2014 GMC SIERRA 1500 Power Train Problems

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

The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle was veering to the right or to the left and was moving upwards and downwards. Additionally, the contact stated that the vehicle was veering excessively to the left or to the right while turning. The vehicle was taken to an independent mechanic, where the front brakes were replaced, and the contact was informed that the sway bar end links were fractured due to rust. The contact stated that upon inspecting underneath the vehicle, the lower parts of the links had detached, and one of the links was flapping. The contact purchased new parts from the dealer, and the mechanic replaced the links. Additionally, the contact stated that the vehicle was experiencing hard shifts while driving from a complete stop and while coming to a stop. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 67,000.

Mileage: 67,000

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.

Truck randomly shuts off and steering wheel locks up going down the road

Catastrophic transmission failure. Original transmission failed at 113,00 miles. I replaced it at the dealership with a factory rebuilt transmission and that transmission failed after only 40,000 miles. Now the vehicle is back in the dealership shop and they want me to replace the transmission a third time. This transmission is the 6L80 which is prone to fail, the torque converter fails and the transmission locks up I contacted General Motors and filed a complaint with them and they said they would not take any action or assist me with the repair.

Within the first week of buying my 2014 GMC 1500 SIERRA, the transmission fluid was black in griddy. I have had it flushed, then filter changed and new fluid put in within 2 week time frame. A week later had to put a new transmission in it. It barely would drive. So a purchase at 2,999 then to a transmission 4,800 and new control arm with ball joint with new axels. They were busted. Another 2,000. Its sicking. Advice

During a turn in the parking lot my vehicle would not allow me to turn something with traction control came up on the screen. The past few days the car got stuck at 0 rpms while driving and did not feel I had adequate power and other times has stalled.

The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving on several occasions at speeds of approximately 35 MPH, the transmission shifted abnormally, and the vehicle started vibrating. Additionally, the contact stated that while driving at speeds of 65 MPH and higher, the failure worsened. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 146,000.

Mileage: 146,000

Transmission shutter, not shifting correctly. Had to replace transmission

I was driving around a lake with my family. We were fishing. I had no warning at all and my transmission started to sputter and jerk extremely bad and my brakes did not work at the same time. I had to use my parking break to stop my family and I from going into the lake at 40mph. I looked up on many websites and forums and saw multiple people with the same issue. I am afraid that this will happen to a young driver and it be very tragic. Please do a recall. My truck is still sitting at my house broken. I am on disability and can not afford to fix it. I just keep paying my payments with no use of my truck. Please I beg of you.

There is a torque converter recall on the 2014 GMC sierra 1500 however my vehicle was not included in the recall but my transmission / torque converter went out.

Failed transmission

A loud clunk is heard from the transmission when shifting from one gear to anther after having to reduce acceleration.

At slow speeds, multiple times, I have had the truck completely have an electrical failure and the engine shut off. I have replaced the negative battery cable and ensured all connections are good. This has happened on streets when turning and in parking lots. When this happens all of the screens in the truck flicker and the service stabilitrack light comes on and then everything goes out, to include the engine. Myself, my family, and other drivers have been out at risk when the truck completely shuts off on a street. The dealership has not been able to give me an answer. There are many forums online where the 2014-2018 year models of this and similar GM vehicles have had the same problem. We need a specific fix for this before someone gets seriously injured or killed.

Transmission lost power

Transmission problems

I am losing engine power. My OBD2 gives me P2138 and P0700 codes. I have changed the accelerator and knock sensors.

The contact owns a 2014 GMC Sierra 1500. The contact stated while driving 50 MPH, the transmission inadvertently shifted to neutral(N) and the vehicle stalled. No warning lights were illuminated. The contact related the failure to NHTSA Campaign Number: 14V374000 (Power Train). The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was 112,000.

Mileage: 112,000

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.

The contact owns a 2014 GMC Sierra 1500. The contact stated while his wife was driving approximately 65 MPH, the vehicle began to vibrate and made loud grinding sounds. The contact stated that the vehicle began to lose motive power. The contact's wife was able to exit the highway; however, the transmission was slipping out of gear. The contact stated no warning light was illuminated. The contact stated that the failure had become constant. The vehicle was not taken to a local dealer or independent mechanic to be diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was 94,302.

