2018 GMC Sierra 1500 complaints

Purchased 2018 truck new from dealer on 2/19. Came with 20" rims and the spare tire is on a17"rim. Currently, there is a GM recall # N212346510 and NHTSA campaign #21V985000 for this issue. My truck is not included. Hazard: Based on failure of the anti-lock braking system when operating vehicle with three 20" rims and one 17" spare my vehicle should be include in the recall.

My rear back heated window on the passenger side popped and shattered the window while I was sitting in the passenger’s seat waiting for my husband. The truck smelled like a sweet wire smell and then I heard a loud pop. I looked back and the back window panel was shattered. I do see that there were recalls on some of these windows.

Im getting a service trailer brake system soon message on dash.

While driving parking lot speeds, when I pressed the brake pedal, it was very very difficult to push causing me to nearly rear end the car in front of me. This happened intermittently during a short time frame (5 minutes). While standing on the brake pedal hoping to stop in time, the brake pedal shook like the Antilock brakes were activating. This caused it to be even more difficult to stop in time. My vehicle is currently at my local dealership's service shop. When the issue occurred, a message stating "Service Brake Assist" popped up in my display.

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving approximately 70 MPH, the trailer wiring harness system warning message was illuminated. The vehicle was taken to a local dealer where it was diagnosed with needing the wiring harness replaced; however, the vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 77,000.

At 50,000 miles the "service trailer brake system" error message appears constantly due to factory defects and its very common. These trucks should be recalled everyone is in danger on the roads and its a very common problem. I have not taken it to the dealer because i should not have to pay for this very common problem, it should be recalled.

Driver's side seat belt receptacle does not hold. It is difficult to get seatbelt to latch properly. Sometimes it latches and releases later. Dealer confirmed seat belt receptacle needed to be replaced.

VEHICLE VIOLENTLY SHAKES AT ALL SPEEDS. DEALER BLAMED TIRES, I HAD NEW TIRES INSTALLED, STILL SHAKING. DEALER SAYS "NO PROBLEM FOUND, OPERATING AS DESIGNED" TRUCK IS A NUISANCE TO DRIVE, SHAKING BADLY

During down shifting in lower gears while reducing speed , transmission makes a loud noise followed by vehicle hard lounging forward . Occurance is intermittent and unpredictable . In city traffic this has potential to cause an accident because vehicle lounges forward when speed is reduced . Vehicle has 18900 miles . Made in 2017 .

Driver Assist-Lane Keeping Assist-Forward Collision Warning-Automatic Emergency Breaking Life Threatening When System Fails and is Intermittent . Vehicle has been said to be dangerous to drive by GM Tech/Can cause life threatening conditions. Fault has been confirmed by Dealership. WARNING LAMP> "SERVICE DRIVER ASSIST SYSTEM" Friday 3 December 2021 at approximately 21340 miles.

The truck displayed warning lights for ABS, traction control, trailer brakes, and front park assist. Additionally speed control (cruise) did not function. This presented a safety issue. I took to dealer asap. They repaired by replacing left rear wheel speed sensor. Cost about $216. Appears to work correctly at this time.

47,012 MILES RADIATOR FAILURE, LEAKING BADLY. GM DENIED REPAIR UNDER WARRANTY

BATTERY DIES AFTER 5DAYS OF NOT BEING DRIVEN. BATTERY CONTINUES TO GO DEAD, DEALER STATES NOTHING IS WRONG. NO REPAIRS WERE MADE. STRANDED 5 TIMES WITH A DEAD BATTERY

TRANSMISSION IS SLAMMING VIOLENTLY DURING SHIFTING, TRANSMISSION FLUID IS DARK AND CONTAMINATED. DEALER SAYS-" OPERATING AS DESIGNED, NO ISSUE FOUND" ALSO TRUCK SHAKES AND VIBRATES VIOLENTLY WHILE DRIVING

