28 of the
332 complaints filed about the GMC Sierra Denali
are about the transmission —
8% of everything owners reported.
The worst model year for it is 2016.
28
Complaints
8%
Share of all complaints
0
Crashes
0
Fires
Transmission & Drivetrain complaints by model year
The contact owns a 2018 GMC Sierra Denali 1500. The contact stated that on several occasions while driving at speeds over 30 MPH, the vehicle started shaking abnormally. The contact stated that the vehicle stalled while driving on three separate occasions and stalled twice while slowing down. There was no warning light illuminated. The vehicle was able to restart each time, but on one occasion, several attempts were needed to restart the vehicle. The vehicle was taken to a dealer, where it was diagnosed, and determined that the transmission, torque converter, exhaust gaskets, filter, and 8D fluid needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 87,000.
NHTSA complaint #11728807 — an unverified report by a vehicle owner.
The contact owns a 2017 GMC Sierra Denali. The contact stated that while driving on the highway at an undisclosed speed, the vehicle jerked, failed to accelerate, and stalled. The vehicle was unable to shift into third gear. The check engine warning light was illuminated. The vehicle was drivable and was taken to the dealer. The vehicle was diagnosed with a wiring harness failure on the transmission. The vehicle was repaired based on the diagnostic test but failed to fix the vehicle. The vehicle was parked at the residence and was undrivable. The failure mileage was approximately 103,000.
NHTSA complaint #11723074 — an unverified report by a vehicle owner.
The contact owns a 2015 GMC Sierra 1500 Denali. The contact stated that while shifting the vehicle from park(P) to drive(D), the vehicle hesitated and then jerked into gear. The contact stated that the entire vehicle was shaking when it jerked into gear. The contact stated that the failure was also occurred while shifting the vehicle into reverse(R). Additionally, the failure occurred while slowing down for a traffic signal. The contact stated that the failure was a constant. The contact stated she had not noticed any warning lights during the failure. The contact had taken the vehicle to a local dealer who advised the contact that there were no open recalls for the transmission on the VIN. The vehicle was not diagnosed. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.
NHTSA complaint #11576241 — an unverified report by a vehicle owner.
The contact owns a 2019 GMC Sierra Denali. The contact stated while parking the vehicle, the vehicle inadvertently stalled without warning. The contact attempted several times to restart the vehicle however, the vehicle would not restart. The contact attempted to jump start the vehicle and the failed to start. The vehicle was towed to the dealer where the starter was replaced; however, the failure persisted. The contact was informed that the engine needed to be replaced due to metal shavings in the engine. The vehicle was not repaired. The manufacturer was contacted and they offered to partially pay for the repair. The contact stated that he believed that the vehicle was not repaired correctly under NHTSA Campaign Number: 20V650000 (Power Train). The failure mileage was 91,000.
NHTSA complaint #11474899 — an unverified report by a vehicle owner.
DRIVING DOWN THE HIGHWAY ABOUT 65MPH IT MADE A LOUD CLUNK AND I TOOK IT IN TO SERVICE DEPARTMENT AND THEY TOLD ME I WOULD HAVE TO PAY ABOUT $400.00 TO DRAIN THE TRANSMISSION FLUID AND REPLACE IT. I TOLD THEM M PICK UP ONLY HAS LESS THAN 15,000 MILES ON IT I DON'T THINK THIS IS FAIR, THE SERVICE GU SAID THE DON'T PAY FOR IT AND OTHER GMC DENALI CUSTOMERS HAD THEIRS DONE AND PROBLEM WAS SOLVED AND I WASN'T THE ONLY CUSTOMER THAT HAD THE ISSUE AND CORY FROM ALASKA AUTO BODY SAID IT WAS SAFE TO DRIVE
NHTSA complaint #11385369 — an unverified report by a vehicle owner.