Mileage: 94,302

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.

My truck goes into “neutral” or doesn’t have power while driving at times and can cause a car crash.

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?

I was driving and was almost home when I heard a pop and started getting jerked back and forth and then just slowed down almost to a complete stop with vehicles approaching quickly almost causing a multiple vehicle pile up I’ve heard multiple people complain about the particular transmission that is put in these gmc and chevy 1500s and am just confused with all of the problems I see on the internet and hear from peers in person why it has not been recalled yet if need be I will make a survey of gmc and chevy owners to let it be known that the transmissions on these vehicles were poorly built and need to be recalled before anybody has this problem that I had today

transmission shifting rough

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.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED WHILE APPROACHING A STOP SIGN, THE VEHICLE BEGAN TO SHAKE FORCEFULLY. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER LIBERTY BUICK GMC (9028 E INDEPENDENCE BLVD, MATTHEWS, NC 28105, (704) 708-8000) HOWEVER, THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE CONTACT STATED HE CONTINUED TO EXPERIENCE THE FAILURE. THE CONTACT ALSO STATED WHILE DRIVING AT LOW SPEEDS, THERE WAS AN ABNORMAL SOUND COMING FROM THE FRONT DRIVER'S SIDE WHEEL AXLE. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC WHERE THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS THEN TAKEN TO GRIFFIN BUICK GMC (2500 W ROOSEVELT BLVD, MONROE, NC 28110, (704) 289-3135) WHERE IT WAS DIAGNOSED WITH NEEDING THE FRONT DRIVER'S SIDE STRUT TO BE REPLACED. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC AND THE REPAIRS COMPLETED. THE CONTACT ALSO STATED WHILE DRIVING AT AN UNDISCLOSED SPEED, HE HEARD AN ABNORMAL SOUND COMING FROM THE VEHICLE. THE CONTACT STATED HE HAD THE TIRES REPLACED AND AN ALIGNMENT PERFORMED BUT CONTINUED TO HEAR THE ABNORMAL SOUND. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC AND THE CONTACT WAS INFORMED THAT THE GEARBOX NEEDED TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED. THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 87,000.

Mileage: 87,000

THE VEHICLE'S TRANSMISSION MAKES CLUNKING SOUNDS, AND JERKING MOVEMENTS WHEN ACCELERATING AND DECELERATING (HIGHWAY). WHEN STOPPED ON AN INCLINE THE VEHICLE DRIFTS BACKWARD, ONCE YOUR REMOVE YOUR FOOT OFF THE BRAKE (STREET). THE VEHICLE HAS ROLLED BACKWARDS WHILE IT WAS FULLY PARKED AND UNOCCUPIED.

I WAS DRIVING DOWN THE ROAD AND ALL OF THE SUDDEN IT WAS IF MY TRANSMISSION DISENGAGED AND MY CAR LOST POWER. IT THEN AUTOMATICALLY CAME BACK ON AND THE 'SERVICE STABILITRAK' LIGHTS CAME ON. I NEARLY AVOIDED AN ACCIDENT AND WAS ABLE TO PULL OFF ONTO THE SIDE OF THE ROAD.

Mileage: 96,000

I HAVE HAD TO REPLACE MY CONDENSING UNIT TWO DIFFERENT TIMES. ONCE AT 75,000 MILES, WHICH WAS COVERED BY MY EXTENDED WARRANTY THAT I PURCHASED, NOT BY GM, AND THE OTHER BROKE AT 107,000 MILES IN THE EXACT SAME SPOT, WHICH I HAD TO PAY FOR. THIS IS A JOKE! I HAVE ALSO HAD TO REPLACE MY OIL COOLING LINES TWO DIFFERENT TIMES, WHICH WERE ALSO NOT COVERED UNDER WARRANTY.

