2014 GMC SIERRA 1500 Engine Problems

Engine failed December 2024 at 140,274 miles. 2 cylinders failed due to lifter failure and had a total loss of power. Engine was replaced by a local shop.

hard shifting transmission and fluid smells burnt, shifts hard in the lower gears and reverse

Vehicle stalling at low speeds Oil pressure solenoid stuck fault and P0011 camshaft fault.

Truck completely shuts off at any speed going down the highway. Complete loss of power. Have to coast to side of road and restart vehicle.

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.

Mileage: 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.

Mileage: 100,000

I am the original owner of a 2014 GMC Sierra 1500 (VIN: [XXX] ) and began experiencing serious mechanical and electrical issues while the vehicle was still under warranty around 40,000 miles. These included engine RPM fluctuations at idle, vibrations under acceleration above 65 MPH, and intermittent misfiring — all symptoms that are now believed to be early indicators of defective lifters or valve train components. I also experienced repeated electrical failures including a rear turn signal malfunction due to melting/corroded taillight sockets, a thumping rear-end noise, differential knocking, and body panel issues (hood lifting at highway speeds). These were reported multiple times to authorized GMC dealers (Mike Haggerty GMC and Rizza GMC), but I was told there was no issue or no repairs were made. GM refused to assist when I escalated the issue in 2017 via a detailed email, despite all problems occurring within the warranty period. I’m now dealing with a persistent ticking sound from the engine and loss of power, which matches widespread reports of lifter failure in GM’s 5.3L/6.2L V8 engines. These failures pose both a mechanical and safety risk due to stalling, misfiring, and potential electrical fires (in my case, from a failed taillight socket). A class action lawsuit ([XXX], et al. v. General Motors LLC) has been filed regarding these known defects, yet GM has not issued a recall. I’m filing this complaint to add my case to the record and urge NHTSA to investigate these issues. I have full documentation of the original complaint and am willing to provide it upon request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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.

I know this is a well known issue with these trucks. Have had issues with power steering not working at low speeds which they claim it’s do to low voltage. This has happened numerous times and then on May 3rd I went to back into my driveway off a busy state route with hills on each end of the road. Put my hazard lights on let three vehicles pass and then I turned the wheel and gave it gas soon as the truck got into the middle of the road it shut off. Everything stopped working no hazard lights for about 10seconds and then I had to put the truck into park turn ignition key off and then back on to restart the truck. Again this is all do to low voltage from what everyone else has said with the same issue. There are no warnings what so every even the voltage meter is fine and the truck doesn’t hesitate at all it’s like someone disconnected the battery. I’m sure there is a way for GM to reprogram the pc for the voltage drop. At least have something like radio go out or ac, heat other than the engine and entire electrical shutting off. Something like this is going to get someone killed and GM should be held accountable for these problems.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving 50 MPH, the passenger’s side headlight became inoperable. The contact stated that several unknown warning lights flashed on the instrument panel. The contact pulled over to inspect the vehicle and discovered that the water pump had failed. Despite the failure, the contact managed to drive the vehicle home. The next day upon starting the vehicle, the check engine warning light illuminated and both engine fans began to run at full capacity. The contact called the dealer and made an appointment for a diagnostic test. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 160,000.

Mileage: 160,000

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.

Mileage: 186,000

Engine lifters keep going bad. The frame is rotting like I have never seen. Body is rusting out for second time. Blows lights every month. Rain getting in headliner and under rear seat. Ac breaks every year. All around worst fucking vehicle I have ever owned. Gmc will not do anything about this. I'm tried

What component or system failed or malfunctioned, and is it available for inspection upon request? How was your safety or the safety of others put at risk?: The truck just stalls and dies without warning, all lights go off inside and outside and all power is lost. From digging on the internet, I found out the problem is due to one or more rusty/defective connection to ground which stops current from flowing and therefore stalls the vehicle and turns everything off. When the truck stalls, power steering and power assisted breaks are not available and this makes the truck very difficult to guide/stop for most people, making it a significant safety risk to occupants as well as others as the likelyhood of a collision increases significantly. In addition, since all electric accessories are disconnected, warning/flashing lights can not be turned on to advise others that the truck has stopped. Has the problem been reproduced or confirmed by a dealer or independent service center? The problem is hard to reproduce because it happens at random times, it has happened to me at least 5 times in the last month or so. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? NO Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? NO warning messages or other symptom.