WHILE DRIVING MY GMC SIERRA DENALI THE TRANSMISSION SHUDDERS REALLY BAD. I HAVE A 2017 WITH JUST 13,200 MILES ON IT. I WAS PULLING MY BASS BOAT AND THE SHURDDER WAS SO BAD MY DASH WAS SHAKING AND THE STEERING WHEEL WAS ALSO .I HAVE HAD THE FLUID CHANGED AT THE DEALERSHIP AND IT SHIFTED FINE AND DID NOT SHUDDER UNTIL IT REACHED AROUND 1000 MILES AFTER FLUID CHANGE AND IT IS DOING IT WORSE NOW THAN BEFORE. I TOOK IT TO THE DEALER CLOSE TO ME AND THEY INFORMED ME TODAY THEY WERE GOING TO DO NOTHING AND THEY TOLD ME TO TAKE IT BACK TO THE DEALER I BOUGHT IT FROM! THIS IS UNACCEPTABLE! I UNDERSTAND FROM ALL I HAVE BEEN READING ABOUT THIS PROBLEM GM STILL IS BUILDING AND SELLING TRUCKS WITH THE 8 SPEED TRANS IN THEM AND STILL HAVING PROBLEMS. REALLY? I GUESS I WILL KEEP DRIVING MINE AND I HOPE THE TRANSMISSION JUST COMES APART THEN THEY WILL GIVE ME ANOTHER TRANSMISSION DOING THE SAME THING! JUST GREAT GM!
NHTSA complaint #11364221 — an unverified report by a vehicle owner.
APPARENTLY, THE 8 SPEED AUTOMATIC TRANSMISSION HAS ISSUES WITH WIRING HARNESS AND HARD SHIFTING WHICH THE MANUFACTURER HAS 18 SERVICE BULLETINS OUT ON YET STILL WILL NOT RECALL AND FIX PROBLEMS. ALSO THE BRAKE SYSTEM IS FAULTY AND UNSAFE IT LOSES PRESSURE AND EVEN BRAKING AT VARIOUS SPEEDS. AFTER TAKING IT TO THE DEALERSHIP THEY CAN NOT FIGURE OUT WHY AND SAY IT IS VARIOUS PARTS AND SHOULD BE RECALLED BUT IT IS NOT AS OF YET. GM KNOWS OF THESE ISSUES AND THE 1000S OF DOLLARS CUSTOMERS HAVE TO PAY FOR THESE REPAIRS. THIS IS WRONG AND NEEDS TO BE RECTIFIED.
NHTSA complaint #11363769 — an unverified report by a vehicle owner.
SINCE I'VE OWNED THIS VEHICLE I HAVE HAD TRANSMISSION PROBLEMS. ONCE IT WENT FROM 70 TO 20 ON THE HIGHWAY.. IT KICKS OR JERKS AT ANY SPEED... ESPECIALLY GOING SLOW.. THE SHIFTING IS HORRIBLE!!! THE FEELING OF IT LOSING POWER AGAIN LIKE IT DID COULD CAUSE SERIOUS DAMAGE TO THE TRANSMISSION AND UNSELFISH AND PASSENGERS.. I DON'T TRUST IT ON THE HIGHWAY!!! I KEEP A MONITOR CONNECTED TO MY TRUCK AT ALL TIMES.. THE DATES COINCIDE WITH THE PAPERWORK!! ONGOING TRANNY ISSUES ALL THE TIME!! I PAID WAY TO MUCH FOR THIS LEMON!! ENGINE VIBRATES AROUND 80.. AND IF YOU DON'T USE YOUR BLINKER.. THEY TRUCK FIGHTS YOU TO CHANGE LANES.. IT PULLS YOU BACK!!
NHTSA complaint #11352692 — an unverified report by a vehicle owner.