Vehicle suddenly went into Reduced Engine Power while driving in heavy traffic. Vehicle immediately began to slow down and although there was some throttle response it was difficult to maneuver through traffic to get to the side of the road. This event happened around the 31,000 mile mark. The Reduced Engine Power message came on, but I do not remember hearing an audible alert. Being a 40 year Automotive Technician for GM, I am familiar with pulling codes and replacing parts. I called the dealership to see if this was covered by warranty and was told no. After pulling the codes, I personally replaced the Throttle Body Sensor and the Accelerator Pedal Assembly, but the vehicle continued to go into Reduced Engine Power mode. I took the vehicle into the dealership and they diagnosed the cause as a corroded connector. The connector was replaced and the vehicle was returned to me. After a little over one month and less than 1,000 miles the vehicle is once again going into Reduced Engine Power mode. I can have my vehicle available for inspection if necessary.

Very very bad shudder vibration noticed mostly during light throttle acceleration of 30-64 mph (48-104 km/h) during steady state driving with the transmission not actively shifting gear..

The contact owns a 2018 GMC Sierra 1500. The contact stated that upon depressing the accelerator, the vehicle shuddered while upshifting. There was no warning light illuminated. The contact had taken the vehicle to a local dealer where they were unable to service the vehicle. The contact had also taken the vehicle to an independent mechanic who informed him that there was a TSB placed on the vehicle. He explained that the incorrect type of transmission fluid had been placed in the transmission which would cause the failure that he had experienced. The contact then called Sewell Buick GMC of Dallas (7474 Lemmon Ave, Dallas, TX 75209) where he was informed that he would be charged a diagnostic fee prior to the repair. The manufacturer was notified of the failure but offered no assistance. The vehicle was not repaired. The failure mileage was approximately 45,000.

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving at various speeds, the vehicle lost power steering assist causing the steering wheel to become firm. The steering wheel jerked while turning and the vehicle stalled on several occasions almost causing a collision. The vehicle was taken to the dealer and the dealer informed the contact that the failure was related to Technical Service Bulletin 18-NA-161. The vehicle was not repaired. The manufacturer was made aware of the failure. The manufacturer promised to provide a callback. The failure mileage was 47,184.

Check engine came on and says manufacture specific issues/codes. Safety restrain system. P10e4

All four OEM Bridgestone Dueler A/T P285/45R22 M+S tires are showing premature cracking in sidewall near the bead/wheel. The cracks appear on the full circumference of the tire and vary in length from short to several inches. Depth of cracking is estimated to be 1/16" and growing. The tires, with date code 2318, were on the brand new truck when purchased from the dealership in Aug 2018. The vehicle currently has 16k miles. Both the dealership and local Tires Plus chain have confirmed the issue, but there is not a suitable remedy. Bridgestone will not warranty the tires and replacement under the GM "warranty" is the same price as new aftermarket tires. I believe this is a pending safety concern.

The contact owns a 2018 GMC SIERRA. The contact stated that while driving at 35 mph, when another vehicle had collided with the contact's vehicle which resulted in the airbags not deploying. The contact stated no warning lights were illuminated. The contact sustained a head injury and did require medical attention. A police report was filed. The vehicle was towed to a local dealer where it was in the process of being repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 25,000. The VIN was not available. Vehicle has been repaired.*JB