Mileage: 70,000

TOOK THE TRUCK TO GET A DIAGNOSTIC CHECK DUE TO THE TRUCK IN DRIVEWAY WOULD NOT GO INTO REVERSE SO HUSBAND PUT IT IN DRIVE TO PULL UP A LITTLE TO SEE IF IT WOULD HELP TO THEN GO INTO REVERSE, INSTEAD, THE TRUCK JERKED SO HARD & ALMOST THREW MY HUSBAND & SON INTO THE GARAGE DOOR THAT MORNING. HUSBAND & SON CAME BACK IN ALL SHOOK UP. THE SCAN DIAGNOSTIC CODE-CHCK SHOWED: TRANS FLUID-INDEED FULL; BUT WAY BURNT; NEEDS TRANSMISSION; FRONT PUMP MAKING NOISE IN TRANSMISSION; TORQUE CONVERTER; EXHAUST SHOWS SIGNS OF BACK PRESSURE-AND ONE RUNNING HOTTER THAN THE OTHER; THE LEFT SIDE RUNNING 100+ HOTTER THAN THE RIGHT - NEEDS TRANSMISSION ASSEMBLY REMOVED & REPAIRED; REMAN GM TRANS; Y-PIPE W/BOTH CONVERTERS; FLUIDS FLUSH NUTS BOLT GASKETS. I WAS TOLD IT WOULD NOT BE A GOOD IDEA TO DRIVE IT. I AM RETIRED MILITARY AND MAINTAINED THE TRUCK THROUGHOUT MY MILITARY CAREER, BUT NO WARNINGS SHOWED ON THE DASH READER FOR SOMETHING WRONG WITH TRANSMISSION. IT IS A 2014 GMC SIERRA 1500 SLT 5.3L V8. VIN#[XXX]. NEED HELP IF THIS ISSUE HAS EVER BEEN PLACED ON THE RECALL LIST? IF NOT, IT SHOULD BE. THIS ISSUE COULD KILL SOMEONE IF IT WERE TO JERK WHILE DRIVING ON THE ROAD. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

2014-2015 GMC SIERRAS WERE PRODUCED WITH A KNOWN FAULTY A/C CONDENSER WITH A BAD WELD THAT CAUSES AN A/C SYSTEM LEAK REQUIRING REPLACEMENT. THERE HAS BEEN AN OVERWHELMING FAILURE OF THE PRODUCT ACROSS THE COUNTRY, SO BAD SO THAT IT EVEN MADE THE NEWS. GM BECAME AWARE OF THIS ISSUE AND SENT NEW (PROPERLY PRODUCED) CONDENSERS TO THEIR PRODUCTION LINES FIRST, LEAVING HUNDREDS OF GMC OWNERS WITHOUT A/C OVER THE SUMMER. THEY PUT OUT A "SPECIAL RECALL" ON A VERY SMALL NUMBER OF VINS SAYING IT "MAY" HAPPEN IN OTHER VINS. THERE IS AN OVERWHELMING VOLUME OF COMPLAINTS ONLINE (INCLUDING MYSELF) WHERE GM IS ACKNOWLEDGING THIS ISSUE BUT REFUSING TO COVER THE REPLACEMENT COST OF THEIR FAULTY PART FOR HUNDREDS OF OWNERS HAVING THIS ISSUE. THIS REPAIR COST ME A LITTLE OVER $1300. IN THE SAME SERVICE VISIT FOR MY AC CONDENSER IT WAS IDENTIFIED THAT MY RADIATOR WAS LEAKING. THIS WAS DUE TO A FAULTY THERMOSTAT CAUSING STRESS FRACTURES IN THE RADIATOR CAUSING COOLANT TO LEAK. THIS ISSUE HAS ALSO BEEN IDENTIFIED BY GM HOWEVER ONLY A SELECT FEW VIN'S RECEIVED WARRANTY RECALLS. MY TOTAL REPAIR COST TO FIX BOTH ISSUES WAS IN EXCESS OF $4000. BOTH PROBLEMS ARE KNOWN TO GM YET THEY HAVE NOT REMEDIED THE ISSUE FOR EVERYONE.