IN 2017 BEFORE MY VEHICLE COMPLETING TWO YEARS FROM THE DATE OF PURCHASE AT (70,000 KM) THE VEHICLE START SHUDDERING WHEN ACCELERATING AT LOW SPEED, WHEN THE SERVICE WAS DUE I TOOK THE VEHICLE TO DEALER FOR SERVICE & COMPLAINED ABOUT THE SHUDDERING ISSUE, AFTER DIAGNOSING THE VEHICLE THEY SAID THAT THEY HAVE TO REPLACE THE TORQUE CONVERTER, SO THEY DID REPLACE THE TORQUE CONVERTER UNDER WARRANTY AFTER FIXING THE TORQUE CONVERTER ISSUE I FOUND TRACE OF OIL IN FRONT DRIVER SIDE & AGAIN WHEN THE SERVICE WAS DUE I COMPLAINED ABOUT THE LEAK, AFTER DIAGNOSING THE FOUND THAT THE SHOCK ABSORBER IS LEAKING, BUT THEY DIDN'T REPLACE IT BECAUSE IT'S NOT COVERED BY THE WARRANTY AS THEY SAID IT'S CONSIDERED AS CONSUMABLE PARTS, VERY STRANGE FOR A SHOCK TO LEAK IN LESS THAN THREE YEARS CONSIDERING THAT I DIDN'T EVEN DRIVE IT IN OFFF ROAD, & THIS IS NOT THE FIRST VEHICLE I OWN, ALL THE VEHICLES I OWNED DIDN'T LEAK FOR TWENTY YEARS, SORRY I KNOW IT'S CONSUMABLE PART BUT I AM NOT CONVINCED BY THESE WORDS, THERE MUST BE A PROBLEM WITH THE SHOCKS, ANYWAY I DECIDED TO NOT REPLACE IT WITH THE OEM SHOCKS I INSTALLED FOUR NEW AFTER MARKET SHOCK, NO MORE PROBLEMS WITH THE SHOCKS TILL TODAY. IN Q4 LAST YEAR 2019 THE TRANSMISSION SHUDDERING ISSUE STARTED AGAIN & WHEN I TOOK THE VEHICLE FOR SERVICE I RAISED A COMPLAIN AGAIN FOR SHUDDERING ISSUE, THIS TIME THEY SAID WE DON'T HAVE TO REPLACE THE TORQUE CONVERTER WE ONLY HAVE TO FLUSH THE TRANSMISSION FLUID WITH NEW OIL, I THINK IT'S MOBIL 1, & I HAVE TO PAY FOR THAT BECAUSE AGAIN CONSUMABLES & NOT COVERED BY THE WARRANTY, HEY WAIT A MINUTE YES I BROUGHT THE VEHICLE FOR SERVICE PLUS THE SHUDDERING PROBLEM BUT THE TRANSMISSION FLUID IS NOT DUE YET FOR CHANGE IF YOU HAVE TO FLUSH THE TRANSMISSION TO FIX THE PROBLEM THEN DO IT, BUT DON'T CHARGE ME BECAUSE OF THE MANUFACTURER FAULT.
NHTSA complaint #11337567 — an unverified report by a vehicle owner.
HARSH DOWNSHIFT INTERMITTENT BETWEEN 20 AND 30 MPH. BINDING/CLUNKING AT LOW SPEEDS WHEN DOWNSHIFTING INTO FIRST OR UP SHIFTING INTO 2. TRANSMISSION SHUDDER WHEN ACCELERATING IN FIRST GEAR. VEHICLE LUNGES FORWARD INTERMITTENTLY AT LOW SPEEDS WHEN SHIFTING.
NHTSA complaint #11331959 — an unverified report by a vehicle owner.
WHEN DRIVING AT HIGHWAY SPEED OR ACCELERATING THE BACK OF THE TRUCK WILL VIOLENTLY VIBRATE.AT TIME IT IS ALMOST UNCONTROLLABLE AND BECOMES VERY HARD TO STEER. I SO I HAVE RESEARCHED THIS ISSUE AND IT SEEMS THAT THERE ARE MANY COMPLAINTS ABOUT THIS EXACT ISSUES WITH 2014 TO 2019 CHEVY AND GMC TRUCKS. I JUST HAD THE ALIGNMENT DONE AND BRAND NEW TIRES PUT ON IT THE TRUCK 6-22-20. NOW THE TRUCK SHAKES EVEN MORE THEN IT DID BEFORE.