My lifters bent and my valves collapsed. I have had the vehicle repaired twice. No engine light warning. Also in Nov of 2022 oil is leaking into my cylinders. Common problem on several GM forums.

Going under 15mph, applying the brake causes the pedal to become stiff and lock up and not work. This has caused me to almost hit someone in traffic. I immediately got off the road and got my vehicle to a safe location off the road . Communicating with a dealer today to confirm possible recall issue or potential repairs.

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

The contact owns a 2014 GMC Sierra 1500. The contact stated that while her husband was driving approximately 65 MPH, the vehicle lost power steering functionality. The contact stated that an unknown warning light was illuminated and then disappeared. The contact stated that the loss of power steering functionality had increased over time. Additionally, the vehicle had started to stall at low speeds. The contact researched online and related the steering failure to NHTSA Campaign Number: 17V414000 (Steering). The contact noticed that the "Service Park Assist" light was illuminated when the vehicle stalled. The contact had taken the vehicle to a local dealer who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 215,000.

Mileage: 215,000

the catalytic converter failed at 110,000 miles and the brake boost hydraulics failed to work properly at 115,000. The electronic stability control started acting erratically at 115,000 miles also.

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

My vehicle recently started "shuttering" while driving. Service report says it is a "common GMC issue with the Torque Converter", $3200. They also reported a "substantial leak" in the radiator, and again, says it is a very common fault of GMC Trucks. And another $2700. If these conditions are as common as they indicate, why are there no corrective measures?

Stability control Truck felt no power and on off on again It happened suddenly How to fix?

It turned off while driving on freeway I immediately put on N and start back up. It also pulls back as I’m driving normal 35mph. My Rpm gaug goes up to 3 while driving down hill and locks

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

From time to time the vehicles power system will surge, blink, and generally act up. The priblem is intermittent. The check engine light will come in then go off, the engine has completely cut off several times while driving, the transmission acts up, radio will turn off, 120v outlet will turn off, occasionally the vehicle will fun for 5-15 seconds after being turned off and then sputter off. And 95% of the time the truck is absolutely fine.

While passing a vehicle I lost all electrical power which in turn caused the vehicle to lose power. This same thing has happened several times at low speeds. I have the vehicle scheduled for July 2 to get looked at. The engined revved extremly high and it seemed like the transmission went into neutral. It then restarted. I had to roll the driver's window down and got a stabili Trak light that came on after the incident.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving the vehicle, the steering wheel would violently shake and vibrate before the vehicle shut-off. Later the vehicle was restarted and operated as normal. The vehicle was taken to the local dealer who was unable to determine the cause of the failure. The manufacturer was also notified of the failure. The failure mileage was 30,000.

Mileage: 30,000

THE TRUCK SHUTS OFF WHILE DRIVING WHICH DISABLES THE POWER STEERING, ENGINE AND POWER BRAKING. THE ELECTRICAL SYSTEMS SEEMS TO REBOOT AND TURN BACK ON AFTER A SECOND OR TWO. THIS ALSO HAPPENS OCCASIONALLY WHILE DRIVING AT SLOWER SPEEDS AND TURNING THE STEERING WHEEL OR AFTER HITTING THE TURN SIGNAL. I HAVE HAD THE ENTIRE ELECTRICAL SYSTEM AND ENGINE SHUT OFF WHILE DOING 50MPH ON THE HIGH JUST BECAUSE I TURNED MY TURN SIGNAL ON. THIS HAPPENS EVERY 4 WEEKS OR SO. YOU CAN TELL IT IS ABOUT TO HAPPEN WHEN THE HEADLIGHTS START DEEMING WHEN TAPPING THE BRAKES OR USING THE TURN SIGNAL. IT USUALLY HAPPENS WHEN THE TRUCK IS IN MOTION. IT HAS HAPPENED IN ALL TEMPERATURES. AFTER IT HAPPENS THE CONSOLE STATES "STABLITRAK IS DISABLED".