DRIVING DOWN THE HIGHWAY ONE DAY AROUND 65MPH THE VEHICLE BEGAN TO SHUDDER VIOLENTLY, REDUCING MY SPEED TO LESS THAN 45MPH ALL THE WAY HOME (ALL THE WHILE STILL SHUDDERING) I TOOK IT TO A WELL KNOWN TRANSMISSION SHOP "WHITTY TRANSMISSIONS" IN OAK RIDGE NJ ONLY TO HAVE THEM DROP THE PAN AND FIND THE TRANSMISSION FLOODED WITH METAL CHIPS COSTING ME A $3900+ REBUILD. MY TRANSMISSION FAILED AT 87,000 MILES

Mileage: 87,000

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.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT AN UNDISCLOSED SPEED, THE VEHICLE JERKED AND THEN STALLED WITHOUT WARNING. THE VEHICLE WAS PUSHED INTO A DRIVEWAY. THE CONTACT STATED THAT HER BOYFRIEND'S MECHANIC CAME OVER AND DIAGNOSED THE VEHICLE. THE CONTACT WAS INFORMED THAT THE TRANSMISSION NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. NEITHER A DEALER NOR THE MANUFACTURER WERE MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 108,000.

Mileage: 108,000

SERVICE 4WD WOULD POP UP ON MY SCREEN EVERYTIME I STARTED MY TRUCK FOR THE LAST TWO DAYS GOING TO WORK. WHEN I GO SLOW AROUND TURNS THEN THE TRUCK WOULD ALMOST STOP. FOUND OUT THAT IT IS THE ACTUATOR AND MY 4WD IS TRYING TO GO INTO 4-LOW AUTOMATICALLY. DEALERSHIP COULD NOT FIT ME IN FOR A WEEK, SO I TOOK IT A TRANSMISSION PLACE BECAUSE THIS IS MY WORK TRUCK AND NOW HAVE ALL MY TOOLS IN MY WIFE'S ACADIA. I HAVE A 32 FT LADDER ON MY TRUCK THAT I'M GOING TO NEED ASAP AND CAN'T PUT ON WIFE'S ACADIA SO I COULD NOT WAIT ON THE DEALERSHIP TO FIT ME IN. ALL TRANS TRANSMISSION PLACE HAS HAD IT SINCE 3 PM ON JULY 7TH AND I JUST PAID $438 FOR A PART AND I'M UP TO THREE SHOP HOURS SO FAR THAT I HAVE TO PAY FOR WHEN I PICK IT UP HOPEFULLY TOMORROW, WHICH WILL INCLUDE THE ADDITIONAL SHOP HOURS IN INSTALLING THE NEW ACTUATOR. THIS IS GETTING EXPENSIVE AND THERE IS NO RECALL FOR THIS PART THAT I'VE SEEN, BUT SHOULD BE INCLUDED IN THE MANUFACTURER WARRANTY. I CAN PROVIDE ALL RECEIPTS ONCE I GET THEM.

Mileage: 66,246

AT SPEEDS HIGHWAY SPEEDS 50 AND ABOVE THE TRUCK CAN SHACK HORRIBLE CAUSING TO APPLY VEHICLES HAZARDS AND PULLING OFF THE ROAD FOR FEELING LIKE THE TRUCK IS COMING APART WITH THE FEAR OF LOOSING CONTROL OF THE VEHICLE. THE HORRIBLE SHACK CAUSE NAUSEA AND DIZZINESS. I HAVE REPLACED WHEELS AND TIRES, SHOCKS, RE ALIGNED AND BALANCED MULTIPLE TIMES NOTHING HAS FIXED THE ISSUE. WILL BE IN TOUCH WITH A GMC DEALER ABOUT THIS SITUATION . *TR

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

THE FACTORY INSTALLED HEAD LIGHTS ARE SO BAD THAT YOU CAN BARELY SEE AT NIGHT ONE OF THE WORST MOST DANGEROUS ISSUES I'VE EVER SEEN ON A VEHICLE PLEASE LET ME KNOW HOW WE CAN REMEDY THE SITUATION

Mileage: 40,000

MY TRUCK HAS 158,000 MILES AND HAD TO HAVE A NEW TRANSMISSION PUT IN AS IT WAS HAVING PROBLEMS ACCELERATING, GRINDING AND SOUNDING LIKE I WAS GOING OVER RUMBLE STRIPS.

