure was due to the oil pump, which had gone into low-pressure mode and shut down the engine. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, and the contact was informed that the repairs were not covered under a recall. The manufacturer referred him to NHTSA. The approximate failure mileage was 186,000.

I had the a/c condensor and low pressure line replaced due to the cracked welds on condensor

My truck recently had an engine lifter fail when pulling out onto a very busy road. When I accelerated hard into traffic my check engine came on and I suddenly lost most of the engine power and it went into limp mode. I was almost rear ended when my truck nearly came to a stop. I was told it is a defective/poor design of the cylinder deactivation system from the dealer. Ther is no fix but to replace with the same lifter part number which was done and it also failed again 4 days later in a similar situation turning onto a road into traffic. My truck is now back in the shop to have lifters replaced twice in one weeks time.

AFM lifters are failing at a high rate. Had lifters replaced for $3k a year an half ago at 125k miles and they failed again at 149k miles just recently The problem is getting worse with the newer models

Cooling system radiator failure. GM has issued a factory bulletin on the known issue Bulletin No.: PI1513F. This could cause safety issues while traveling and have a radiator failure that is know by GM

engine has a little over 137k engine shut down vehicle towed mechanic reports approx. 1 gal of dexcool in oil pan. heads removed. mechanic reports valve failure, resulting in piston implosion and engine lock up. cost so far is at 7500.00

VEHICLE RADIATOR HAS LEAK AT 86K MILES. THERE IS KNOWN ISSUE W/RADIATOR AND THERMOSTAT IN THIS TRUCK LEADING TO TSB 15829 . MY TRUCK HAS THE SAME ENGINE/DRIVE-TRAIN/COOLING SYSTEM, BUT THE YEAR OF THE TSB ONLY APPLIES TO LD MODELS. GMC WILL NOT COVER REPAIR COSTS. GMC DEALER QUOTED ME $2900 FOR REPAIR.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE STALLED AFTER DEPRESSING THE ACCELERATOR PEDAL WITHOUT WARNING. THE CONTACT TOOK THE VEHICLE TO SIMPSON BUICK GMC OF BUENA PARK (6600 AUTO CENTER DR, BUENA PARK, CA 90621) FOR AN OIL LEAK AND THE GASKET WAS REPLACED. AFTERWARDS, THE VEHICLE WOULD SHUDDER WHEN REVERSING AT A LOW RATE OF SPEED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT TOOK THE VEHICLE BACK TO THE DEALER TO BE SERVICED; HOWEVER, THE FAILURE COULD NOT BE DUPLICATED. THE MANUFACTURER WAS NOTIFIED AND DID NOT ASSIST. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 408.

WHILE DRIVING ON A CITY STREET THE 2014 GMC SIERRA 6.2 L V8 LOST POWER AND STARTED RUNNING ROUGH AS APPROACHING AN INTERSECTION. I WAS ABLE TO STOP, AND REVERSE THE VEHICLE AWAY FROM THE INTERSECTION, TO GET OUT OF TRAFFIC. THE ENGINE LIGHT WAS FLASHING AND THE TRUCK SHUT DOWN, IT WAS UNABLE TO RESTART. THE TRUCK HAD UNDER 60,000 MILES ON IT AT THE TIME OF THE FIRST INCIDENT. IT WAS TOWED TO A GM DEALER SHOP FOR REPAIR. THIS FIRST INCIDENT TOOK PLACE IN AUGUST OF 2019. THE ROCKER ARM AND EXHAUST SPRING HAD TO BE REPLACED IN THE #2 CYLINDER, THE CYLINDER HEAD HAD TO BE REBUILT WITH A NEW HEAD. IN ADDITION THEY REPLACED 4 FUEL INJECTORS. IN DECEMBER OF 2019, A SECOND INCIDENT HAPPEN WHILE DRIVING ON A CITY STREET, THE ENGINE STARTED RUNNING ROUGH, I WAS CLOSE ENOUGH TO MY HOUSE TO GET IT HOME, PARK IT AND IT WAS TOWED TO A A CERTIFIED GM DEALER SHOP FOR REPAIR. THIS TIME IT HAD 61,752 MILES ON THE VEHICLE, THE NUMBER 5 SPRING BROKE. IT IS AT THE SHOP WAITING ON SPRING REPLACEMENT, THEY ARE IN BACKORDER, THERE IS NOT PROJECTED TIME THE REPAIR WILL BE COMPLETE.

I STARTED MY TRUCK AND NOTICED A HEAVY SMELL OF GASOLINE COMING FROM THE HVAC VENTS. I STEPPED OUT OF THE VEHICLE AND NOTICED A LARGE PUDDLE OF (FUEL) GASOLINE ON THE PAVEMENT AND A CONSTANT DRIP OF (FUEL) GASOLINE COMING FROM THE REAR OF THE MOTOR. I PROCEEDED TO TURN THE VEHICLE OFF AND CONTACT MY LOCAL GM DEALER FOR ASSISTANCE.