NHTSA complaint #11330205 — an unverified report by a vehicle owner.
ELECTRIC/ELECTRONIC/COMPUTER ISSUES. MOST ISSUES ARE INTERMITTENT, SOME HAPPEN ALL THE TIME. THE INTERMITTENT ONES SOMETIME HAPPEN IN CLUSTERS (MULTIPLE TIMES A DAY THEN NOT FOR DAYS, WEEKS, MONTHS) A FEW HAVE ONLY HAPPENED ONCE SO FAR. THE FOLLOWING ISSUES HAPPEN ALL THE TIME. DOES NOT COME OUT OF CRUISE CONTROL AUTOMATICALLY DURING COLLISION ALERT. DOES NOT AUTOMATICALLY BRAKE DURING IMMINENT COLLISION WITH AUTO BRAKE FEATURE TURNED ON. SECONDARY BLUETOOTH PHONE DOES OUTGOING CALLS THROUGH TRUCKS INFO SYSTEM. HEADS-UP DISPLAY GIVES DOUBLE TURN DIRECTIONS DURING ROUTE GUIDANCE NAV. BLUETOOTH TEXTING DOES NOT WORK. THE FOLLOWING ISSUES HAPPEN FREQUENTLY. TRANSMISSION BANGS/SHUDDERS PERIODICALLY, ACCELERATING, NOT ACCELERATING, SLOWING DOWN, JUST DRIVING, MOSTLY ON LEVEL GRADE. SOMETIMES STRONG ENOUGH TO FEEL LIKE I WAS REAR ENDED, PASSENGERS HAVE JUMPED MANY RADIO MEDIA ISSUES WITH SOUND AND NAV BOOT UP. DURING PARKING MANEUVER AFTER COMING OUT OF REVERSE AND GOING INTO DRIVE, FORWARD CAMERA WOULD COME ON AND THEN SWITCH TO NAV SCREEN WHEN I TOOK MY FOOT OFF THE BRAKE. TO RESOLVE WOULD GO IN REVERSE THEN BACK TO DRIVE AND THE FRONT CAMERA WOULD STAY ON. AFTER VEHICLE START I GO INTO DRIVE AND FRONT CAMERA COMES ON. SOMETIMES IT DOES NOT IN THE EXACT SIMILAR CIRCUMSTANCES. NO INDICATION FROM FORWARD DETECTION SENSORS. AFTER BACKING OUT OF A PARKING SPOT, GOING INTO DRIVE FORWARD CAMERA COMES ON THEN THE WHOLE SCREEN GOES BRIGHT BLUE, AFTER A FEW SECONDS FORWARD CAMERA COMES BACK ON UNTIL I SPEED UP. OTHER ISSUES NOT SO FREQUENT. HAVE BEEN TO DEALERSHIP OVER 9 TIMES FOR A TOTAL OF 37 DAYS IT WAS IN THE SHOP. GMC CAC USELESS AND DO NOT KNOW THE PRODUCT. DEALERSHIP TECHNICIANS ARE NOT FAMILIAR WITH NEW PRODUCT OR HAVE THE COMPUTER SKILL SET TO FIX.
NHTSA complaint #11307106 — an unverified report by a vehicle owner.
THE TRUCK HAS A HORRIBLE VIBRATION FROM AROUND 45 MPH AND UP. HAVE TEST DROVE OTHER 2016 GMC SIERRAS WITH SAME ISSUE. HAVE TAKEN IT BACK TO THE DODGE DEALERSHIP WE BOUGHT IT FROM AND THEY SAID IT SHOULD BE A RECALL
NHTSA complaint #11289000 — an unverified report by a vehicle owner.