Mileage: 158,000

AUTOMATIC TRANSMISSION TOTALLY FAILED WHILE ENTERING UNTO INTERSTATE HIGHWAY. WAS ABLE TO PULL OFF HIGHWAY ONTO EXIT RAMP PARTIALLY BLOCKING RAMP UNTIL WRECKER ARRIVED. REQUIRED COMPLETE REBUILD

Mileage: 125,000

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

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED TAHT WHILE DRIVING APPROXIMATELY 75 MPH, THE VEHICLE STARTED TO SHUDDER. NO WARNING INDICATORS WERE ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHERE IT WAS DETERMINED THAT THE TRANSMISSION NEEDED TO BE REBUILT. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO YES CHEVROLET LOCATED AT 200 SATURN WAY, HURRICANE, WV, 25526, FOR AN OIL CHANGE A WEEK PRIOR TO THE FAILURE WHERE THE CONTACT WAS INFORMED THAT THERE WERE NO ADDITIONAL ISSUES WITH THE VEHICLE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 150,000. VIN NOT AVAILABLE.

Mileage: 150,000

THE ENGINE LIGHT STAYED ON AFTER THE TRUCK HAD AN OIL CHANGE AT THE DEALERSHIPTECHNICIAN CHECKED AND FOUND OIL PRESSURE CONTROL VALVE SOLENOID CIRCUIT OPEN TECHNICIAN SCAN FOR CODES AND DC TCPO6 DA IS SNAP TECHNICIAN PERFORMED SYSTEM TEST AND MEASURE THE RESISTANT OF THE OIL PRESSURE CONTROLS SOLENOID AT X15 FOR THE SOLENOID AND THE INTERNAL HARNESS READ OPEN TECHNICIAN REMOVED THE OIL PAN AND FOUND THE SOLENOID CONNECTION HAS BEEN DISCONNECTED WHICH WAS NOT PROPERLY ASSEMBLED AT THE MANUFACTURE AND TECHNICIAN ALSO DISCOVERED TRANSMISSION LINES LEAKING

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING THE VEHICLE, A ROARING NOISE WAS HEARD AND THE VEHICLE WOULD JERK, LUNGE, AND SPUTTER WHEN STARTED. PRINCE AUTOMOTIVE GROUP CHEVROLET (4550 N VALDOSTA RD, SUITE #200, VALDOSTA, GA 31602, (866) 560-9556) STATED THAT THE VEHICLE WAS NOT INCLUDED IN A RECALL FOR THAT SPECIFIC FAILURE. THE MANUFACTURER WAS CALLED AND FORWARDED THE CONTACT TO NHTSA. THE FAILURE MILEAGE WAS 110,536.

Mileage: 110,536

I WAS DRIVING ON THE INTERSTATE AND A MESSAGE STATING "SERVICE STABILITRACK" MESSAGE APPEARS SIMULTANEOUSLY WITH THE CHECK ENGINE LIGHT AND SERVICE TRACTION CONTROL, THE CAR LOSES THE ABILITY TO ACCELERATE AND MAINTAIN SPEED. I KEPT DRIVING BECAUSE THERE WAS NO SAFE PLACE TO STOP, AND AFTER A FEW MILES THE DOOR LOCKS UNLOCKED THEN LOCKED, THE INFO SCREEN FLASHED AND THEN THE ENGINE REVVED AND APPEARED TO DRIVE NORMALLY. SEVERAL MILES LATER IT HAPPENED AGAIN, OVER AND OVER. WHEN I REACHED MY NIEGHBORHOOD THE CAR COMPLETELY POWERED OFF.

Mileage: 107,000

WHWN DRIVING ON HIGHWAY AT 60 MPH - TRIED TO PASS ACCIDENT SCENE TRUCK TAC STARTED REVING. SPEED DROPPED TO 25-30 MPH. PUSHING ACCELORATOR ONLY REVED THE ENGINE MORE WITH NO INCREASE IN SPEED. BURNING SMELL. DEALER UNABLE TO FIND CAUSE. HAPPENED TWICE.