RADIATOR COOLANT LEAKING. EITHER A CRACK IN RADIATOR OR THE HOSES ARE LEAKING. VEHICLE ONLY HAS 50,000 MILES

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE THE VEHICLE WAS BEING SERVICED AT DOSSETT GMC CADILLAC (1058 W PINE ST, HATTIESBURG, MS 39401), THE DEALER INFORMED THE CONTACT THAT THE RADIATOR WAS DEFECTIVE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VIN WAS UNKNOWN. THE CONTACT HAD NOT EXPERIENCED A FAILURE.

RADIATOR LEAK. TOOK TRUCK TO SHOP TO FIND OUT WHY FLUID LEAKING UNDER TRUCK. UPON INSPECTION THEY FOUND THAT THE RADIATOR HAD FRACTURED. THE REPAIR PEOPLE FOUND THAT THERE HAD BEEN A RECALL IN 2014 FOR GMC SIERRA'S, BUT OURS WASN'T LISTED. A RADIATOR SHOULD NOT FAIL ON A 3 1/2 YEAR OLD VEHICLE. THE SPECIFIC SPECIAL COVERAGE # 15829 STATED THAT CYCLING OF THE THERMOSTAT MAY RESULT IN STRESS FRACTURES OF THE RADIATOR. THE REPAIR PEOPLE FELT THIS WAS WHAT HAPPENED. WE WERE FORTUNATE THAT WE WERE IN TOWN AND NOT TRAVELING. WE CONTACTED GMC DIRECTLY TO FILE A COMPLAINT AND THEY REFUSED TO DO ANYTHING ABOUT IT. ACTUALLY TOLD US TO FILE A COMPLAINT HERE. THE RESULTING BILL WAS $1,346.07. $648.17 IN PARTS, $633.45 IN LABOR. NEEDLESS TO SAY WHEN IT COMES TO BUYING ANOTHER TRUCK, THIS BRAND WILL NOT BE ON OUR LIST.

I PURCHASED THE VEHICLE PRE-OWNED CERTIFIED IN LATE MAY 2017. AC WENT OUT 1 WEEK LATER. VEHICLE HAS BUMPER TO BUMPER WARRANTY FOR 12 MONTHS OR 12K MILES. VEHICLE WAS TAKEN TO FOLSOM BUICK GMC AND FOUND "A/C CONDENSER LEAKING...RECOMMEND REPLACEMENT PARTS ON ORDER" PART NUMBER 84211191. I WAS ADVISED PART WAS ON BACK ORDER. GOING ON 45 DAYS WITH NO AC, AS THE PART IS STILL ON BACK ORDER. IN SACRAMENTO, CA WHERE DAILY IT IS 90 DEGREES WITH MANY DAYS OVER 100 DEGREES AND SOME DAYS OVER 105 DEGREES. AS THIS IS MY ONLY MEANS OF TRANSPORTATION IT IS A SAFETY CONCERN DUE TO THE AMOUNT OF HEAT ON THE BODY WHILE DRIVING FOR EXTENDED PERIODS OF TIME. I ALWAYS HAVE TO MAKE SURE I HAVE ENOUGH COLD WATER IN THE VEHICLE DUE TO THE FEAR OF PASSING OUT FROM DEHYDRATION.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING 35 MPH, THE FRONT DRIVER AND PASSENGER SEATS BECAME LOOSE AND BEGAN TO SHIFT INDEPENDENTLY. THE CONTACT COULD SMELL RADIATOR FLUID DUE TO THE FACT THAT THE RADIATOR CRACKED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT THE RADIATOR WAS CRACKED AND NEEDED TO BE REPAIRED. THE RADIATOR WAS REPAIRED. THE MANUFACTURER WAS MADE OF AWARE OF THE ISSUE AND STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER 14V446000 (SEATS). THE APPROXIMATE FAILURE MILEAGE WAS 50,000.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 65 MPH, THE VEHICLE VIBRATED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO A DEALER, BUT THE FAILURE WAS UNABLE TO BE DIAGNOSED. THE FAILURE RECURRED. THE DEALER REPLACED FOUR TIRES, BUT THE FAILURE RECURRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND THE CONTACT WAS REFERRED BACK TO THE DEALER FOR MORE DIAGNOSTIC TESTING. THE FAILURE WAS NOT REMEDIED. THE FAILURE MILEAGE WAS 9.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING AT A LOW SPEED ON AN INCLINE, THE VEHICLE ROLLED BACKWARDS AND THEN STALLED. THE CONTACT WAS ABLE TO RESTART THE VEHICLE. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TAKEN TO A DEALER WHO WAS UNABLE TO DIAGNOSE OR REPAIR THE VEHICLE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND STATED THAT THE VEHICLE FUNCTIONED AS INTENDED. THE FAILURE MILEAGE WAS 15,000. THE VIN WAS UNAVAILABLE.