I LEFT HOME TO GO TO THE STORE. WHILE DRIVING ON THE HIGHWAY MY SUNROOF EXPLODED. THERE WERE NO CARS OR TRUCK IN FRONT OF ME OR PASSING ME. NOTHING HIT MY TRUCK. IT SOUNDED LIKE A SHOTGUN GOING OFF INSIDE THE TRUCK. THE SUNROOF EXPLODED SENDING GLASS EVERYWHERE. I WAS DRIVING ON A 5 LANE HIGHWAY, IT WAS RAINING, BUT NOT A BAD STORM. THE ROAD WAS STRAIGHT AND IN GOOD CONDITION. IT HAPPENED SO FAST I DID NOT KNOW WHAT WAS GOING ON. I PULLED INTO A GAS STATION TO CHECK MY TRUCK. I FOUND GLASS ALL IN THE BED OF THE TRUCK AND MOST OF THE SUNROOF GONE. I HAVE TAKEN IT TO THE DEALER AS THE TRUCK IS UNDER WARRANTY. I WAS TOLD THE WARRANTY DOES NOT COVER DAMAGE AND SO FAR NO ANSWER IT THEY WILL COVER IT. I HAVE HAD THE TRUCK FOR ALMOST 3 YEARS AND IT IS NEARING THE END OF THE WARRANTY.

POWER STEERING JUST GOES OUT WHILE DRIVING (PULLING INTO PARKING LOT) AND THEN COMES BACK ON CAUSING AN OVERSTEERING PROBLEM.

SPARE TIRE CRANK CABLE BROKE ALLOWING SPARE TIRE TO FALL OUT FROM UNDER THE TRUCK ON THE INTERSTATE AT 70 MPH. SPARE TIRE SLIDE BACKWARDS UNDER MY 5TH WHEEL CAMPER DAMAGING THE CAMPER AND FLYING OFF INTO THE HIGHWAY MEDIAN.

TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE VEHICLE VIBRATED ABNORMALLY WHILE DRIVING. THE VEHICLE WAS TAKEN TO INGERSOLL AUTO OF DANBURY (84 FEDERAL RD, DANBURY, CT 06810, (203)885-7774) FOR AN OIL CHANGE AND THE ENGINE WAS FLUSHED ON FOUR OCCASIONS. THE CONTACT STATED THAT THE VIBRATION INCREASED. THE VEHICLE WAS TAKEN TO THE SAME DEALER AND A TIRE ROTATION AND ALIGNMENT WAS PERFORMED. THE CONTACT WAS ALSO INFORMED THAT THE TIRES NEEDED TO BE REPLACED. THE TORQUE CONVERTER WAS ALSO REPLACED HOWEVER, THE FAILURE REMAINED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT TO NHTSA FOR ASSISTANCE. THE APPROXIMATE FAILURE MILEAGE WAS 47,000.

AT 55000 MILES THE RADIATOR STARTED TOO LEAK GM WOULD ONLY PAY 250.00 DOLLARS OF THE 876.00 IT COST

WHILE DRIVING WITH THE ROADS IN A WET CONDITION, FOR VARIOUS LENGTHS OF TIME, AND IN DIFFERENT MANEUVERS, THE SERVICE ENGINE LIGHT WILL START FLASHING AND THE VEHICLE WILL BEGIN TO LOSE POWER. AFTER A FEW MINUTES, THE SERVICE ENGINE LIGHT WILL GO SOLID AND THE TRACTION CONTROL LIGHT WILL ILLUMINATE. THE VEHICLE LOSES MORE POWER. ON BRAKING, JUST BEFORE THE VEHICLE COMES TO A COMPLETE STOP, THERE IS A CLUNK IN THE TRANSMISSION AND THE VEHICLE LURCHES. THIS HAS OCCURRED 6 TIMES IN THE LAST 14 MONTHS. UPON INVESTIGATION, TROUBLE CODE P0308 SHOWS IN THE OBD TOOL. THE ISSUE COULD NOT BE REPRODUCE BY THE DEALERSHIP SO THERE HAS NOT BEEN ANY RESOLUTION, JUST THOUGHTS.