Mileage: 55,000

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

MY 2014 GMC SIERRA PRESSURE CONTROL SOLENOID WENT BAD. TOOK IT TO KNIGHT AUTOMOTIVE, INC., IN PLATTSBURGH, NY FOR REPAIR. AFTER REPAIR I DROVE HOME ONLY TO BE TOLD BY BILL DELORD GMC IN LEBANON, OH - AND BOERCHERDING GMC IN CINCINNATI, THAT THE ENTIRE TRANSMISSION WAS DESTROYED. KNIGHT PUT MY FAMILY AT RISK BY IMPROPERLY REPAIRING MY VEHICLE.

Mileage: 100,800

FOR OVER 45K MILES I HAVE COMPLAINED OFF A VIBRATION COMING FROM THE REAR OF MY GMC SIERRA AT 65 TO 75 MILES PER HOUR. MY SUPPORTING DEALER THAT I PURCHASED IT FROM CAN'T FIND THE PROBLEM AND IS MOST LIKELY OUT OF BUSINESS.THIS IS AN ONGOING ISSUE. RECENTLY I WENT UNDER THE TRUCK TO FIND THE ENTIRE FRAME IS RUSTED FROM THE GAS TANK BACK TO THE REAR OFF THE VEHICLE AROUND THE SPARE TIRE AND ELSEWHERE. WHATS WRONG WITH GM MANUFACTURING, ARE THEY THAT CHEAP, THAT NO PAINT IS PLACE ON THE FRAME. ADDITIONALLY THE CHROME WHEELS THAT CAME WITH THE VEHICLE ARE CORRODING YET ANOTHER CHEAP PROCESS THAT GM REFUSES TO ADDRESS. MIND YOU I HAVE ALWAYS FIXED AND REPAIRED MY OWN VEHICLES. I HAVE WASHED THIS VEHICLE SO MUCH BY USING A COLD WATER HOSE UNDER THE VEHICLE AND THE TOP AS WELL TO GET THE SALT AND BRINE USED BY THE NORTHERN STATES OFF THE CAR AND YET I STILL GET THE CORROSION. HOW DO I GET GM. TO FIX THE WRONGS THEY HAVE PRODUCED.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED AFTER PARKING ON A BOAT RAMP AND EXITING THE VEHICLE, THE NOTICED THAT THE VEHICLE HAD STARTED TO ROLLAWAY. THE CONTACT STATED HE JUMPED BACK INTO THE VEHICLE AND DEPRESSED THE BRAKE PEDAL BUT THE VEHICLE ROLLED INTO A TREE. THE CONTACT STATED THAT THE HAD TO BE TOWED UP THE INCLINE TO THE ROADWAY. THE CONTACT MENTIONED THAT THE FAILURE HAD OCCURRED TWICE AS THE VEHICLE WAS PLACED IN PARK BUT ROLLED AWAY. THE VEHICLE WAS TAKEN TO THE DEALER BOUCHER CHEVROLET (1907 E MORELAND BLVD, WAUKESHA, WI 53186) THE DEALER COULD NOT DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND A COMPLAINT NUMBER: 8-4691104286 WAS FILED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 70,000. THE VIN WAS NOT AVAILABLE.

Mileage: 70,000

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.

TAKATA RECALL, THE AUTOMATIC LOCKS KEEPS LOCKING AND UNLOCKING ON THEIR OWN,WHETHER IT'S PARKED OR DRIVING. TAKATA RECALL, THE TRANSMISSION SHUTTERS AND ROUGH SHIFTING WHEN SLOWING DOWN OR TAKING OFF,HOWEVER THE WORST SEEMS TO BE WHEN SLOWING DOWN

Mileage: 64,677

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.