Mileage: 64,000

I OWN A 2014 GMC SIERRA AND THE AIR CONDITIONING CONDENSER HAS GONE OUT. THIS SHOULD BE A RECALL SINCE SO MANY GMC & CHEVROLET ARE HAVING THE SAME PROBLEM AND NO HELP IS BEING OFFERED TO US. WHAT A DISAPPOINTMENT FROM GMC. IF I WOULD OF BEEN NOTIFIED OF THIS DEFECT I WOULD HAVE NEVER PURCHASED THESE TRUCK. NOW I'M DRIVING AROUND IN 110 DEGREES WITH MY LITTLE SON. RECALL AND FIX THIS.

MY VEHICLE TURNED COMPLETELY OFF AND IT PUT MY BREAKS TO THE FLOOR AT 26 MPH. MY STEERING LOCKED ALSO AS IF I TURNED IT OFF. PRIOR TO THIS HAPPENING 3 MONTHS MY STEERING COLUMN HAS A POPPING FEELING. NOT NOISE. FEELING. WHEN I TOOK IT TO THE SHOP, THEY READ THE CODE AND IT SAID SOMETHING ALONG THE LINES OF COMMUNICATION ERROR. DEALERSHIP COULDN'T FIND ANYTHING WRONG, TOOK APART STEERING COLUMN NOTHING WAS LOOSE AND POPPING STOPPED ALSO HAD BATTERY REPLACED 7 MONTHS PRIOR AND NO BAD CONNECTIONS. RECEIVED MY TRUCK BACK, WAS GOOD UNTIL A WEEK AGO THE POPPING FEELING, IS BACK.

Mileage: 82,500

RADIATOR HAS MICRO-HOLES WHICH LEAKS COOLANT. ENGINE CODE P0455 WITH NO GM MECHANICS ABLE TO FIND A SOLUTION TO THE ENGINE CODE. *TR

Mileage: 50,000

RADIATOR IS LEAKING FROM THE TOP WITH ONLY 67,000 MILES AND TRANSMISSION SHIFTS HARD AND WHEN U LET OFF GAS WHILE DRIVING ABOUT 55 THE RPMS GO DOWN TO IDLE THEN START BOUNCING UP 500RPMS THEN BACK DOWN. THEN EVENTUALLY WILL FIND A GEAR TO GO IN

Mileage: 67,000

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.

Mileage: 86,000

BEGAN RUNNING ROUGH BAD LIFTERS. ALSO INTERIOR IS BEGINNING TO RUST. HHEADLIGHTS ARE TERRIBLE IT AKA NEARLY IMPOSSIBLE TO SEE.

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.

Mileage: 408

INTERMITTENT STALLING, ( COMPLETE SHUT DOWN AT FREEWAY SPEEDS). NO ENGINE, NO POWER STEERING OR BRAKES, WINDOWS WILL NOT OPERATE, NO EMERGENCY FLASHERS, NO DASH RE-OUT, WILL NOT TURN OVER. HAPPENS AT ANY TIME WHILE IN MOTION. HAS PLACED MYSELF, MY WIFE & OTHER DRIVERS IN DANGER NUMEROUS TIMES.

Mileage: 98,000

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 65 MPH, THE SERVICE STABILITRAC WARNING INDICATOR ILLUMINATED, THE DOOR LOCKS ACTIVATED INDEPENDENTLY, AND THE POWER STEERING FAILED. ADDITIONALLY, THE VEHICLE INDEPENDENTLY TURNED OFF AND ON WITHIN A FEW SECONDS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED, BUT THE MECHANIC WAS UNABLE TO RETRIEVE A FAULT CODE. THE VEHICLE WAS NOT REPAIRED. THE DEALER AND MANUFACTURER WERE NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 88,124.