TRANSMISSION IS NOT ABLE TO BE FIXED. THREE REPAIRS AND GM CAN'T FIX. TRANSMISSION JERKS, SLIPS, CLUNKS. UNCOMFORABLE TO DRIVE. I AM STUCK WITH SUBPAR VEHICLE. GM HAS BEEN HORRIBLE TO WORK WITH. 17 RECALLS? WHY CANT GM MAKE A SOLID RELIABLE VEHICLE AFTER 100 YEARS IN BUSINESS?
NHTSA complaint #11287131 — an unverified report by a vehicle owner.
VEHICLE HAS FAULTY TRANSMISSION SYSTEM THAT AT SHAKES DURING USE OF THE VEHICLE AT ALL SPEEDS. THE VEHICLE ALSO EXPERIENCES "HARD SHIFTS" AT LOW SPEED TO THE POINT THAT THE VEHICLE REAR TIRE "CHIRP" WITH SUCH FORCE THAT IT FEELS LIKE YOU'VE BEEN HIT FROM THE REAR BY ANOTHER VEHICLE.
NHTSA complaint #11281163 — an unverified report by a vehicle owner.
BRAKE FAILURE ISSUE AT LOW SPEED. THIS HAPPENED IN TWO SEPARATE OCCURRENCES IN PARKING LOTS. THE BRAKE PEDAL BECAME VERY STILL AND REQUIRED GRABBING THE STEERING WHEEL AND USING IT TO PULL MYSELF DOWN HARDER ON THE BRAKE PEDAL TO GET THE VEHICLE TO STOP. THIS RESULTED IN GREATLY INCREASED STOPPING DISTANCE. FORTUNATELY NO VEHICLES OR PEOPLE WERE IN MY PATH DURING THESE OCCURRENCES. GM HAS SINCE REPAIRED MY VEHICLE. I HAVE SINCE RECEIVED A NOTICE THAT THEY ARE REPAIRING THIS ISSUE ONLY AFTER THE OWNER HAS A BRAKE FAILURE PROBLEM. THIS IS EXTREMELY UNSAFE AND IS UNACCEPTABLE. OWNERS NEED A SOLUTION AND DO NOT NEED TO WORRY THAT THIS ISSUE WILL ARISE AGAIN. IF I HIT A PERSON OR A VEHICLE, WILL GM PAY FOR MEDICAL BILLS, VEHICLE REPAIRS, LEGAL FEES? THIS TRUCK AS WELL AS MY LAST 2009 CHEVROLET SILVERADO HAD ISSUES WITH THE DRIVE TRAIN THAT GM CLASSIFIED AS NORMAL. THESE TRUCKS SHOULD NOT HAVE DRIVE SHAFT CLUNK WHEN STOPPING AT A TRAFFIC LIGHT. THESE VEHICLES HAVE MAJOR MECHANICAL CONCERNS AND THEIR QUALITY IS TRASH!
NHTSA complaint #11207803 — an unverified report by a vehicle owner.
WHEN COMING TO A STOP, APPLYING A STEADY AMOUNT OF BRAKE PRESSURE THE TRANSMISSION SHIFTS AND LOSES ALL FORMS OF ENGINE BRAKING CAUSING THE TRUCK TO SPEED UP AND OVERSHOOTS THE STOPSIGN.
NHTSA complaint #11180690 — an unverified report by a vehicle owner.
INTERIOR DASH LIGHTS GOES OUT AND A FEW MINUTES LATER THE ENGINE CUTS OFF WHILE I'M TRYING TO PARK. EACH TIME WHILE I WAS BACKING INTO MY PARKING SPACE. AFTER SITTING FOR ABOUT 30 SECONDS THE LIGHTS DASH BOARD LIGHTS COME BACK ON, THEN I RESTART THE TRUCK. SOMETIMES WHILE DRIVING THE DASH BOARD LIGHT BLINK OF AND ON.
NHTSA complaint #11141357 — an unverified report by a vehicle owner.