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 25 MPH DOWNHILL WITH THE ACCELERATOR PEDAL RELEASED, THE VEHICLE WENT OUT OF GEAR AND HAD NO ACCELERATION. THE CONTACT HAD TO SWITCH TO NEUTRAL AND THEN TO DRIVE IN ORDER FOR THE VEHICLE TO PERFORM NORMALLY. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT ALSO STATED THAT THE FAILURE ONLY OCCURRED WHEN THE VEHICLE WAS TRAVELING BELOW 30 MPH AND WITH THE FOOT OFF THE ACCELERATOR AND BRAKE PEDALS. THE FAILURE OCCURRED FOUR TIMES. THE VEHICLE WAS TAKEN TO THE DEALER (WEST BROTHERS GMC/CHRYSLER IN SULLIVAN, MISSOURI) FOUR TIMES, BUT THEY WERE NOT ABLE TO REPLICATE THE FAILURE. THE MANUFACTURER WAS NOTIFIED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 71,000.

Mileage: 71,000

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE SLOWING DOWN AT A STOP SIGN AT 12 MPH, THE VEHICLE INDEPENDENTLY SHIFTED TO A LOWER GEAR AND MADE A CLUNKING SOUND. THE FAILURE RECURRED MULTIPLE TIMES. THE VEHICLE WAS TAKEN TO A DEALER, BUT NO FAILURES WERE FOUND. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS 25,000.

Mileage: 25,000

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 40 MPH, AN ABNORMALLY LOUD BANGING NOISE WAS HEARD FROM THE FRONT END OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER, BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 2,000. UPDATED 03/07/17*LJ *CN

Mileage: 2,000

HEADS LIGHTS ARE SO DIM I CANT DRIVE THE TRUCK AT NIGHT ALSO THE IS A BAD VIBRATIONS COMING FROM THE REAR END.

INTERMITTENTLY, WHEN APPLYING THE BRAKES TO STOP FOR A RED LIGHT, THE ENGINE WANTS TO KEEP THE VEHICLE GOING AT THE SAME SPEED AND FIGHTS THE BRAKE SO THE VEHICLE CANNOT STOP. SHIFTING THE GEAR SHIFT INTO NEUTRAL ALLOWS THE BRAKES TO WORK BUT THE ENGINE RPM REVS UP TO 2500 RPM FOR ABOUT 15 SECONDS BEFORE DROPPING TO IDLE. IF THE DRIVER DIDN'T APPLY THE BRAKES HARD ENOUGH OR SHIFT INTO NEUTRAL, THE VEHICLE WOULD OVERPOWER THE BRAKES AND DRIVE INTO ANYTHING AHEAD. ANALOGY: IT ACTS AS IF THE CRUISE CONTROL WAS ON (AND IT'S NOT) AND TRIED TO KEEP THE SAME FORWARD SPEED NO MATTER THE BRAKE APPLICATION. DEALER CANNOT REPRODUCE THE PROBLEM, NO ALERT WARNING LIGHT. SOME TIMES, GOING AT HIGHWAY SPEED, TAKING FOOT OFF ACCELERATOR AND EXPECTING VEHICLE TO START SLOWING DOWN, IT STAYS AT SAME SPEED FOR ABOUT 15 SECONDS BEFORE DROPPING RPMS. THIS HAS BEEN HAPPENING, INTERMITTENTLY, FOR A FEW MONTHS.

Mileage: 35,000

THE TRACTION CONTROL IS NOT WORKING. ON WET PAVEMENT IT SPINS SIDEWAYS OUT OF CONTROL. DEFINITELY A SAFETY ISSUE ACKNOWLEDGED BY THE DEALER BUT AFTER 5 STRAIGHT WEEKS OF WORKING ON THE PROBLEM, GM SAYS IT'S NORMAL. THIS WILL GET SOMEONE KILLED.

Mileage: 34,000

I HAVE TAKEN MY TRUCK INTO THE DEALER 3 TIMES FOR CLUNKING DURING SHIFTING AND LOSING POWER BETWEEN 30-45 MPH WHEN ATTEMPTING TO ACCELERATE IN TRAFFIC. I HAVE BEEN TOLD BY THE DEALER THAT GMC SAYS THIS IS NORMAL FOR MY TRUCK. IT IS NOT NORMAL FOR THESE PROBLEMS. I HAVE RESEARCHED THIS ISSUE ON THE INTERNET AND IT HAS BEEN IDENTIFIED AS A PROBLEM WITH THE ACTIVE FUEL MANAGEMENT SYSTEM CONTROLLED BY THE COMPUTER MODULE TO ACHIEVE EXPECTED GAS MILEAGE DEMANDED BY THE GOVERNMENT. I PAID $42,000 DOLLARS FOR THIS TRUCK BRAND NEW. I SHOULDN'T BE HAVING THIS OCCUR. I OWNED A 1995 GMC EXTENDED CAB THAT IS STILL ON THE ROAD WITH 215,000 MILES. THIS TRUCK HAS ONLY 23,000 MILES AFTER 2 YEARS OF OWNERSHIP.