Mileage: 88,124

I'VE ALWAYS LIKED YOUR GMC TRUCKS BUT MOSTLY BEEN A FORD OWNER SO THIS DECEMBER I BOUGHT A 2014 GMC SIERRA 1500 WITH 98,000 MILES... REALLY LOVE THE TRUCK BUT THEN START BY HAVING PROBLEMS.. FIRST MY PASSENGER WINDOW WOULDN'T ROLL DOWN ALL THE WAY ..GOT THAT FIXED..THEN MY REAR DRIVERS DOOR LOCK DON'T WORK..AND THE BIG ONE MY AC CONDENSER HAS A LEAK ($1500 FIX)WHICH SUPPOSEDLY IS A COMMON PROBLEM WITH THIS VEHICLE..WHICH I'M JUST SO DISSATISFIED..I WOULD REALLY APPRECIATED TO HAVE THESE PROBLEMS FIX FOR FREE!!! FOR I AM REGRETTING GOING GMC.

Mileage: 100,000

WHILE SLOWING DOWN AT TRAFFIC TRUCK FELT LIKE IT WAS SUPER HEAVY AND KEPT GOING, BRAKE PEDAL GOT HARD AND COULD NOT PRESS DOWN. AC WENT OUT ON ME TWICE DO TO BAD COMPRESSOR AND HAD TO REPAIR AT DEALER. TRANSMISSION KNOCKS WHEN SLOWING DOWN AND HARD SHIFTS LIKE ITS GOING TO BREAK. ALSO VISIBILITY IS POOR ON VEHICLE WHEN DRIVING AT NIGHT AS THE LIGHT ARE VERY DIM. HAD TO BUY ALTERNATE LIGHTS BUT STILL DIM.

Mileage: 119,000

I PURCHASED MY VEHICLE BRAND NEW IN ORDER TO AVOID UNEXPECTED EXPENSES THAT ONE SOMETIMES INQUIRE WHEN WE PURCHASE A USED VEHICLE. HOWEVER, THE TRUCK HAS GIVEN ME NOTHING BUT MECHANICAL ISSUES I'VE HEAD ENGINE POWER LOSS PROBLEMS, HAVE GONE THROUGH TWO AIR CONDITIONER MAJOR ISSUES, RADIATOR GONE BAD, TRANSMISSION GO OUT AND THE MOST RECENT MY ROOF STARTED TO LEAK. AS I DID MORE RESEARCH I CAME TO DISCOVER THAT I AM NOT THE ONLY CUSTOMER IN THIS PREDICAMENT THERE ARE SEVERAL OTHERS. I'M REACHING OUT TO FOR ASSISTANCE IN REGARDS TO THESE MATTERS, SOMETHING HAS TO BE DONE GMC HAS TO TAKE RESPONSIBILITY FOR FAULTY VEHICLES IF THAT'S IS THE CASE. THEY ONLY GIVE THE GO AROUND TO CUSTOMERS LIKE MYSELF THAT ON TOP OF HAVING A CAR PAYMENT WE HAVE TO SOMEHOW PAY HIGH MECHANICAL BILLS FOR ISSUES THAT SHOULD NOT BE ACCRUING TO NEW VEHICLES.

THE TRUCK DIES AT ANY MOMENT. STABILITY TRACK SYSTEM WARNING POPS UP IN THE LITTLE SCREEN AND THE STEERING WHEEL IS BLOCKED WHEN THIS HAPPEN. AFTER THESE TO THINGS HAPPENS THE TRUCK SHUT DOWN. SOMETIMES, AFTER A FEW MINUTES THE TRUCK COMES BACK TO NORMAL. THIS HAS HAPPENED TO ME FOR LIKE 10 TIMES IN A PERIOD OF LIKE 15 MONTHS. I HAVE TAKEN TO THE DEALER LIKE 6 TIMES AND THEY HAVEN'T FOUND THE PROBLEM. THEY HAVE CHANGE SOME WIRES FROM THE BATTERY. THEY HAVE REPROGRAM THE SOFTWARE AND NOTHING I STILL HAVE THE SAME PROBLEM. THE TRUCK DIES AT ANY MOMENT. ALL OF THIS HAPPEN WHEN I AM DRIVING THE TRUCK MOST OF THE TIMES AT LOW SPEED AND WHILE TURNING TO THE LEFT OR RIGHT EXCEPT LIKE TWO TIMES THAT OCCURRED WHILE I WAS DRIVING IN THE HIGHWAY. THE MECHANICS IN THE DEALER HAVE DONE ALL KIND OF DIAGNOSTIC THAT THEY HAVE BUT THEY COULD NOT DUPLICATED THE PROBLEM SO THE ANSWER THAT I GET EVERY TIME IS THAT EVERY IS FINE AND THAT THEY COULDN'T DUPLICATED THE PROBLEM.