I HAVE TAKEN MY TRUCK TO TEMECULA VALLEY BUICK GMC ON 3 SEPARATE OCCASIONS AFTER NOTICING MY TRANSMISSION SHIFTS HARD. I HAVE EXPERIENCE CLUNKING SHIFTS BOTH IN THE UP SHIFT AND DOWN SHIFT, TYPICALLY AT LOWER SPEEDS. THERE ARE TIMES WHEN THE TRANSMISSION SHIFTS GEARS IT PROPELS THE VEHICLE FORWARD IN A JERKING FASHION, VERY SIMILAR TO A REAR END FENDER BENDER. THE LAST TIME I TOOK MY VEHICLE TO THE DEALERSHIP, I WAS TOLD THAT THE VEHICLE IS SHIFTING AT NORMAL SPECS AND IF IT KEEPS ACTING UP, TO BRING IT BACK WHEN IT IS MORE CONSISTENT. THE VEHICLE'S WARRANTY RUNS OUT IN A FEW MONTHS.

TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT A COOLANT SMELL WOULD EMIT FROM THE VEHICLE UPON EXIT. THE CONTACT ALSO STATED THAT HIS VEHICLE HAD BEGAN TO LOSE COOLANT AT AN ABNORMAL RATE AND HAD TO BE FREQUENTLY REPLACED. THE CONTACT TOOK THE VEHICLE TO MCCONNELL AUTOMOTIVE (3150 DAUPHIN ST, MOBILE, AL 36606) WHERE THEY CONFIRMED THAT THERE WAS A CRACK IN THE RADIATOR WHICH RESULTED IN A COOLANT LEAK. HE WAS ALSO INFORMED THAT THERE WAS NO RECALL ON THE VIN AND THAT THE WARRANTY DID NOT COVER THE REPAIR. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND PROVIDED THE SAME INFORMATION AS THE DEALER. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 42,000.

THE RADIATOR IS LEAKING COOLANT WITHOUT ANY REAL CAUSE AND I WAS TOLD THE ENTIRE RADIATOR NEEDS TO BE REPLACED.

AFTER COLD STARTS WHEN ACCELERATING THE TRANSMISSION SLIPS FROM 1ST TO 2ND AND THROWS YOUR BODY FORWARD. AFTER THAT FIRST GEAR CHANGE IT DOESN'T DO IT AGAIN UNTIL ANOTHER COLD START. AROUND 34000 MILES I AM GETTING A RUMBLING VIBRATION THROUGH THE DASH AND STEERING WHEEL WHEN HOLDING SPEED BETWEEN 35-75 MPH. THE RPM GUAGE WILL JUMP SLIGHTLY AND IT WILL FEEL LIKE GOING OVER RUMBLE STRIPS. ACCELERATION IS VERY WEAK AT TIMES. SOMETIMES ITS OK. THERE HAS TO BE SOMETHING DONE WITH THESE TORQUE CONVERTERS AND TRANSMISSIONS BY GM. UNACCEPTABLE FOR A 40-50K DOLLAR TRUCK!

I HAVE HAD MY GMC SIERRA 1500 FOR ALMOST 3 YEARS. I HAVE A LITTLE UNDER 59,000 MILES ON THE TRUCK. A FEW THOUSAND MILES AGO A TECH AT THE GM DEALER LET ME KNOW THAT THEY HAD TO ADD SOME COOLANT AND IT WAS SOMETHING I SHOULD KEEP AN EYE ON. I BROUGHT THE VEHICLE BACK TO HAVE THEM LOOK INTO IT. THEY LET ME KNOW THAT THE RADIATOR HAS A SMALL LEAK. IT IS NOT BIG ENOUGH TO HAVE FLUID HIT THE GROUND IN MY GARAGE BUT IT IS LOOSING FLUID. I LOOKED ONLINE AND SAW THAT THIS IS A COMMON ISSUE. I WAS TOLD THAT IT WAS NOT COVERED UNDER WARRANTY AND IT WOULD COST A GOOD AMOUNT TO FIX. I HAVE HAD THIS VEHICLE FOR UNDER 3 YEARS AND HAVE HAD 5 ISSUES WITHOUT ANY OF THEM BEING COVERED BY WARRANTY. THIS VEHICLE SEEMS TO BE A LEMON.

TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE TEMPERATURE GAUGE INDICATED THAT THE VEHICLE WAS OVERHEATED. NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO BECK & MASTEN BUICK GMC NORTH (11300 FM 1960 WEST, HOUSTON, TX 77065, (877) 380-8433) WHERE IT WAS DIAGNOSED AND DETERMINED THAT THE RADIATOR WAS LEAKING COOLANT AND THAT THE RADIATOR NEEDED TO BE REPLACED. COOLANT WAS REFILLED IN THE VEHICLE. THE DEALER CONTACTED THE MANUFACTURER FOR ASSISTANCE WITH REPAIRS. THE FAILURE MILEAGE WAS APPROXIMATELY 47,000.

HAVE BEEN TO DEALER 3 TIMES TRANSMISSION RUFF/SLIPPING ON 1-2 SHIFT

TRUCK SHIFTS HARD FROM 1ST TO 2ND GEAR AND VICE VERSA. WHEN DOWN SHIFTING FROM 2ND TO 1ST IT FEELS AS IF YOU GET REAR ENDED BY ANOTHER VEHICLE. IT SHIFTS HARD WHEN SWITCHING BETWEEN DRIVE AND REVERSE WITH AN AUDIBLE "CLUNK" AND JERKING ON THE TRUCK.

HESITATION WHEN ENGINE IS COLD SHIFTING FROM REVERSE TO DRIVE. SOME SHIFT IS SO HARD THAT IT FEELS LIKE BEING HIT FROM BEHIND. TOOK TRUCK TO DEALERSHIP TO CORRECT THE PROBLEM. THEY PERFORMED THE TSB 18-NA-355. THIS DID NOT CORRECT THE PROBLEM. DEALERSHIP ADVISED THERE WAS NOTHING ELSE THEY COULD DO ABOUT THIS ISSUE.

THE FIRST THING THAT HAPPENED WAS THAT ALL OF THE ELECTRICAL SYSTEMS ON MY TRUCK WENT OUT AND MY TRUCK WOULD NOT START. IT FINALLY STARTED BUT IT WOULD NOT MOVE FINALLY IT WOULD MOVE BUT VERY SLOWLY THIS HAPPENED ON 11/20/2019 I HAVE DOCUMENTATION THROUGH ONSTAR FOR THIS INCIDENT. MY BRAKES STARTED SLIPPING ON 07/01/2020 AND STILL DO NOT WORK PROPERLY. MY TRANSMISSION HAS NEVER SHIFTED CORRECTLY. WHEN I ACCELERATE OR WHEN I SLOW DOWN THERE IS A SHUDDER AND A JERKING SOUND. AFTER SITTING FOR A WHILE WHEN MY TRUCK IS PUT IN REVERSE IT HESITATES AND THEN SEEMS TO JUMP INTO GEAR.

AFTER LONG PERIODS OF RUNNING AND IDLE, VEHICLE STALLS OUT HAS A HARD TIME RESTARTING. GAS PADDLE BEING PRESS HELPS SOMETIMES. CHECK CODE P2635 PLUS OTHERS (RANDOM SECONDARY CODES), COME ON. THIS HAS TAKEN PLACE IN AZ WHERE THE AMBIENT AIR TEMPERATURE TYPICALLY IS OVER 100. VEHICLE HAS BEEN TO GM DEALER WHO SAYS ITS VAPORIZING THE FUEL IN THE LINES. TSB PIP5507B DOSE NOT INCLUDE 2018, HOWEVER THE DESIGN HASN'T CHANGED. CONDITIONS; LONG IDLE, HOT WEATHER, LOW SPEEDS UNDER 25 MPH OR IDLE. LOCATION; AZ SONRONA DESSERT, OFF-ROAD, JOBSITE, CITY STREETS.