Mileage: 22,500

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. WHILE THE VEHICLE WAS IN THE PARK POSITION, THE FOUR WHEEL DRIVE SERVICE LIGHT ILLUMINATED WITHOUT WARNING. THE CONTACT WAS UNABLE TO DISABLE THE FOUR WHEEL DRIVE. THE VEHICLE WAS TAKEN TO BE DIAGNOSED BY A DEALER, BUT THE ISSUE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 20,000.

Mileage: 20,000

VEHICLE HAS SHUDDER, WOBBLE AND VIBRATION WHEN BEING DRIVEN AT SPEEDS 40-80. GMC HAS DIAGNOSED AS A TIRE ISSUE BUT VEHICLE HAS BEEN SEEN 14+ TIMES AND TIRES HAVE ALL BEEN ROAD FORCE BALANCED, NUMEROUS TIMES. GMC REFUSES TO DIAGNOSE FURTHER AND HAS NOT IDENTIFIED THE CAUSE OF THE PROBLEM. VIBRATION HAS AFFECTED OTHER COMPONENTS. COMMONLY REPORTED PROBLEM AFFECTING 2014 GMC SIERRA TRUCKS BASED ON INTERNET SEARCH.

Mileage: 140

THE PART BROKE IN HALF AT LOW SPEED WHILE I WAS DRIVING IN A CONSTRUCTION AREA (MY OWN DRIVEWAY BEING INSTALLED) I HIT SOMETHING AND THE METAL CASING OF THE AXLE WHERE IT ATTACHES TO THE FRONT DIFF. BROKE IN HALF. I AM 60 YEARS OLD MY WIFE WAS IN THE TRUCK I WAS GOING SO SLOW THE SPEEDOMETER WAS ON 0. THE DEALER SAID THE PART WAS CRACKED BY THE IMPACT. THIS IS SUPPOSED TO BE A HEAVY DUTY 4X4 P/U, IF I WAS GOING AT 40 MPH OFF ROAD WHAT WOULD HAVE BROKE AND WHAT WOULD HAVE BEEN THE RESULT? I THINK THE METAL OF THE CASING WAS FLAWED AND I AM AFRAID TO KEEP THE TRUCK. THE DEALER SAID THIS ISN'T A WARRANTY ISSUE I HAD TO PUT A CLAIM INTO MY INS. THIS IS NOT ONLY A CONCERN FOR SAFETY BUT FOR FINANCES AS WELL. I PAID $44,000. CASH FOR THIS TRUCK, IT IS THE SIERRA SLT NOT ONLY A 4X4 BUT IT HAS 20" RIMS FOR ADDED HEIGHT. THIS WAS NOT HIT HARD ENOUGH TO CRACK A STEEL CASING. THE TRUCK IS AT A GMC/BUICK DEALER IN MOUNT DORA FL. THEY SAID IT MIGHT TAKE AWHILE TO FIND THE PARTS TO FIX IT. I DO NOT THINK GMC MAKES CHEAP TRUCKS OR DANGEROUS TRUCKS BUT I THINK AFTER THIS GETS FIXED I WILL BE LOOKING INTO TRADING IT. *TR

Mileage: 15,000

EXCESSIVE VIBRATION AT HIGHWAY SPEEDS. MANUFACTURER IS AWARE BUT HAS NO SOLUTION. *TR

Mileage: 5

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED THAT AFTER EXITING THE VEHICLE, IT ROLLED AWAY. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 3,000. THE VIN WAS UNAVAILABLE.

Mileage: 3,000