Mileage: 80,931

THE TRUCK WILL COMPLETELY TURN OFF, LOSS OF ELECTRICAL, POWER STEERING, BRAKING - EVERYTHING. FIRST TIME WAS ON HIGHWAY30MPH IN TRAFFIC 2ND TIME HIGHWAY GOING 45-50 IN TRAFFIC & TODAY IN PARKING LOT, TURNING IN TO DROPPOFF LANE AN CHILDS SCHOOL. NO STEARING AND HIT THE CURB.

Mileage: 79,313

WHILE TAPPING THE BRAKES, THE VEHICLE'S HEADLIGHTS WILL DIM OCCASIONALLY. 2 TIMES NOW WHILE TAPPING THE BRAKES, THE ENTIRE DASHBOARD (INCLUDING THE TOUCHSCREEN) TURN OFF AND RESTART. THE FIRST TIME WAS TRAVELLING ON A HIGHWAY AND THE SECOND TIME WAS ON MY DRIVEWAY, I APPLIED THE BRAKES AND THE ENTIRE CAR SHUT DOWN, INCLUDING THE POWER STEERING, POWER BRAKES, AND ENGINE. THAT TIME I ROLLED OUT OF MY DRIVEWAY AND INTO THE ROAD. I WAS LUCKY NO ONE WAS COMING

Mileage: 25

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

Mileage: 45,000

WHILE TAPPING THE BRAKES, THE VEHICLE'S HEADLIGHTS WILL DIM. OCCASIONALLY, WHILE TAPPING THE BRAKES, THE ENTIRE DASHBOARD (INCLUDING THE TOUCHSCREEN) TURN OFF AND RESTART. ON 6/18/18, WHILE TRAVELLING ON A HIGHWAY AT 40 MILES AN HOUR AND APPROACHING A RED LIGHT, I APPLIED THE BRAKES AND THE ENTIRE CAR SHUT DOWN, INCLUDING THE POWER STEERING, POWER BRAKES, AND ENGINE. I HAD TO PLACE THE CAR INTO NEUTRAL AND TURN IT BACK ON IN ORDER TO BRAKE IN TIME.