HARD SHIFTING THAT STARTED AROUND 40000 MILES AND HAS PROGRESSIVELY GOTTEN WORSE. THE SAME THING HAPPENED TO MY 2017 CHEVROLET SILVERADO 1500 AND AT 90000 MILES THAT VEHICLE'S #3 SENSOR IN THE TRANSMISSION FAILED. IT APPEARS THIS VEHICLE IS ON THE SAME PATH. THE TRANSMISSIONS IN THESE VEHICLES ARE TRASH. IT HAPPENS IN LOWER GEARS.

THE TRANSMISSION FAILED AT 32,000 MILES SLIPPED SO BAD COULD HARDLY DRIVE IT HOME ON HIGHWAY I95 JACKSONVILLE FLORIDA. FINALLY GOT A DEALER APPOINTMENT AFTER OVER 2 WEEKS OF WAITING WITHOUT THE USE THE VEHICLE. THEY REPLACED THE FLUID AND SAID IT WAS NOW GOOD. STILL TENDS TO SLIP I ASKED WHY THEY WERE NOT REPLACING THE WHOLE UNIT SAID NO NEED AS MY WARRANTY IS ALMOST UP?

TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE AIR CONDITIONER DID NOT COOL WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE KING CADILLAC DEALER, LOCATED AT: 1700 W EVANS ST, FLORENCE, SC 29501 WHERE IT WAS DIAGNOSED THAT THE CONDENSER NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 50,000.

I RECEIVED A RECALL NOTICE FOR A BRAKE PROBLEM ON MY TRUCK. THE RECALL GAVE A LOCATION TO TAKE MY TRUCK FOR SERVICE. WHEN I CONTACTED THAT DEALERSHIP THEY SAID IT WAS A CANADIAN TRUCK AND THEY COULDN'T PERFORM THE RECALL REPAIR. SO I CALLED THE GM HOT LINE THEY SAID I HAD TO TAKE IT TO CANADA FOR THE REPAIR AND THAT WAS THE ONLY OPTION.

WHEN DRIVING THE TRUCK STARTS TO RATTLE AS IS I WAS DRIVING ON A BUMPY ROAD. IT IS NOT CONTINUOUSLY BUT ID HAPPENS OFTEN

I HAVE BEEN NOTICING A SHUDDER AND HARD SHIFTING INTERMITTENTLY WHEN DRIVING ABOUT 30-60MPH AND I TOOK IT INTO THE SHOP THEY SAID THEY CAN NOT DUPLICAT THE ISSUES SO I TAKE IT BACK AND IT STARTED DOING IT MORE. I TOOK THE TRUCK BACK TO THE SHOP AGAIN AND YET AGAIN THEY TOLD ME THEY CAN NOT DUPLICATE THE ISSUE. NO HERE I AM AT 17K MILES ON IS STILL DOING IT AND SHIFTTING HARD AND NOW THERE IS A KNOCKING NOISE. I TALKED TO THE DEALER SHIP AND THEY SAID ITS UNDER WARRANY STILL JUST DRIVE IT TELL IT GET WORSE.

WHILE UNDER POWER AND DRIVING, THE TRUCK EXPERIENCES NOTICEABLE VIBRATIONS THAT SEEM TO COME FROM THE DRIVETRAIN.

TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE AIR CONDITIONER WAS INOPERABLE, CAUSING VISIBILITY ISSUES WHILE DRIVING. DUE TO THE FAILURE, THE DEFROSTER/DEFOGGER SYSTEM WAS INOPERABLE. MCCONNELL AUTOMOTIVE (3150 DAUPHIN ST, MOBILE, AL 36606, (251)476-4141) WAS INFORMED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NOT SUBJECTED TO A RECALL. THE DEALER PROVIDED AN ESTIMATE OF $1,191 TO REPAIR THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE 50,724.