#5 CYLINDER ROCKER ARM BROKE TOOK TO A DEALERSHIP IN MICHIGAN TO GET REPAIRED. PROBLEMS WITH ENGINE RUNNING, BEFORE ALL THIS HAPPENED I WAS GETTING 20/22 MPG ON THE HIGHWAY WHICH IS WHAT I TRAVEL MOSTLY, NOW SINCE THIS HAPPEN I ONLY GETTING 16/18 MPG ON THE HIGHWAY. MY DEALERSHIP IN MILWAUKEE WORKED WITH AN ENGINEER FROM GM AND THEY CLAIM EVERYTHING UP TO SPEC AND WON'T DO ANYMORE ON THE VEHICLE BUT YET SOMETHING HAS HAPPENED THAT I HAVE LOST ABOUT 4/6 MPG HIGHWAY OR $20 PER TANK WHICH WITH MY TRAVELING IS A LOT OF MONEY $400 MONTH. I AM VERY DISSATISFIED WITH GM AND THIS VEHICLE RIGHT NOW WHEN YOU PAY $50,000 + FOR A VEHICLE YOU DON'T EXPECT TO HAVE PROBLEMS WITHIN THE FIRST MONTH OF PURCHASE (BRAND NEW) AND THEN FOR GM NOT TO FIND OUT WHY THE DROP IN MILEAGE IS UNACCEPTABLE. *TR

INITIAL VEHICLE START WAS FINE. AFTER DROPPING MY SON AT HIS SUMMER PROGRAM, I RETURNED TO THE VEHICLE AND THE ENGINE WOULD NOT START. ALL OF THE INSTRUMENTS AND GAUGES POWERED ON, BUT WHEN I TURNED THE KEY, NOTHING HAPPENED. I TURNED THE POWER BACK TO THE OFF POSITION AND ATTEMPTED TO START AGAIN. I REPEATED THIS PROCEDURE EIGHT SEPARATE TIMES BEFORE THE TRUCK FINALLY STARTED. I AM FORESEEING A 2ND TRIP TO THE DEALER'S SERVICE DEPARTMENT SOON, BUT 1ST FOR THIS ISSUE. MY 1ST TRIP WAS DUE TO THE INTELLILINK INFOTAINMENT SYSTEM GOING BLACK. I TOOK THE TRUCK TO THE DEALER AND WAS TOLD THERE WAS A RECALL FOR THE RADIO MODULE TO BE REPROGRAMMED. THE REPROGRAMMING DID NOT WORK AND I HAD TO WAIT ANOTHER BUSINESS DAY FOR A NEW RADIO MODULE TO BE ORDERED AND INSTALLED. I AM BEGINNING TO DOUBT MY PURCHASE OF THIS VEHICLE. I HAVE OWNED IT LESS THAN 1 MONTH AND I AM ANTICIPATING ANOTHER SERVICE DEPARTMENT VISIT SOON. *TR

THE VEHICLE HAD BEEN PARKED FOR OVER THREE HOURS AT WHICH TIME IT WAS ENGULFED IN FLAMES. THE ENTIRE ENGINE COMPARTMENT CONSUMED BY FIRE. WE HAD TAKEN THE VEHICLE 2 WEEKS EARLIER TO A DEALER TO HAVE THE RECALL COMPONENT REPLACED BUT IT APPEARS THAT THE PROBLEM WAS NOT CORRECTED AND NOW WE HAVE A VEHICLE WHICH WAS ONLY 4 MONTHS OLD AS A PIECE OF WORTHLESS PILE OF METAL. GM HAS BEEN SLOW TO REACT TO THIS ISSUE AND HAS REQUESTED THAT WE FIRST HAVE OUR INSURANCE COMPANY LOOK AT THE VEHICLE VS. SEEM SEND THEM ONE TO LOOK AT THE THIS. *TR

I HAD MY TRUCK'S ECM REPROGRAMMED LAST FRIDAY (1/17) DUE TO RECALL #14V007, AND EARLIER THIS EVENING (1/24) THE CHECK ENGINE LIGHT CAME IN AND THE DIC SHOWED AN "ENGINE POWER IS REDUCED" MESSAGE. THE ENGINE RAN VERY SLUGGISH AND I PARKED IT AS GM RECOMMENDED TO DO IN THEIR RECALL LETTER. THIS IS THE SECOND TIME THIS HAS HAPPENED NOW. I THOUGHT THAT THE NEW SOFTWARE WAS SUPPOSED TO CORRECT THAT ISSUE? *TR