Mileage: 36,500

ON MAKING A TURN AT LOW SPEED, MY ENGINE HAS CUT OUT COMPLETELY. I HAD FULL LOSS OF ACCELERATION, POWER STEERING ,AC, RADIO. I PUT THE TRUCK IN NEUTRAL AND RESTART THE ENGINE TO GET TO SAFETY. THIS HAS OCCURRED 3 TIMES IN THE LAST 20 DAYS.TWICE IN CITY TRAFFIC, ONCE ON THE HIGHWAY, TURNING OFF FOR GAS. THE "SERVICE STEERING ASSIST" LIGHT APPEARED. I TOOK THE TRUCK FOR A FULL DIAGNOSTIC AT A LOCAL ELECTRIC REPAIR SHOP, FOR $170.00. THE TECH FOUND NOTHING AFTER HOOKING MY TRUCK TO HIS COMPUTER. THE DAY I RETRIEVED MY TRUCK FROM THE ELECTRICAL SHOP, I STOPPED IN WALMART FOR GROCERIES. MY KEY FOB WOULD NOT LOCK OR UNLOCK MY DOORS. I MANUALLY UNLOCKED THE TRUCK TO DETERMINE THAT THE TRUCK WOULD NOT START AT ALL. NO PANEL/ INTERIOR LIGHTS, NO RESPONSE IN IGNITION,NO AUTOMATIC UNLOCKING, THE TRUCK WAS COMPLETELY DEAD. ROADSIDE SERVICE CAME TO TOW IT, AND THE TRUCK WAS JUMPSTARTED FROM HIS BATTERY PACK. THE KEY FOB BEGAN TO WORK, UNLOCKING,ETC. I TOWED THE TRUCK HOME. I HAVE VIN CHECKED MY TRUCK AND THERE ARE NONE BUT I BELIEVE MY VEHICULAR FAILURE REFERS TO GM PART 573 SAFETY RECALL 17V-414 REGARDING THE LOSS OF EPS. A SECONDARY RECALL WHICH MAY APPLY IS GM# 14V26000 RE STEERING LINKAGES, TIE ROD ASSEMBLY.AS THE "STEER ASSIST' ALERT WAS WHAT I SAW. I HAVE THE WORK INVOICE FROM THE ELECTRICAL SHOP, IF NEEDED.

Mileage: 40,000

I TEMPORARILY HAD NO CONTROL OVER THE VEHICLE CAUSING ME TO HAVE AN ACCIDENT. WHILE DRIVING DOWN A RESIDENTIAL STREET APPROACHING A STOP SIGN INTERSECTION I MERGED INTO THE CENTER OF ST TO PASS A TRASHCAN AND IN THE PROCESS OF RETURNING TO MY CORRECT POSITION ON THE ROAD I SUDDENLY HAD NO STEERING. PANICKING FROM THE LOSS I PRESSED MY BRAKES AN ATTEMPT TO BRING VEHICLE TO A STOP BUT WAS UNSUCCESSFUL BECAUSE THE TIRES BEGAN A SLIDE ONCE NOTICING THE TRACTION LOSS I PROCEEDED TO RELEASE BRAKES AND REAPPLY IN HOPES OF GAINING TRACTION THE BRIEF RELIEF FROM BRAKES CAUSED THE VEHICLE TO REGAIN TRACTION AND WHILE I STILL HAVE NO CONTROL OVER STEERING, THE VEHICLE JERKS TOWARDS THE RIGHT SIDE OF THE ROAD AND THE BRAKES BEING REAPPLIED THE VEHICLE CONTINUES TO SLIDE OFF PAVEMENT MAKING CONTACT WITH STOP SIGN AND TELEPHONE POLE.

FIRST INSTANCE: (THIS ISSUE HAPPENED THREE TIMES IN ONE DAY BEFORE BEING ABLE TO BE REPAIRED) WITHOUT WARNING THE VEHICLE LOST ALL POWER AND THE MOTOR DIED WHILE TRAVELING AT APPROX. 35MPH FOR SEVERAL SECONDS. WHEN IT POWERED BACK UP EVERYTHING WAS RESET AS IF THE BATTERY HAD BEEN DISCONNECTED. THE DEALERSHIP FOUND A "LOOSE GROUND WIRE" UNDERNEATH THE DASHBOARD AND ATTRIBUTED THE OCCURRENCE TO THIS. SECOND OCCURRENCE: (LESS THAN A MONTH LATER AND HAPPENED TWICE WITHIN A FEW MINUTES) WHILE TRAVELLING ON THE EXPRESSWAY AT APPROX. 70MPH AND AGAIN WITHOUT WARNING THE VEHICLE LOST ALL POWER AND THE MOTOR DIED FOR SEVERAL SECONDS. WHEN IT POWERED BACK UP EVERYTHING WAS RESET AS IF THE BATTERY HAD BEEN DISCONNECTED. THIS HAPPENED AGAIN WHILE EXITING THE HIGHWAY JUST MOMENTS LATER AT A MORE MODERATE SPEED, AGAIN WITH ZERO WARNING. DEALERSHIP NOW STATES THE PROBLEM IS WITH THE POSITIVE BATTERY TERMINAL WIRE & HARNESS.