PURCHASED VEHICLE BRAND NEW FROM DEALERSHIP AND FROM DAY ONE, I NOTICE THE POWER TRAIN SLOW TO SHIFTING FROM GEAR ONE TO TWO. THE VEHICLE HESITATES AND SOMETIMES SHIFTS HARD ONLY DURING COLD STARTS. EVERY TIME I TAKE IT IN FOR MY SCHEDULE SERVICE I REPORT THE SAME ISSUE TO MY SERVICE ADVISOR ALONG WITH THE SERVICE MANAGER AT THE GMC DEALERSHIP. THEY SAY THAT IT IS A NORMAL PROBLEM AND THEY KNOW ABOUT IT. THE LAST SCHEDULE SERVICE I TOLD THEM ABOUT THE SAME PROBLEM, THIS TIME HIS SERVICE TECH TEST DROVE VEHICLE AND SAID TORQUE CONVERTER WAS SHUDDERING CAUSING VIBRATION. THE SOLUTION HE SAID THEY CHANGED THE TRANSMISSION FLUID. TODAY I STILL NOTICE THE SAME ISSUE AND WILL REPORT TO THE DEALERSHIP NEXT TIME I TAKE IN FOR SERVICE. I HAVE READ THIS IS A COMMON PROBLEM FROM THE MANUFACTURE SINCE PUTTING IN AN 8 SPEED TRANSMISSION. I FEEL THIS IS A SAFETY ISSUE AND SOME DAY I MAY FEEL THAT THE TRANSMISSION MAY LOCK UP ON ME AND MAY CAUSE AN ACCIDENT. *TR

WHEN TRUCK IS IN MOTION SHIFTING FROM REVERSE TO FIRST/SECOND GEAR IT JUMPS FORWARD INTO GEAR. THERE IS A HESITATION SHIFTING INTO GEAR. IT IS A VERY WELL KNOWN PROBLEM WITH THE 8 SPEED TRANSMISSION. I HAVE BEEN IN CONTACT WITH THE DEALER BUT 3 DIFFERENT TIMES. THE KNOW THE PROBLEM AS DOES GMC. THEY ACTUALLY CAN FIX THE PROBLEM. BUT WILL NOT DO ANYTHING UNTIL GMC SENDS OUT A TECHNICAL BULLETIN. THERE HAS BEEN AN UNBELIEVABLE AMOUNT OF COMPLAINTS. I UNDERSTAND GMC IS HESITANT BECAUSE THEY MAY HAVE TO REPLACE TRANSMISSION AND OR TORQUE CONVERTER WHICH WOULD NATURALLY COST A LOT OF MONEY. BUT ALSO I UNDERSTAND CHANGING TO A DIFFERENT TRANSMISSION FLUID WILL HELP. BUT DEALER WILL NOT DO IT. THIS HAS BEEN GOING ON SINCE THE DAY I BOUGHT IT BRAND NEW AND I ONLY HAVE 5700 MILES ON IT. I HAVE NOT HAD ACCIDENT BECAUSE OF THIS. BUT CONCERNS ME WITH THE HESITATION AND JUMPING IN TO GEAR. ALSO IT DOES NOT DO IT EVERY SINGLE TIME. DEPENDS ON YOUR TAKE OFF SPEED. *TR

I BOUGHT THIS VEHICLE NEW FROM DAY ONE I NOTICED THE TRUCK WAS JERKING BETWEEN 2ND GEAR AND THIRD. ONLY WHEN COLD I FIGURED IT WAS NORMAL. I HAVE 11,000 MILES NOW AND THE JERKING IS WORSE AND DOES IT WHEN I HOLD A SPEED BETWEEN 45MPH AND 50MPH ALSO. WHEN I AM COMING TO A STOP IT HIT HARD INTO 1ST GEAR AND WHEN I TAKE OFF IT HITS HARD INTO 2ND GEAR. *TR

CONDENSER ON AC LEAKING AT SAME LOCATION AS THE 2014-2017 MY. WARRANTY WAS OUT DUE TO MILEAGE BUT TRUCK IS ONLY 2 YEARS 3 MONTHS OLD. BLOWING WARM AIR WHEN AC WAS TURNED ON. *TR