Mileage: 65,000

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.

Mileage: 62,820

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.

Mileage: 41,720

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING 5 MPH, THE STEERING WHEEL BEGAN TO STEER BACK AND FORTH INDEPENDENTLY WITHOUT WARNING. THE CONTACT STATED THAT THE ENGINE STALLED WHILE THE FAILURE WAS OCCURRING. THE VEHICLE WAS ABLE TO RESTART, BUT THE FAILURE RECURRED TWICE. THE VEHICLE WAS TAKEN TO AN UNKNOWN DEALER, BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS APPROXIMATELY 55,000.

Mileage: 55,000

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 ALSO SMELLED RADIATOR FLUID DUE TO THE FACT THAT THE RADIATOR CRACKED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DETERMINED THAT NOTHING WAS WRONG WITH THE VEHICLE. THE VEHICLE WAS NOT 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.

Mileage: 50,000

WHEN DRIVING RECENTLY, MY CHECK ENGINE LIGHT STARTED FLASHING ALONG WITH MY STABILITRAK LIGHT COMING ON. THE VEHICLE STARTED VIBRATING. THE VIBRATING WAS ESPECIALLY ROUGH WHILE IDLE. THE VIBRATION WAS ALSO ROUGH WHILE IN LOWER GEARS AND WHILE BRAKING. WHEN BROUGHT IN FOR SERVICE I WAS TOLD IT WAS A CORRODED IGNITION COIL. THIS IS THE SECOND TIME THIS HAS HAPPENED. I BOUGHT THE VEHICLE NEW AND IT CURRENTLY HAS ABOUT 37,000 MILES ON IT.

Mileage: 37,000

STEERING WHEEL SPRINGS/SNAPS (HARD) IN THE OPPOSITE DIRECTION THAT THE WHEEL IS BEING TURNED AND STEERING CONTROL IS LOST. WHEN THIS DOES NOT SHUT THE ENGINE OFF, THE ONLY WAY TO REGAIN STEERING CONTROL IS TO RESTART THE VEHICLE. WHEN THIS DOES CAUSE THE ENGINE TO SHUT OFF THE STEERING IS RESTORED WITH THE RESTART. THE STABILI TRAK INDICATOR APPEARS JUST FOR AN INSTANT ON THE DIC WHEN THIS HAPPENS. NOTE: THIS IS NOT THE 'SERVICE STABILI TRAK' INDICATOR BUT MORE LIKE STABILI TRAK HAS BEEN ACTIVATED INDICATOR. THIS HAPPENED FIRST IN REVERSE WHILE BACKING INTO A PARKING SPOT. (THREE TIMES IN REVERSE). THEN IT STARTED HAPPENING IN DRIVE, TWICE WHILE PULLING OUT FROM A STOP SIGN AND ONCE WHILE DOING 15-20 MPH TURNING ONTO A SIDE STREET. THE 15-20 MPH TURNING INSTANCE CAUSED THE ENGINE TO SHUT OFF, STEERING BECAME NON EXISTENT FOR AN INSTANT AND THEN VERY VERY HEAVY. I CROSSED THE OTHER LANE OF TRAFFIC AND ALMOST LANDED IN THE DITCH. THE TRUCK HAS BEEN AT THE DEALERSHIP TWICE FOR A TOTAL OF 14 DAYS, BOTH TIMES 'CANNOT DUPLICATE' WAS THE RESULT. NO CODES ARE BEING GENERATED FROM THESE INSTANCES. CAUSE IS UNKNOWN. LOOSE VOLTAGE OR HIGH RESISTANCE TO GROUNDS MAYBE. THIS HAS HAPPENED IN HOT AND COLD WEATHER, RUNNING AC OR HEATER OR NEITHER. THERE IS NO PATTERN. PLEASE HELP.

Mileage: 34,000

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 70 MPH, THE VEHICLE SLOWED AND THE ABS, BRAKE, CHECK ENGINE, AND OTHER INDICATORS ILLUMINATED. THE BRAKE PEDAL TRAVELED TO THE FLOORBOARD. THE VEHICLE WAS COASTED TO THE SIDE OF THE ROAD AND WAS LATER DRIVEN HOME. THE VEHICLE WAS TAKEN TO THE DEALER, BUT THE CAUSE OF THE FAILURE COULD NOT BE DIAGNOSED. THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE, BUT DID NOT RESPOND. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 29,000.

Mileage: 29,000

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.

Mileage: 9

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING 25 MPH AND MAKING A LEFT OR RIGHT TURN, THE VEHICLE JERKED VIOLENTLY AND CAUSED THE STEERING WHEEL TO BECOME ERRATIC. THE FAILURE RECURRED NUMEROUS TIMES. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 67,800.

Mileage: 67,800

THE PROBLEM STARTED WHILE BACKING A TRAILER AND TURNING. THE STABILTRACK LIGHT CAME ON AND THE STEERING WHEEL JERKED OUT OF MY HAND. IT HAPPENED A FEW MORE TIMES AND THEN THE TRUCK DIED. LATER WHILE DRIVING THE STABILITRACK LIGHT WOULD FLASH ON AND THE DIC WOULD GO BLACK. THE A.C. WOULD ALSO GO OUT AND COME BACK ON. IT WOULD ALSO DO THIS WHEN TURNING ON THE SIGNAL LIGHT OR STEPPING ON THE BRAKE PEDAL. I WAS IN A PARKING LOT TODAY DRIVING SLOWLY AND THE ST MESSAGE CAME THEN THE DIC WENT BLACK AGAIN. WHEN I TRIED TO TURN THE WHEEL IT STARTED JERKING BACK AND PULLED OUT OF MY HAND. IT SEEMS THAT SHUTTING THE TRUCK OFF AND RESTARTING SOLVES THE PROBLEM FOR A DAY OR TWO. THIS IS A VERY UNSAFE ISSUE AND I HAVE SEEN AND READ MANY COMPLAINTS. I HAVE BEEN A HUGE FAN OF GM AND ALL I HAVE EVER OWNED WERE GM VEHICLES, BUT THIS ISSUE IS MAKING ME WONDER IF I SHOULD HAVE BOUGHT A FORD INSTEAD. IT SEEMS THAT GM IS NOT WORRIED ABOUT RECALLING BECAUSE OF THIS SAFETY ISSUE, WHICH THERE ARE MANY COMPLAINING OF THE SAME THING, AND MY WARRANTY IS ABOUT TO RUN OUT.

Mileage: 35,375

VEHICLE WILL LOSE POWER AND SHUT OFF WHILE DRIVING, WHILE IN REVERSE I HAVE HAD THE STEERING WHEEL RIPPED OUT OF MY HANDS. RANDOM ERROR MESSAGES ON DIC, RANDOM STARTING ISSUES. TAKEN TO SHOP MULTIPLE TIMES, THEY CANNOT FIND AN ISSUE.

Mileage: 58,500

RADIATOR LEAKING FROM TOP CORNER DRIVER SIDE AND PASSENNGER ALSO RUST ON FRAME

Mileage: 40,000

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.

Mileage: 15,000

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING THE GEAR SHIFTED INTO NEUTRAL INADVERTENTLY AND CAUSED THE VEHICLE TO ABRUPTLY ACCELERATE. THE CONTACT ALSO STATED THE VEHICLE CONSUMED THE ENGINE OIL PREMATURELY AND EXHIBITED ELECTRICAL FAILURE WITH THE WINDOWS OPENING AND CLOSING INDEPENDENTLY AND THE HEADLIGHTS FAILED TO ILLUMINATE. THE VEHICLE WAS TAKEN TO THE DEALER SEVERAL TIMES FOR THE FAILURES HOWEVER; THE DEALER ADVISED THERE WAS NOTHING THEY COULD DO TO REPAIR THE VEHICLE. THE MANUFACTURER WAS NOTIFIED F THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 8,000.

Mileage: 8,000

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

Mileage: 540